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mysql show processlist命令 详解

SHOW PROCESSLIST显示哪些线程正在运行。您也可以使用mysqladmin processlist语句得到此信息。如果您有SUPER权限,您可以看到所有线程。否则,您只能看到您自己的线程(也就是,与您正在使用的MySQL账户相关的线程)。请参见13.5.5.3节,“KILL语法”。如果您不使用FULL关键词,则只显示每个查询的前100个字符。

本语句报告TCP/IP连接的主机名称(采用host_name:client_port格式),以方便地判定哪个客户端正在做什么。

如果您得到“too many connections”错误信息,并且想要了解正在发生的情况,本语句是非常有用的。MySQL保留一个额外的连接,让拥有SUPER权限的 账户使用,以确保管理员能够随时连接和检查系统(假设您没有把此权限给予所有的用户)。

mysql> show full processlist;  
+---------+-------------+--------------------+----------------+-------------+-------+-----------------------------------------------------------------------+-----------------------+  
| Id      | User        | Host               | db             | Command     | Time  | State                                                                 | Info                  |  
+---------+-------------+--------------------+----------------+-------------+-------+-----------------------------------------------------------------------+-----------------------+  
| 1056536 | replication | 192.168.6.91:38417 | NULL           | Binlog Dump | 33759 | Master has sent all binlog to slave; waiting for binlog to be updated | NULL                  |  
| 1107067 | miaohr      | 192.168.6.81:32024 | NULL           | Query       |     0 | NULL                                                                  | show full processlist |  
| 1107182 | miaohr      | 192.168.6.91:44217 | hr_db_business | Sleep       |     1 |                                                                       | NULL                  |  
+---------+-------------+--------------------+----------------+-------------+-------+-----------------------------------------------------------------------+-----------------------+  

这个命令中最关键的就是state列,mysql列出的状态主要有以下几种:

Checking table
 正在检查数据表(这是自动的)。
Closing tables
 正在将表中修改的数据刷新到磁盘中,同时正在关闭已经用完的表。这是一个很快的操作,如果不是这样的话,就应该确认磁盘空间是否已经满了或者磁盘是否正处于重负中。
Connect Out
 复制从服务器正在连接主服务器。
Copying to tmp table on disk
 由于临时结果集大于tmp_table_size,正在将临时表从内存存储转为磁盘存储以此节省内存。
Creating tmp table
 正在创建临时表以存放部分查询结果。
deleting from main table
 服务器正在执行多表删除中的第一部分,刚删除第一个表。
deleting from reference tables
 服务器正在执行多表删除中的第二部分,正在删除其他表的记录。
Flushing tables
 正在执行FLUSH TABLES,等待其他线程关闭数据表。
Killed
 发送了一个kill请求给某线程,那么这个线程将会检查kill标志位,同时会放弃下一个kill请求。MySQL会在每次的主循环中检查kill标志位,不过有些情况下该线程可能会过一小段才能死掉。如果该线程程被其他线程锁住了,那么kill请求会在锁释放时马上生效。
Locked
 被其他查询锁住了。
Sending data
 正在处理SELECT查询的记录,同时正在把结果发送给客户端。
Sorting for group
 正在为GROUP BY做排序。
 Sorting for order
 正在为ORDER BY做排序。
Opening tables
 这个过程应该会很快,除非受到其他因素的干扰。例如,在执ALTER TABLE或LOCK TABLE语句行完以前,数据表无法被其他线程打开。正尝试打开一个表。
Removing duplicates
 正在执行一个SELECT DISTINCT方式的查询,但是MySQL无法在前一个阶段优化掉那些重复的记录。因此,MySQL需要再次去掉重复的记录,然后再把结果发送给客户端。
Reopen table
 获得了对一个表的锁,但是必须在表结构修改之后才能获得这个锁。已经释放锁,关闭数据表,正尝试重新打开数据表。
Repair by sorting
 修复指令正在排序以创建索引。
Repair with keycache
 修复指令正在利用索引缓存一个一个地创建新索引。它会比Repair by sorting慢些。
Searching rows for update
 正在讲符合条件的记录找出来以备更新。它必须在UPDATE要修改相关的记录之前就完成了。
Sleeping
 正在等待客户端发送新请求.
System lock
 正在等待取得一个外部的系统锁。如果当前没有运行多个mysqld服务器同时请求同一个表,那么可以通过增加--skip-external-locking参数来禁止外部系统锁。
Upgrading lock
 INSERT DELAYED正在尝试取得一个锁表以插入新记录。
Updating
 正在搜索匹配的记录,并且修改它们。
User Lock
 正在等待GET_LOCK()。
Waiting for tables
 该线程得到通知,数据表结构已经被修改了,需要重新打开数据表以取得新的结构。然后,为了能的重新打开数据表,必须等到所有其他线程关闭这个表。以下几种情况下会产生这个通知:FLUSH TABLES tbl_name, ALTER TABLE, RENAME TABLE, REPAIR TABLE, ANALYZE TABLE,或OPTIMIZE TABLE。
waiting for handler insert
 INSERT DELAYED已经处理完了所有待处理的插入操作,正在等待新的请求。
 大部分状态对应很快的操作,只要有一个线程保持同一个状态好几秒钟,那么可能是有问题发生了,需要检查一下。
 还有其他的状态没在上面中列出来,不过它们大部分只是在查看服务器是否有存在错误是才用得着。

mysql 查看当前连接数

命令: show processlist; 
如果是root帐号,你能看到所有用户的当前连接。如果是其它普通帐号,只能看到自己占用的连接。 
show processlist;只列出前100条,如果想全列出请使用show full processlist; 
mysql> show processlist;

