latch row cache objects 等待事件 说明

Row Cache Objects:

The row cache objects latch contention usually means there is contention in the data dictionary. This problem may also be a symptom of excessive parsing of SQL statements that depend on public synonyms. Increasing the shared pool usually solves this latch problem.

You usually increase the shared pool for a library cache latch problem well before this one is a problem.

根据上面的这段蚊子说明， 增大shared pool 通常可以解决这种latch 问题。 不过具体情况还是需要具体对待，可以做HANGANALYZE和SYSTEM STATE DUMP来帮助定位为题。 参考：

Oracle oradebug 命令 使用说明

http://blog.csdn.net/tianlesoftware/archive/2011/06/04/6525628.aspx

Oracle HANGANALYZE 功能诊断 DB hanging

http://blog.csdn.net/tianlesoftware/archive/2011/04/13/6321961.aspx

-------------------------------------------------------------------------------------------------------

Blog： http://blog.csdn.net/tianlesoftware

Email: [email protected]

DBA1 群：62697716(满); DBA2 群：62697977(满) DBA3 群：62697850(满)

DBA 超级群：63306533(满); DBA4 群： 83829929 DBA5群： 142216823

DBA6 群：158654907 聊天 群：40132017 聊天2群：69087192

--加群需要在备注说明Oracle表空间和数据文件的关系，否则拒绝申请