首页 > 代码库 > ORACLE 在线移动redo log路径、删除无效的redo log
ORACLE 在线移动redo log路径、删除无效的redo log
移动redo文件路径,默认的redo log文件的路径和archivelog的路径一样,在闪回区,因为闪回区有大小限制,所以redo log和archive log特别是archive log越来越多后,会撑爆闪回区。规范起见,需要将redo log以及archive log放到单独的路径区域里面去。
1,查看现有的redo文件路径
查看现有的redo文件路径,看到默认的在闪回区路径下面:
SQL> select member from v$logfile; MEMBER -------------------------------------------------------------------------------- /oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_3_dfkstobl_.log /oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_2_dfksto61_.log /oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_1_dfksto1q_.log /home/oradata/powerdes/redo_dg_021.log /home/oradata/powerdes/redo_dg_022.log MEMBER -------------------------------------------------------------------------------- /home/oradata/powerdes/redo_dg_023.log 6 rows selected. SQL>
2,关闭数据库,copy redo文件到新地址
关闭数据库后,copy文件:
SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> cp文件地址: [oracle@hch_test_dbm1_121_63 ~]$ mv /oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_3_dfkstobl_.log /home/oradata/powerdes/redo03.log [oracle@hch_test_dbm1_121_63 ~]$ mv /oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_2_dfksto61_.log /home/oradata/powerdes/redo02.log [oracle@hch_test_dbm1_121_63 ~]$ mv /oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_1_dfksto1q_.log /home/oradata/powerdes/redo01.log cp /home/oradata/powerdes/redo03.log /oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_3_dfkstobl_.log cp /home/oradata/powerdes/redo02.log /oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_2_dfkstobl_.log cp /home/oradata/powerdes/redo01.log /oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_1_dfkstobl_.log
3, 数据库启动mount,执行rename切换redo日志路径
执行命令: alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_3_dfkstobl_.log‘ to ‘/home/oradata/powerdes/redo03.log‘; alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_2_dfksto61_.log‘ to ‘/home/oradata/powerdes/redo02.log‘; alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_1_dfksto1q_.log‘ to ‘/home/oradata/powerdes/redo01.log‘; 执行报错 SQL> alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_3_dfkstobl_.log‘ to ‘/home/oradata/powerdes/redo03.log‘; alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_3_dfkstobl_.log‘ to ‘/home/oradata/powerdes/redo03.log‘ * ERROR at line 1: ORA-01511: error in renaming log/data files ORA-01275: Operation RENAME is not allowed if standby file management is automatic.
命令执行报错,提示说standbyfile maangement参数为自动,自动情况下不允许修改,好吧,听它的,修改成手动的,这样我们就可以移动它的目录地址了
SQL> show parameter standby; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ standby_archive_dest string ?/dbs/arch standby_file_management string AUTO SQL> alter system set standby_file_management = MANUAL; System altered. SQL> SQL> alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_3_dfkstobl_.log‘ to ‘/home/oradata/powerdes/redo03.log‘; Database altered. SQL>
执行第一个成功,但是执行第二个报错,记录如下:
SQL> alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_2_dfkstobl_.log‘ to ‘/home/oradata/powerdes/redo02.log‘; alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_2_dfkstobl_.log‘ to ‘/home/oradata/powerdes/redo02.log‘ * ERROR at line 1: ORA-01511: error in renaming log/data files ORA-01516: nonexistent log file, data file, or temporary file "/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_2_dfkstobl_. log" SQL> 看提示,这个文件non existstent log file,看是文件不存在,check下,修改成正确的文件名,再次执行。 再次执行 SQL> alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_2_dfksto61_.log‘ to ‘/home/oradata/powerdes/redo02.log‘; Database altered. SQL> alter database rename file ‘/oracle/app/oracle/flash_recovery_area/POWERDES_S1/onlinelog/o1_mf_1_dfksto1q_.log‘ to ‘/home/oradata/powerdes/redo01.log‘; Database altered. SQL>
4,检查查看当前路径:
