11g等待事件之library cache: mutex X

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11g等待事件之library cache: mutex X

11g等待事件之library cache: mutex X 作者: dbafree 日期: 2012 年 07 月 01 日发表评论 (0)查看评论 library cache: mutex X替代了之前的library cache latch,主要作用是在hash bucket中定位handle时使用.(比如SQL硬解析时,需要往hash bucket中新增一个cursor时,需要library cache latch).如下图所示:文档上面的解释如下:The library cache…

[20190402]Library Cache mutex.txt

[20190402]Library Cache mutex.txt 1.环境:SCOTT@book> @ ver1PORT_STRING VERSION BANNER------------------------------ -------------- --------------------------------------------------------------------------------x86_64/Linux 2.…

library cache: mutex X

我们先来看看 library cache: mutex X . 是个什么东西 The library cache mutex is acquired for similar purposes that the library cache latches were acquired in prior versions of Oracle. In 10g, mutexes were introduced for certain operations in the library cache. Sta…

Troubleshooting 'library cache: mutex X' Waits. (Doc ID 1357946.1)

In this Document Purpose Troubleshooting Steps What is a 'library cache: mutex X' wait? What causes 'library cache: mutex X' wait? Name of events in 12c and higher How to diagnose the cause. How to Examine the Diagnostics. Potential S…

Oracle数据库大量library cache: mutex X及latch: shared pool问题排查一例

业务系统数据库夯住,数据库内大量的library cache: mutex X及latch: shared pool等待,alert日志信息如下 Tue Sep :: WARNING: inbound connection timed out (ORA-) Tue Sep :: WARNING: inbound connection timed out (ORA-) Tue Sep :: WARNING: inbound connection timed out (ORA-) Tue Sep :…

Troubleshooting 'library cache: mutex X' Waits.

What is a 'library cache: mutex X' wait? The mutex feature is a mechanism to control access to in memory structures. It is used in a number of areas including the library cache. The library cache is a memory area that holds parsed cursor structures n…