Oracle Blocking Sessionsoccur when one sessions holds an exclusive lock on an object and doesn’t release it before another sessions wants to update the same data. This will block the second until the first one has done its work.Blocking locksmainly happens when a session issues an insert, up...
show current session id select sid from v$mystat where rownum=1; show blocking session select blocking_session, sid, serial#, wait_class,seconds_in_wait fromv$sessionwhereblocking_session is not NULLorder byblocking_session;
--即session 1073,4642是堵塞者,后面2个session是被堵塞者 --Author : Leshami --Blog : http://blog.csdn.net/leshami --以下查询正在堵塞的session id,SQL语句以及被堵塞的时间 scott@CNMMBO> @blocking_session_detail.sql 'SID='||A.SID||'WAITCLASS='||A.WAIT_CLASS||'TIME='||A.SECONDS_IN_WA...
scott@CNMMBO>@blocking_session_detail.sql'SID='||A.SID||'WAITCLASS='||A.WAIT_CLASS||'TIME='||A.SECONDS_IN_WAIT||CHR(10)||'QUERY='||B.SQL_TEXT---sid=1067Wait Class=Application Time=5995Query=update scott.empsetsal=sal+100where empno=7788sid=1065Wait Class=Application Time=225Query...
--即session 1073,4642是阻塞者,后面2个session是被阻塞者 --author : leshami --blog : http://blog.csdn.net/leshami --下面查询正在阻塞的session id,sql语句以及被阻塞的时间 scott@cnmmbo> @blocking_session_detail.sql 'sid='||a.sid||'waitclass='||a.wait_class||'time='||a.seconds_in_wa...
二、演示堵塞: -更新表,注,提示符scottcnmmbo表明用户为scott的session,用户名不同,session不同。 scottcnmmbo update emp set sal=sal*1.1 where empno=7788; 1 row updated. scottcnmmbo 2、my_env spid sid serial# username program - - - - - 11205 1073 4642 robin oracleszdb (tns v1-v3) -...
51CTO博客已为您找到关于blocking session的相关内容,包含IT学习相关文档代码介绍、相关教程视频课程,以及blocking session问答内容。更多blocking session相关解答可以来51CTO博客参与分享和学习,帮助广大IT技术人实现成长和进步。
11205 1073 4642 robin oracle@SZDB (TNS V1-V3) --另起两个session更新同样的行,这两个session都会处于等待,直到第一个session提交或回滚 leshami@CNMMBO> update scott.emp set sal=sal+100 where empno=7788; goex_admin@CNMMBO> update scott.emp set sal=sal-50 where empno=7788; ...
The total DB time currently accumulated in this chain. Metric SummaryThe rest of the information in this section is only valid for this metric when it appears in either the Enterprise Manager Grid Control or the Enterprise Manager Database Control (if applicable).The following table shows how ...
RAC环境下的阻塞不同于单实例情形,因为我们需要考虑到位于不同实例的session。也就是说之前查询的v$session,v$lock相应的应变化为全局范围来查找。本文提供了2个查询脚本,并给出实例演示那些session为阻塞者,哪些为被阻塞者。有关阻塞的概念以及单实例环境下的阻塞请参考:Oracle 阻塞(blocking blocked) ...