SQL> show parameter db_file_name_convert; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_file_name_convert string SQL> SQL> select member from v$logfile; MEMBER -------------------------------------------------------------------------------- /home/oradata/powerdes/redo03.log /home/oradata/powerdes/redo02.log /home/oradata/powerdes/redo01.log /home/oradata/powerdes/redo_dg_021.log /home/oradata/powerdes/redo_dg_022.log /home/oradata/powerdes/redo_dg_023.log 6 rows selected. SQL> select name from v$datafile; NAME -------------------------------------------------------------------------------- /home/oradata/powerdes/system01.dbf /home/oradata/powerdes/sysaux01.dbf /home/oradata/powerdes/undotbs01.dbf /home/oradata/powerdes/users01.dbf /home/oradata/powerdes/powerdesk01.dbf /home/oradata/powerdes/plas01.dbf /home/oradata/powerdes/pl01.dbf /home/oradata/powerdes/help01.dbf /home/oradata/powerdes/adobelc01.dbf /home/oradata/powerdes/sms01.dbf /home/oradata/powerdes/plcrm01.dbf NAME -------------------------------------------------------------------------------- /home/oradata/powerdes/powerdesk02.dbf /home/oradata/powerdes/datagm01.dbf /home/oradata/powerdes/plimp01.DBF /home/oradata/powerdes/dwetl01.DBF /home/oradata/powerdes/dw02.DBF /home/oradata/powerdes/timdba01.DBF 17 rows selected. SQL>
重启查看新的路径是否生效
SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> startup mount; ORACLE instance started. Total System Global Area 2.6991E+10 bytes Fixed Size 2213976 bytes Variable Size 1.9059E+10 bytes Database Buffers 7784628224 bytes Redo Buffers 145174528 bytes Database mounted. SQL> SQL> select member from v$logfile; MEMBER -------------------------------------------------------------------------------- /home/oradata/powerdes/redo03.log /home/oradata/powerdes/redo02.log /home/oradata/powerdes/redo01.log /home/oradata/powerdes/redo_dg_021.log /home/oradata/powerdes/redo_dg_022.log /home/oradata/powerdes/redo_dg_023.log 6 rows selected. SQL>
5,清除多余的redo日志组
查看现在的日志文件
SQL> select * from v$log; GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC ---------- ---------- ---------- ---------- ---------- ---------- --- STATUS FIRST_CHANGE# FIRST_TIME NEXT_CHANGE# NEXT_TIME ---------------- ------------- ------------ ------------ ------------ 1 1 139 52428800 512 1 YES CURRENT 1.4120E+10 31-MAR-17 2.8147E+14 3 1 0 52428800 512 1 YES CLEARING 1.4120E+10 31-MAR-17 2.8147E+14 2 1 0 52428800 512 1 YES UNUSED 1.4120E+10 31-MAR-17 1.4120E+10 31-MAR-17 SQL>
查看现在的redo日志文件
SQL> select * from v$logfile; GROUP# STATUS TYPE ---------- ------- ------- MEMBER -------------------------------------------------------------------------------- IS_ --- 3 ONLINE /home/oradata/powerdes/redo01.log NO 2 ONLINE /home/oradata/powerdes/redo02.log NO GROUP# STATUS TYPE ---------- ------- ------- MEMBER -------------------------------------------------------------------------------- IS_ --- 1 ONLINE /home/oradata/powerdes/redo03.log NO 4 STANDBY /oracle/app/oracle/fast_recovery_area/POWERDES_S2/onlinelog/o1_mf_4_dfw3zf9v_.lo GROUP# STATUS TYPE ---------- ------- ------- MEMBER -------------------------------------------------------------------------------- IS_ --- g YES 5 STANDBY /oracle/app/oracle/fast_recovery_area/POWERDES_S2/onlinelog/o1_mf_5_dfw3zg5r_.lo g YES GROUP# STATUS TYPE ---------- ------- ------- MEMBER -------------------------------------------------------------------------------- IS_ --- 6 STANDBY /oracle/app/oracle/fast_recovery_area/POWERDES_S2/onlinelog/o1_mf_6_dfw3zh1q_.lo g YES 6 rows selected. SQL>
保守一些,select * from v$log;里面查不到的log文件,都可以删除掉;甚至彻底些不在CURRENT里面的,也可以删除掉。
SQL> alter database drop logfile group 5; Database altered. SQL> alter database drop logfile group; 6; Database altered. SQL> alter database drop logfile group 4; Database altered. SQL> check,已经删除了多余的redo文件 SQL> select member from v$logfile; MEMBER -------------------------------------------------------------------------------- /home/oradata/powerdes/redo01.log /home/oradata/powerdes/redo02.log /home/oradata/powerdes/redo03.log SQL>
ORACLE 在线移动redo log路径、删除无效的redo log
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