命令: show status;

mysql> show status;  
+------------------------------------------+----------------------+  
| Variable_name                            | Value                |  
+------------------------------------------+----------------------+  
| Aborted_clients                          | 777                  |  
| Aborted_connects                         | 16                   |  
| Binlog_cache_disk_use                    | 532                  |  
| Binlog_cache_use                         | 8333221              |  
| Binlog_stmt_cache_disk_use               | 0                    |  
| Binlog_stmt_cache_use                    | 18732                |  
| Bytes_received                           | 303                  |  
| Bytes_sent                               | 12460                |  
| Com_admin_commands                       | 0                    |  
| Com_assign_to_keycache                   | 0                    |  
| Com_alter_db                             | 0                    |  
| Com_alter_db_upgrade                     | 0                    |  
| Com_alter_event                          | 0                    |  
| Com_alter_function                       | 0                    |  
| Com_alter_procedure                      | 0                    |  
| Com_alter_server                         | 0                    |  
| Com_alter_table                          | 0                    |  
| Com_alter_tablespace                     | 0                    |  
| Com_analyze                              | 0                    |  
| Com_begin                                | 0                    |  
| Com_binlog                               | 0                    |  
| Com_call_procedure                       | 0                    |  
| Com_change_db                            | 0                    |  
| Com_change_master                        | 0                    |  
| Com_check                                | 0                    |  
| Com_checksum                             | 0                    |  
| Com_commit                               | 0                    |  
| Com_create_db                            | 0                    |  
| Com_create_event                         | 0                    |  
| Com_create_function                      | 0                    |  
| Com_create_index                         | 0                    |  
| Com_create_procedure                     | 0                    |  
| Com_create_server                        | 0                    |  
| Com_create_table                         | 0                    |  
| Com_create_trigger                       | 0                    |  
| Com_create_udf                           | 0                    |  
| Com_create_user                          | 0                    |  
| Com_create_view                          | 0                    |  
| Com_dealloc_sql                          | 0                    |  
| Com_delete                               | 0                    |  
| Com_delete_multi                         | 0                    |  
| Com_do                                   | 0                    |  
| Com_drop_db                              | 0                    |  
| Com_drop_event                           | 0                    |  
| Com_drop_function                        | 0                    |  
| Com_drop_index                           | 0                    |  
| Com_drop_procedure                       | 0                    |  
| Com_drop_server                          | 0                    |  
| Com_drop_table                           | 0                    |  
| Com_drop_trigger                         | 0                    |  
| Com_drop_user                            | 0                    |  
| Com_drop_view                            | 0                    |  
| Com_empty_query                          | 0                    |  
| Com_execute_sql                          | 0                    |  
| Com_flush                                | 0                    |  
| Com_grant                                | 0                    |  
| Com_ha_close                             | 0                    |  
| Com_ha_open                              | 0                    |  
| Com_ha_read                              | 0                    |  
| Com_help                                 | 0                    |  
| Com_insert                               | 0                    |  
| Com_insert_select                        | 0                    |  
| Com_install_plugin                       | 0                    |  
| Com_kill                                 | 0                    |  
| Com_load                                 | 0                    |  
| Com_lock_tables                          | 0                    |  
| Com_optimize                             | 0                    |  
| Com_preload_keys                         | 0                    |  
| Com_prepare_sql                          | 0                    |  
| Com_purge                                | 0                    |  
| Com_purge_before_date                    | 0                    |  
| Com_release_savepoint                    | 0                    |  
| Com_rename_table                         | 0                    |  
| Com_rename_user                          | 0                    |  
| Com_repair                               | 0                    |  
| Com_replace                              | 0                    |  
| Com_replace_select                       | 0                    |  
| Com_reset                                | 0                    |  
| Com_resignal                             | 0                    |  
| Com_revoke                               | 0                    |  
| Com_revoke_all                           | 0                    |  
| Com_rollback                             | 0                    |  
| Com_rollback_to_savepoint                | 0                    |  
| Com_savepoint                            | 0                    |  
| Com_select                               | 1                    |  
| Com_set_option                           | 0                    |  
| Com_signal                               | 0                    |  
| Com_show_authors                         | 0                    |  
| Com_show_binlog_events                   | 0                    |  
| Com_show_binlogs                         | 0                    |  
| Com_show_charsets                        | 0                    |  
| Com_show_collations                      | 0                    |  
| Com_show_contributors                    | 0                    |  
| Com_show_create_db                       | 0                    |  
| Com_show_create_event                    | 0                    |  
| Com_show_create_func                     | 0                    |  
| Com_show_create_proc                     | 0                    |  
| Com_show_create_table                    | 0                    |  
| Com_show_create_trigger                  | 0                    |  
| Com_show_databases                       | 0                    |  
| Com_show_engine_logs                     | 0                    |  
| Com_show_engine_mutex                    | 0                    |  
| Com_show_engine_status                   | 0                    |  
| Com_show_events                          | 0                    |  
| Com_show_errors                          | 0                    |  
| Com_show_fields                          | 0                    |  
| Com_show_function_status                 | 0                    |  
