WebMay 12, 2024 · Significant time is spent waiting for 'cursor: pin S wait on X' (and possibly high ' library cache lock ' and ' cursor: pin S ' waits as well) Average wait time is high. Top 10 waits in an AWR report might look similar to the following: A large number of captured plans can be seen in the dba_sql_plan_baselines view or in the SQLT report. WebAug 9, 2012 · Since Wait Event “cursor: pin S wait on X” tell us that session is waiting to put cursor mutex in S Mode but it is already held in e (X)clusive mode …. It will be useful to know the reason for “hard …
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Webcursor: mutex S; cursor: mutex X; cursor: pin S; cursor: pin S wait on X; cursor: pin X; Data Guard: process clean up; Data Guard: process exit; Data Guard Broker: single instance; db file parallel read; db file parallel write; db file scattered read; db file sequential read; db file single write; DFS db file lock; DFS lock handle; direct path ... WebMar 25, 2010 · 3.5cursor: pin S wait on X 4Row Cache 4.1latch: row cache objects 4.2row cache lock Library cache latches Protects changes in Library Cache Library Locks are not atomic Thus need library cache latch Broken out into library cache pin allocation library cache lock allocation library cache lock library cache library cache pin library cache … debella vanadium project
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WebJan 16, 2015 · cursor: pin S wait on X By bpeaslandin Oracle, RAC, Tuning On my main production RAC database, I do see periods of slowness and the dominant wait event, system wide, is “cursor: pin S wait on X”. The event comes and goes, but I do see it from time to time. So I needed to get the bottom of this. Note, that this is not a RAC problem. WebAug 27, 2024 · What is a 'Cursor: pin S wait on X' wait? A cursor wait is associated with parsing in some form. A session may wait for this event when it is trying to get a mutex pin in Share mode but another session is holding the mutex pin on the same cursor object in exclusive. Frequently, waits for 'Cursor: pin S wait on X' is a symptom and not the cause. http://www.peasland.net/2015/01/16/cursor-pin-s-wait-on-x/ debate project