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Troubleshooting Connected to an idle instance, But Instance is running

  • 2018/09/30
  • ORACLE 9i-23ai
  • 725 views
  • Troubleshooting Connected to an idle instance, But Instance is running已关闭评论

前几日有朋友遇到了这个问题，实例是启动的，但是经常过一段时间连接数据库实例时提示”Connected to an idle instance”，环境：RAC oracle 11.2.0.4.0 操作系统RHEL 6.5。

[oracle@anbob1 trace]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Wed Sep 19 20:27:51 2018
Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.
Errors in file /s01/oracle/app/oracle/diag/rdbms/anbob/ANBOB1/trace/ANBOB1_cjq0_14004.trc:
Process J000 died, see its trace file
kkjcre1p: unable to spawn jobq slave process
Errors in file /s01/oracle/app/oracle/diag/rdbms/anbob/ANBOB1/trace/ANBOB1_cjq0_14004.trc:
Process J000 died, see its trace file

Trace file SHOW

*** 2018-09-19 19:10:02.211
Process J000 is dead (pid=6055 req_ver=46668 cur_ver=46668 state=KSOSP_SPAWNED).

*** 2018-09-19 19:10:04.216
Process J000 is dead (pid=6060 req_ver=46669 cur_ver=46669 state=KSOSP_SPAWNED).

*** 2018-09-19 19:10:06.220
Process J000 is dead (pid=6068 req_ver=46670 cur_ver=46670 state=KSOSP_SPAWNED).

*** 2018-09-19 19:10:08.214
Process J000 is dead (pid=6079 req_ver=46671 cur_ver=46671 state=KSOSP_SPAWNED).
...

分析需要的数据：

$ env|grep ORA
$ ps -ef|grep smon
$ cat /etc/sysctl.conf
$ ulimit -a
$ cat /etc/security/limits.conf
$ cat /proc/meminfo 
$ ipcs -m  or ipcs -mob
$ sysresv
$ df 
# or truss 
$ strace -a -e -f -tt -o connect.out sqlplus "/as sysdba"

从pfile或正常时的参数信息
SQL> show parameter mem
SQL> show parameter ga
SQL> show parameter job
SQL> select * from gv$resource_limit

可能的原因:
1. OS资源限制
2. Memory 或SWAP 不足
3. Memory_target Enabled
4. job_queue_processes参数不合理
5. Oracle Bugs. e.g. 24921392

通常是因为操作系统限制或内核参数限制导致实例分享的共享内存段丢失，但进程还在的现象。

如果您解决不了，可以联系我们。

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