| Com_show_grants                          | 0                    |  
| Com_show_keys                            | 0                    |  
| Com_show_master_status                   | 0                    |  
| Com_show_open_tables                     | 0                    |  
| Com_show_plugins                         | 0                    |  
| Com_show_privileges                      | 0                    |  
| Com_show_procedure_status                | 0                    |  
| Com_show_processlist                     | 6                    |  
| Com_show_profile                         | 0                    |  
| Com_show_profiles                        | 0                    |  
| Com_show_relaylog_events                 | 0                    |  
| Com_show_slave_hosts                     | 0                    |  
| Com_show_slave_status                    | 0                    |  
| Com_show_status                          | 2                    |  
| Com_show_storage_engines                 | 0                    |  
| Com_show_table_status                    | 0                    |  
| Com_show_tables                          | 0                    |  
| Com_show_triggers                        | 0                    |  
| Com_show_variables                       | 0                    |  
| Com_show_warnings                        | 0                    |  
| Com_slave_start                          | 0                    |  
| Com_slave_stop                           | 0                    |  
| Com_stmt_close                           | 0                    |  
| Com_stmt_execute                         | 0                    |  
| Com_stmt_fetch                           | 0                    |  
| Com_stmt_prepare                         | 0                    |  
| Com_stmt_reprepare                       | 0                    |  
| Com_stmt_reset                           | 0                    |  
| Com_stmt_send_long_data                  | 0                    |  
| Com_truncate                             | 0                    |  
| Com_uninstall_plugin                     | 0                    |  
| Com_unlock_tables                        | 0                    |  
| Com_update                               | 0                    |  
| Com_update_multi                         | 0                    |  
| Com_xa_commit                            | 0                    |  
| Com_xa_end                               | 0                    |  
| Com_xa_prepare                           | 0                    |  
| Com_xa_recover                           | 0                    |  
| Com_xa_rollback                          | 0                    |  
| Com_xa_start                             | 0                    |  
| Compression                              | OFF                  |  
| Connections                              | 1107216              |  
| Created_tmp_disk_tables                  | 0                    |  
| Created_tmp_files                        | 564                  |  
| Created_tmp_tables                       | 0                    |  
| Delayed_errors                           | 0                    |  
| Delayed_insert_threads                   | 0                    |  
| Delayed_writes                           | 0                    |  
| Flush_commands                           | 1                    |  
| Handler_commit                           | 0                    |  
| Handler_delete                           | 0                    |  
| Handler_discover                         | 0                    |  
| Handler_prepare                          | 0                    |  
| Handler_read_first                       | 0                    |  
| Handler_read_key                         | 0                    |  
| Handler_read_last                        | 0                    |  
| Handler_read_next                        | 0                    |  
| Handler_read_prev                        | 0                    |  
| Handler_read_rnd                         | 0                    |  
| Handler_read_rnd_next                    | 0                    |  
| Handler_rollback                         | 0                    |  
| Handler_savepoint                        | 0                    |  
| Handler_savepoint_rollback               | 0                    |  
| Handler_update                           | 0                    |  
| Handler_write                            | 0                    |  
| Innodb_buffer_pool_pages_data            | 376178               |  
| Innodb_buffer_pool_bytes_data            | 4261109760           |  
| Innodb_buffer_pool_pages_dirty           | 0                    |  
| Innodb_buffer_pool_bytes_dirty           | 0                    |  
| Innodb_buffer_pool_pages_flushed         | 4419408              |  
| Innodb_buffer_pool_pages_free            | 0                    |  
| Innodb_buffer_pool_pages_misc            | 18446744073709437581 |  
| Innodb_buffer_pool_pages_total           | 262143               |  
| Innodb_buffer_pool_read_ahead_rnd        | 0                    |  
| Innodb_buffer_pool_read_ahead            | 506357               |  
| Innodb_buffer_pool_read_ahead_evicted    | 49891                |  
| Innodb_buffer_pool_read_requests         | 3550554620           |  
| Innodb_buffer_pool_reads                 | 8777938              |  
| Innodb_buffer_pool_wait_free             | 0                    |  
| Innodb_buffer_pool_write_requests        | 159577779            |  
| Innodb_data_fsyncs                       | 13359191             |  
| Innodb_data_pending_fsyncs               | 0                    |  
| Innodb_data_pending_reads                | 0                    |  
| Innodb_data_pending_writes               | 0                    |  
| Innodb_data_read                         | 133311885312         |  
| Innodb_data_reads                        | 9323868              |  
| Innodb_data_writes                       | 17580993             |  
| Innodb_data_written                      | 163731449856         |  
| Innodb_dblwr_pages_written               | 4419408              |  
| Innodb_dblwr_writes                      | 119202               |  
| Innodb_have_atomic_builtins              | ON                   |  
| Innodb_log_waits                         | 0                    |  
| Innodb_log_write_requests                | 39730223             |  
| Innodb_log_writes                        | 12957426             |  
| Innodb_os_log_fsyncs                     | 13004841             |  
| Innodb_os_log_pending_fsyncs             | 0                    |  
| Innodb_os_log_pending_writes             | 0                    |  
| Innodb_os_log_written                    | 25546702336          |  
| Innodb_page_size                         | 16384                |  
| Innodb_pages_created                     | 539547               |  
| Innodb_pages_read                        | 9323581              |  
| Innodb_pages_written                     | 4419408              |  
| Innodb_row_lock_current_waits            | 0                    |  
| Innodb_row_lock_time                     | 26866245             |  
| Innodb_row_lock_time_avg                 | 1367                 |  
| Innodb_row_lock_time_max                 | 55497                |  
| Innodb_row_lock_waits                    | 19649                |  
| Innodb_rows_deleted                      | 15511                |  
| Innodb_rows_inserted                     | 1868056              |  
| Innodb_rows_read                         | 1657696248           |  
| Innodb_rows_updated                      | 7778106              |  
