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ORA-00445 实例挂起

2024-07-18 14:14:59   216人阅读

现象：
节点2 运行：select sum(bytes) from dba_segments 长期等待： waiting for ‘gc cr request‘
节点1 僵死：select sid,serial# from gv$session where username=‘****‘
 
分析：  
数据库内部等待关系：
blocking    blocker    event            
388         773,397    enq: PV - syncstart
773         397        enq: PR - contention
397                    enq: PR - contention  os thread startup：ora-445


--1 
节点1 运行语句select sid,serial# from gv$session where username=‘WANQIONG‘:
失败的原因：PROCESS 53/57 两个会话运行该语句,PROCESS 20: CKPT block这两个会话
            PROCESS 20 由于waiting for ‘enq: PR - contention‘ name|mode=0x50520006 
            0x50520006 所有者：PROCESS 45: CJQ0
            根据：awk -f ass109.awk calldb1_ora_15639.trc  分析：
                                Resource Holder State
            Enqueue PR-00000000-00000000    45: 0: waiting for ‘os thread startup‘
            Enqueue PV-00000000-00000000    38: 38: is waiting for 45:
            Latch 380030bc0    ??? Blocker
            PROCESS 45: CJQ0 进程是罪魁祸首！该进程无法启动。
            
--2 节点2
节点2运行语句：select sum(bytes) from dba_segments，等待时间0: waiting for ‘gc cr request‘
               cssd,crsd没有发现明显节点通讯报错，怀疑由于节点1死机引起






--3  节点1 警告日志分析
Mon Aug 11 09:45:49 2014
Archived Log entry 58557 added for thread 1 sequence 27907 ID 0x4bcd9425 dest 1:
Mon Aug 11 16:08:44 2014
Errors in file /oracle/diag/rdbms/calldb/calldb1/trace/calldb1_cjq0_8914.trc  (incident=56362):
ORA-00445: background process "J000" did not start after 120 seconds
Incident details in: /oracle/diag/rdbms/calldb/calldb1/incident/incdir_56362/calldb1_cjq0_8914_i56362.trc
kkjcre1p: unable to spawn jobq slave process 
Errors in file /oracle/diag/rdbms/calldb/calldb1/trace/calldb1_cjq0_8914.trc:
Mon Aug 11 16:12:25 2014
Errors in file /oracle/diag/rdbms/calldb/calldb1/trace/calldb1_mmon_8497.trc  (incident=56202):
ORA-00445: background process "m000" did not start after 120 seconds
Incident details in: /oracle/diag/rdbms/calldb/calldb1/incident/incdir_56202/calldb1_mmon_8497_i56202.trc
Mon Aug 11 16:14:28 2014


awr分析内存16G 
Begin  End
Host Mem (MB):   15,744.0   15,744.0
SGA use (MB):   4,608.0   4,608.0
PGA use (MB):   462.5   460.1
% Host Mem used for SGA+PGA:   32.21   32.19


重启后内存12g
[oracle@calldb1 /home/oracle]$ prtconf | grep ‘Memory‘
Memory size: 12288 Megabytes


怀疑问题出在内存上：
1379200.1  根据文档可以确定：


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