这两个等待事件其实很少出现在top5列表中,一般都没什么印象,在此整理记录以便以后查阅. 常见的library cache lock产生的原因在<高级OWI与Oracle性能调查>这本书和下面这个文档中有一般性的描述: Troubleshooting Library Cache: Lock, Pin and Load Lock (Doc ID 444560.1) 一般可以理解的是alter table或者alter package/procedure会以X模式持有library cache l…

转自:http://blog.itpub.net/26736162/viewspace-2139754/   定位的办法: --查询row cache lock等待 select event,p1  from v$session where  event= 'row cache lock' and status='ACTIVE';   --查询rowcache 名称 select * from v$rowcache where cache# =p1; 名称 P1 P2 P3 原因 处理 row …

http://www.dadbm.com/database-hang-row-cache-lock-concurrency-troubleshooting/ Issue backgroundThis post will help to analyze Oracle database instance slowdown that can happen due to considerable row cache lock (enqueue) wait events. It’s is based on…

[等待事件]序列等待事件总结(enq: SQ - contention.row cache lock.DFS lock handle和enq: SV -  contention) 1  BLOG文档结构图 2  前言部分 2.1  导读和注意事项 各位技术爱好者,看完本文后,你可以掌握如下的技能,也可以学到一些其它你所不知道的知识,~O(∩_∩)O~: ① 序列等待事件总结 ② enq: SQ - contention.row cache lock.DFS lock handle和enq: SV…

SQL> col name format a30 SQL> select * from (select SAMPLE_TIME, SESSION_ID, NAME, P1, P2, P3, ash.BLOCKING_SESSION from v$active_session_history ash, v$event_name enm where ash.event# = enm.event# and enm.NAME='row cache lock') where rownum<10;…

Sessions Hang on "row cache lock" (dc_objects) While Creating & Dropping a Table Concurrently (文档 ID 2319957.1) The cause is due to following bug which was closed as not a bug: Bug 25641559- ROW CACHE LOCK WITHOUT HOLDER "row cache lock…

Bug 7715339 - Logon failures causes "row cache lock" waits - Allow disable of logon delay (文档 ID 7715339.8) 究竟部  改动时间:2012-7-26类型:PATCH  为此文档评级 通过电子邮件发送此文档的链接 在新窗体中打开文档 可打印页 Bug 7715339  Logon failures causes "row cache lock" waits - A…

 Eclipse项目导入Android Stuio 配置出现 Error:Timeout waiting to lock buildscript class cache for build file 'H:\studioproject\Generic_SN\build.gradle' (C:\Users\Administrator\.gradle\caches\2.2.1\scripts\build_81ep6udn3nlzszbotl32uedjz\ProjectScript\buildscr…

跑单测用例的时候,以前执行成功的用例,运行时控制台仍然会报 dubbo 相关的错误: Failed to save registry store file, cause: Can not lock the registry cache file 2016-03-22 17:16:05,493 [DubboSaveRegistryCache-thread-1] WARN  com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry -  [DUBB…

问题 在Ubuntu中,执行apt install后,出现以下问题: Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 3365 (unattended-upgr) 看着描述就是有3365的进程进行占用了source文件. 解决办法: 删除锁定的文件 rm /var/lib/dpkg/lock 实在没办法解除,直接进行干掉进程. kill -9 3365 注意…