| Innodb_truncated_status_writes           | 0                    |  
| Key_blocks_not_flushed                   | 0                    |  
| Key_blocks_unused                        | 26773                |  
| Key_blocks_used                          | 19                   |  
| Key_read_requests                        | 67555                |  
| Key_reads                                | 19                   |  
| Key_write_requests                       | 69364                |  
| Key_writes                               | 11544                |  
| Last_query_cost                          | 0.000000             |  
| Max_used_connections                     | 436                  |  
| Not_flushed_delayed_rows                 | 0                    |  
| Open_files                               | 99                   |  
| Open_streams                             | 0                    |  
| Open_table_definitions                   | 327                  |  
| Open_tables                              | 1301                 |  
| Opened_files                             | 22851                |  
| Opened_table_definitions                 | 0                    |  
| Opened_tables                            | 0                    |  
| Performance_schema_cond_classes_lost     | 0                    |  
| Performance_schema_cond_instances_lost   | 0                    |  
| Performance_schema_file_classes_lost     | 0                    |  
| Performance_schema_file_handles_lost     | 0                    |  
| Performance_schema_file_instances_lost   | 0                    |  
| Performance_schema_locker_lost           | 0                    |  
| Performance_schema_mutex_classes_lost    | 0                    |  
| Performance_schema_mutex_instances_lost  | 0                    |  
| Performance_schema_rwlock_classes_lost   | 0                    |  
| Performance_schema_rwlock_instances_lost | 0                    |  
| Performance_schema_table_handles_lost    | 0                    |  
| Performance_schema_table_instances_lost  | 0                    |  
| Performance_schema_thread_classes_lost   | 0                    |  
| Performance_schema_thread_instances_lost | 0                    |  
| Prepared_stmt_count                      | 0                    |  
| Qcache_free_blocks                       | 3426                 |  
| Qcache_free_memory                       | 38784160             |  
| Qcache_hits                              | 9223399              |  
| Qcache_inserts                           | 3505151              |  
| Qcache_lowmem_prunes                     | 0                    |  
| Qcache_not_cached                        | 400457               |  
| Qcache_queries_in_cache                  | 19336                |  
| Qcache_total_blocks                      | 42289                |  
| Queries                                  | 27883378             |  
| Questions                                | 9                    |  
| Rpl_status                               | AUTH_MASTER          |  
| Select_full_join                         | 0                    |  
| Select_full_range_join                   | 0                    |  
| Select_range                             | 0                    |  
| Select_range_check                       | 0                    |  
| Select_scan                              | 0                    |  
| Slave_heartbeat_period                   | 0.000                |  
| Slave_open_temp_tables                   | 0                    |  
| Slave_received_heartbeats                | 0                    |  
| Slave_retried_transactions               | 0                    |  
| Slave_running                            | OFF                  |  
| Slow_launch_threads                      | 30                   |  
| Slow_queries                             | 0                    |  
| Sort_merge_passes                        | 0                    |  
| Sort_range                               | 0                    |  
| Sort_rows                                | 0                    |  
| Sort_scan                                | 0                    |  
| Ssl_accept_renegotiates                  | 0                    |  
| Ssl_accepts                              | 0                    |  
| Ssl_callback_cache_hits                  | 0                    |  
| Ssl_cipher                               |                      |  
| Ssl_cipher_list                          |                      |  
| Ssl_client_connects                      | 0                    |  
| Ssl_connect_renegotiates                 | 0                    |  
| Ssl_ctx_verify_depth                     | 0                    |  
| Ssl_ctx_verify_mode                      | 0                    |  
| Ssl_default_timeout                      | 0                    |  
| Ssl_finished_accepts                     | 0                    |  
| Ssl_finished_connects                    | 0                    |  
| Ssl_session_cache_hits                   | 0                    |  
| Ssl_session_cache_misses                 | 0                    |  
| Ssl_session_cache_mode                   | NONE                 |  
| Ssl_session_cache_overflows              | 0                    |  
| Ssl_session_cache_size                   | 0                    |  
| Ssl_session_cache_timeouts               | 0                    |  
| Ssl_sessions_reused                      | 0                    |  
| Ssl_used_session_cache_entries           | 0                    |  
| Ssl_verify_depth                         | 0                    |  
| Ssl_verify_mode                          | 0                    |  
| Ssl_version                              |                      |  
| Table_locks_immediate                    | 13127661             |  
| Table_locks_waited                       | 648                  |  
| Tc_log_max_pages_used                    | 0                    |  
| Tc_log_page_size                         | 0                    |  
| Tc_log_page_waits                        | 6                    |  
| Threads_cached                           | 7                    |  
| Threads_connected                        | 2                    |  
| Threads_created                          | 54593                |  
| Threads_running                          | 2                    |  
| Uptime                                   | 651324               |  
| Uptime_since_flush_status                | 651324               |  
+------------------------------------------+----------------------+  
312 rows in set (0.01 sec)  
Aborted_clients 由于客户没有正确关闭连接已经死掉,已经放弃的连接数量。 
Aborted_connects 尝试已经失败的MySQL服务器的连接的次数。 
Connections 试图连接MySQL服务器的次数。 
Created_tmp_tables 当执行语句时,已经被创造了的隐含临时表的数量。 
Delayed_insert_threads 正在使用的延迟插入处理器线程的数量。 
Delayed_writes 用INSERT DELAYED写入的行数。 
Delayed_errors 用INSERT DELAYED写入的发生某些错误(可能重复键值)的行数。 
Flush_commands 执行FLUSH命令的次数。 
Handler_delete 请求从一张表中删除行的次数。 
Handler_read_first 请求读入表中第一行的次数。 
Handler_read_key 请求数字基于键读行。 
Handler_read_next 请求读入基于一个键的一行的次数。 
Handler_read_rnd 请求读入基于一个固定位置的一行的次数。 
Handler_update 请求更新表中一行的次数。 
Handler_write 请求向表中插入一行的次数。 
Key_blocks_used 用于关键字缓存的块的数量。 
Key_read_requests 请求从缓存读入一个键值的次数。 
Key_reads 从磁盘物理读入一个键值的次数。 
Key_write_requests 请求将一个关键字块写入缓存次数。 
Key_writes 将一个键值块物理写入磁盘的次数。 
Max_used_connections 同时使用的连接的最大数目。 
Not_flushed_key_blocks 在键缓存中已经改变但是还没被清空到磁盘上的键块。 
Not_flushed_delayed_rows 在INSERT DELAY队列中等待写入的行的数量。 
Open_tables 打开表的数量。 
Open_files 打开文件的数量。 
Open_streams 打开流的数量(主要用于日志记载) 
Opened_tables 已经打开的表的数量。 
Questions 发往服务器的查询的数量。 
Slow_queries 要花超过long_query_time时间的查询数量。 
Threads_connected 当前打开的连接的数量。 
Threads_running 不在睡眠的线程数量。 

Uptime 服务器工作了多少秒。

 

 

查看配置参数:

SHOW VARIABLES LIKE ‘%timeout%‘

Variable_name                                      Value                                                                                                                     
-------------------------------------------------  ------------------------------------------------------------------------------------------------------------------------  
auto_increment_increment                           1                                                                                                                         
auto_increment_offset                              1                                                                                                                         
autocommit                                         ON                                                                                                                        
automatic_sp_privileges                            ON                                                                                                                        
back_log                                           384                                                                                                                       
basedir                                            /usr                                                                                                                      
big_tables                                         OFF                                                                                                                       
binlog_cache_size                                  1048576                                                                                                                   
binlog_direct_non_transactional_updates            OFF                                                                                                                       
binlog_format                                      MIXED                                                                                                                     
binlog_stmt_cache_size                             32768                                                                                                                     
bulk_insert_buffer_size                            67108864                                                                                                                  
character_set_client                               utf8                                                                                                                      
character_set_connection                           utf8                                                                                                                      
character_set_database                             utf8                                                                                                                      
character_set_filesystem                           binary                                                                                                                    
character_set_results                              utf8                                                                                                                      
character_set_server                               utf8                                                                                                                      
character_set_system                               utf8                                                                                                                      
character_sets_dir                                 /usr/share/mysql/charsets/                                                                                                
collation_connection                               utf8_general_ci                                                                                                           
collation_database                                 utf8_general_ci                                                                                                           
collation_server                                   utf8_general_ci                                                                                                           
completion_type                                    NO_CHAIN                                                                                                                  
concurrent_insert                                  AUTO                                                                                                                      
connect_timeout                                    10                                                                                                                        
datadir                                            /var/lib/mysql/                                                                                                           
date_format                                        %Y-%m-%d                                                                                                                  
datetime_format                                    %Y-%m-%d %H:%i:%s                                                                                                         
default_storage_engine                             InnoDB                                                                                                                    
default_week_format                                0                                                                                                                         
delay_key_write                                    ON                                                                                                                        
delayed_insert_limit                               100                                                                                                                       
delayed_insert_timeout                             300                                                                                                                       
delayed_queue_size                                 1000                                                                                                                      
div_precision_increment                            4                                                                                                                         
engine_condition_pushdown                          ON                                                                                                                        
error_count                                        0                                                                                                                         
event_scheduler                                    OFF                                                                                                                       
expire_logs_days                                   30                                                                                                                        
external_user                                                                                                                                                                
flush                                              OFF                                                                                                                       
flush_time                                         0                                                                                                                         
foreign_key_checks                                 ON                                                                                                                        
ft_boolean_syntax                                  + -><()~*:""&|                                                                                                            
ft_max_word_len                                    84                                                                                                                        
ft_min_word_len                                    4                                                                                                                         
ft_query_expansion_limit                           20                                                                                                                        
ft_stopword_file                                   (built-in)                                                                                                                
general_log                                        OFF                                                                                                                       
general_log_file                                   /var/lib/mysql/VM84.log                                                                                                   
group_concat_max_len                               1024                                                                                                                      
have_compress                                      YES                                                                                                                       
have_crypt                                         YES                                                                                                                       
have_csv                                           YES                                                                                                                       
have_dynamic_loading                               YES                                                                                                                       
have_geometry                                      YES                                                                                                                       
have_innodb                                        YES                                                                                                                       
have_ndbcluster                                    NO                                                                                                                        
have_openssl                                       DISABLED                                                                                                                  
have_partitioning                                  YES                                                                                                                       
have_profiling                                     YES                                                                                                                       
have_query_cache                                   YES                                                                                                                       
have_rtree_keys                                    YES                                                                                                                       
have_ssl                                           DISABLED                                                                                                                  
have_symlink                                       YES                                                                                                                       
hostname                                           VM84                                                                                                                      
identity                                           0                                                                                                                         
ignore_builtin_innodb                              OFF                                                                                                                       
init_connect                                                                                                                                                                 
init_file                                                                                                                                                                    
init_slave                                                                                                                                                                   
innodb_adaptive_flushing                           ON                                                                                                                        
innodb_adaptive_hash_index                         ON                                                                                                                        
innodb_additional_mem_pool_size                    16777216                                                                                                                  
innodb_autoextend_increment                        8                                                                                                                         
innodb_autoinc_lock_mode                           1                                                                                                                         
innodb_buffer_pool_instances                       1                                                                                                                         
innodb_buffer_pool_size                            4294967296                                                                                                                
innodb_change_buffering                            all                                                                                                                       
innodb_checksums                                   ON                                                                                                                        
innodb_commit_concurrency                          0                                                                                                                         
innodb_concurrency_tickets                         500                                                                                                                       
innodb_data_file_path                              ibdata1:10M:autoextend                                                                                                    
innodb_data_home_dir                                                                                                                                                         
innodb_doublewrite                                 ON                                                                                                                        
innodb_fast_shutdown                               1                                                                                                                         
innodb_file_format                                 Antelope                                                                                                                  
innodb_file_format_check                           ON                                                                                                                        
innodb_file_format_max                             Antelope                                                                                                                  
innodb_file_per_table                              ON                                                                                                                        
innodb_flush_log_at_trx_commit                     2                                                                                                                         
innodb_flush_method                                                                                                                                                          
innodb_force_load_corrupted                        OFF                                                                                                                       
innodb_force_recovery                              0                                                                                                                         
innodb_io_capacity                                 200                                                                                                                       
innodb_large_prefix                                OFF                                                                                                                       
innodb_lock_wait_timeout                           50                                                                                                                        
innodb_locks_unsafe_for_binlog                     OFF                                                                                                                       
innodb_log_buffer_size                             16777216                                                                                                                  
innodb_log_file_size                               536870912                                                                                                                 
innodb_log_files_in_group                          2                                                                                                                         
innodb_log_group_home_dir                          ./                                                                                                                        
innodb_max_dirty_pages_pct                         75                                                                                                                        
innodb_max_purge_lag                               0                                                                                                                         
innodb_mirrored_log_groups                         1                                                                                                                         
innodb_old_blocks_pct                              37                                                                                                                        
innodb_old_blocks_time                             0                                                                                                                         
innodb_open_files                                  300                                                                                                                       
innodb_print_all_deadlocks                         OFF                                                                                                                       
innodb_purge_batch_size                            20                                                                                                                        
innodb_purge_threads                               0                                                                                                                         
innodb_random_read_ahead                           OFF                                                                                                                       
innodb_read_ahead_threshold                        56                                                                                                                        
innodb_read_io_threads                             4                                                                                                                         
innodb_replication_delay                           0                                                                                                                         
innodb_rollback_on_timeout                         OFF                                                                                                                       
innodb_rollback_segments                           128                                                                                                                       
innodb_spin_wait_delay                             6                                                                                                                         
innodb_stats_method                                nulls_equal                                                                                                               
innodb_stats_on_metadata                           ON                                                                                                                        
innodb_stats_sample_pages                          8                                                                                                                         
innodb_strict_mode                                 OFF                                                                                                                       
innodb_support_xa                                  ON                                                                                                                        
innodb_sync_spin_loops                             30                                                                                                                        
innodb_table_locks                                 ON                                                                                                                        
innodb_thread_concurrency                          0                                                                                                                         
innodb_thread_sleep_delay                          10000                                                                                                                     
innodb_use_native_aio                              ON                                                                                                                        
innodb_use_sys_malloc                              ON                                                                                                                        
innodb_version                                     5.5.36                                                                                                                    
innodb_write_io_threads                            4                                                                                                                         
insert_id                                          0                                                                                                                         
interactive_timeout                                300                                                                                                                       
join_buffer_size                                   8388608                                                                                                                   
keep_files_on_create                               OFF                                                                                                                       
key_buffer_size                                    33554432                                                                                                                  
key_cache_age_threshold                            300                                                                                                                       
key_cache_block_size                               1024                                                                                                                      
key_cache_division_limit                           100                                                                                                                       
large_files_support                                ON                                                                                                                        
large_page_size                                    0                                                                                                                         
large_pages                                        OFF                                                                                                                       
last_insert_id                                     0                                                                                                                         
lc_messages                                        en_US                                                                                                                     
lc_messages_dir                                    /usr/share/mysql/                                                                                                         
lc_time_names                                      en_US                                                                                                                     
license                                            GPL                                                                                                                       
local_infile                                       ON                                                                                                                        
lock_wait_timeout                                  31536000                                                                                                                  
locked_in_memory                                   OFF                                                                                                                       
log                                                OFF                                                                                                                       
log_bin                                            ON                                                                                                                        
log_bin_trust_function_creators                    OFF                                                                                                                       
log_error                                          /var/lib/mysql/VM84.err                                                                                                   
log_output                                         FILE                                                                                                                      
log_queries_not_using_indexes                      OFF                                                                                                                       
log_slave_updates                                  OFF                                                                                                                       
log_slow_queries                                   ON                                                                                                                        
log_warnings                                       1                                                                                                                         
long_query_time                                    2.000000                                                                                                                  
low_priority_updates                               OFF                                                                                                                       
lower_case_file_system                             OFF                                                                                                                       
lower_case_table_names                             0                                                                                                                         
max_allowed_packet                                 16777216                                                                                                                  
max_binlog_cache_size                              18446744073709547520                                                                                                      
max_binlog_size                                    1073741824                                                                                                                
max_binlog_stmt_cache_size                         18446744073709547520                                                                                                      
max_connect_errors                                 1024                                                                                                                      
max_connections                                    2048                                                                                                                      
max_delayed_threads                                20                                                                                                                        
max_error_count                                    64                                                                                                                        
max_heap_table_size                                67108864                                                                                                                  
max_insert_delayed_threads                         20                                                                                                                        
max_join_size                                      18446744073709551615                                                                                                      
max_length_for_sort_data                           1024                                                                                                                      
max_long_data_size                                 16777216                                                                                                                  
max_prepared_stmt_count                            16382                                                                                                                     
max_relay_log_size                                 0                                                                                                                         
max_seeks_for_key                                  18446744073709551615                                                                                                      
max_sort_length                                    1024                                                                                                                      
max_sp_recursion_depth                             0                                                                                                                         
max_tmp_tables                                     32                                                                                                                        
max_user_connections                               0                                                                                                                         
max_write_lock_count                               18446744073709551615                                                                                                      
metadata_locks_cache_size                          1024                                                                                                                      
min_examined_row_limit                             0                                                                                                                         
multi_range_count                                  256                                                                                                                       
myisam_data_pointer_size                           6                                                                                                                         
myisam_max_sort_file_size                          21474836480                                                                                                               
myisam_mmap_size                                   18446744073709551615                                                                                                      
myisam_recover_options                             DEFAULT                                                                                                                   
myisam_repair_threads                              1                                                                                                                         
myisam_sort_buffer_size                            536870912                                                                                                                 
myisam_stats_method                                nulls_unequal                                                                                                             
myisam_use_mmap                                    OFF                                                                                                                       
net_buffer_length                                  16384                                                                                                                     
net_read_timeout                                   30                                                                                                                        
net_retry_count                                    10                                                                                                                        
net_write_timeout                                  60                                                                                                                        
new                                                OFF                                                                                                                       
old                                                OFF                                                                                                                       
old_alter_table                                    OFF                                                                                                                       
old_passwords                                      OFF                                                                                                                       
open_files_limit                                   65535                                                                                                                     
optimizer_prune_level                              1                                                                                                                         
optimizer_search_depth                             62                                                                                                                        
optimizer_switch                                   index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,engine_condition_pushdown=on    
performance_schema                                 OFF                                                                                                                       
performance_schema_events_waits_history_long_size  10000                                                                                                                     
performance_schema_events_waits_history_size       10                                                                                                                        
performance_schema_max_cond_classes                80                                                                                                                        
performance_schema_max_cond_instances              1000                                                                                                                      
performance_schema_max_file_classes                50                                                                                                                        
performance_schema_max_file_handles                32768                                                                                                                     
performance_schema_max_file_instances              10000                                                                                                                     
performance_schema_max_mutex_classes               200                                                                                                                       
performance_schema_max_mutex_instances             1000000                                                                                                                   
performance_schema_max_rwlock_classes              30                                                                                                                        
performance_schema_max_rwlock_instances            1000000                                                                                                                   
performance_schema_max_table_handles               100000                                                                                                                    
performance_schema_max_table_instances             50000                                                                                                                     
performance_schema_max_thread_classes              50                                                                                                                        
performance_schema_max_thread_instances            1000                                                                                                                      
pid_file                                           /var/run/mysqld/mysqld.pid                                                                                                
plugin_dir                                         /usr/lib64/mysql/plugin/                                                                                                  
port                                               3306                                                                                                                      
preload_buffer_size                                32768                                                                                                                     
profiling                                          OFF                                                                                                                       
profiling_history_size                             15                                                                                                                        
protocol_version                                   10                                                                                                                        
proxy_user                                                                                                                                                                   
pseudo_slave_mode                                  OFF                                                                                                                       
pseudo_thread_id                                   2634591                                                                                                                   
query_alloc_block_size                             8192                                                                                                                      
query_cache_limit                                  2097152                                                                                                                   
query_cache_min_res_unit                           4096                                                                                                                      
query_cache_size                                   67108864                                                                                                                  
query_cache_type                                   ON                                                                                                                        
query_cache_wlock_invalidate                       OFF                                                                                                                       
query_prealloc_size                                8192                                                                                                                      
rand_seed1                                         0                                                                                                                         
rand_seed2                                         0                                                                                                                         
range_alloc_block_size                             4096                                                                                                                      
read_buffer_size                                   2097152                                                                                                                   
read_only                                          OFF                                                                                                                       
read_rnd_buffer_size                               16777216                                                                                                                  
relay_log                                                                                                                                                                    
relay_log_index                                                                                                                                                              
relay_log_info_file                                relay-log.info                                                                                                            
relay_log_purge                                    ON                                                                                                                        
relay_log_recovery                                 OFF                                                                                                                       
relay_log_space_limit                              0                                                                                                                         
report_host                                                                                                                                                                  
report_password                                                                                                                                                              
report_port                                        3306                                                                                                                      
report_user                                                                                                                                                                  
rpl_recovery_rank                                  0                                                                                                                         
secure_auth                                        OFF                                                                                                                       
secure_file_priv                                                                                                                                                             
server_id                                          84                                                                                                                        
skip_external_locking                              ON                                                                                                                        
skip_name_resolve                                  ON                                                                                                                        
skip_networking                                    OFF                                                                                                                       
skip_show_database                                 OFF                                                                                                                       
slave_compressed_protocol                          OFF                                                                                                                       
slave_exec_mode                                    STRICT                                                                                                                    
slave_load_tmpdir                                  /tmp                                                                                                                      
slave_max_allowed_packet                           1073741824                                                                                                                
slave_net_timeout                                  3600                                                                                                                      
slave_skip_errors                                  1032,1062                                                                                                                 
slave_transaction_retries                          10                                                                                                                        
slave_type_conversions                                                                                                                                                       
slow_launch_time                                   2                                                                                                                         
slow_query_log                                     ON                                                                                                                        
slow_query_log_file                                /var/lib/mysql/VM84-slow.log                                                                                              
socket                                             /var/lib/mysql/mysql.sock                                                                                                 
sort_buffer_size                                   8388608                                                                                                                   
sql_auto_is_null                                   OFF                                                                                                                       
sql_big_selects                                    ON                                                                                                                        
sql_big_tables                                     OFF                                                                                                                       
sql_buffer_result                                  OFF                                                                                                                       
sql_log_bin                                        ON                                                                                                                        
sql_log_off                                        OFF                                                                                                                       
sql_low_priority_updates                           OFF                                                                                                                       
sql_max_join_size                                  18446744073709551615                                                                                                      
sql_mode                                                                                                                                                                     
sql_notes                                          ON                                                                                                                        
sql_quote_show_create                              ON                                                                                                                        
sql_safe_updates                                   OFF                                                                                                                       
sql_select_limit                                   18446744073709551615                                                                                                      
sql_slave_skip_counter                             0                                                                                                                         
sql_warnings                                       OFF                                                                                                                       
ssl_ca                                                                                                                                                                       
ssl_capath                                                                                                                                                                   
ssl_cert                                                                                                                                                                     
ssl_cipher                                                                                                                                                                   
ssl_key                                                                                                                                                                      
storage_engine                                     InnoDB                                                                                                                    
stored_program_cache                               256                                                                                                                       
sync_binlog                                        0                                                                                                                         
sync_frm                                           ON                                                                                                                        
sync_master_info                                   0                                                                                                                         
sync_relay_log                                     0                                                                                                                         
sync_relay_log_info                                0                                                                                                                         
system_time_zone                                   CST                                                                                                                       
table_definition_cache                             400                                                                                                                       
table_open_cache                                   2048                                                                                                                      
thread_cache_size                                  8                                                                                                                         
thread_concurrency                                 16                                                                                                                        
thread_handling                                    one-thread-per-connection                                                                                                 
thread_stack                                       262144                                                                                                                    
time_format                                        %H:%i:%s                                                                                                                  
time_zone                                          SYSTEM                                                                                                                    
timed_mutexes                                      OFF                                                                                                                       
timestamp                                          1408104399                                                                                                                
tmp_table_size                                     67108864                                                                                                                  
tmpdir                                             /tmp                                                                                                                      
transaction_alloc_block_size                       8192                                                                                                                      
transaction_prealloc_size                          4096                                                                                                                      
tx_isolation                                       REPEATABLE-READ                                                                                                           
unique_checks                                      ON                                                                                                                        
updatable_views_with_limit                         YES                                                                                                                       
version                                            5.5.36-log                                                                                                                
version_comment                                    MySQL Community Server (GPL) by Remi                                                                                      
version_compile_machine                            x86_64                                                                                                                    
version_compile_os                                 Linux                                                                                                                     
wait_timeout                                       28800                                                                                                                     
warning_count                                      0        

 

mysql show processlist命令 详解