合 【MOS】How to Determine the Blocking Session for Event 'cursor: pin S wait on X' (Doc ID 786507.1)

APPLIES TO:

Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.

GOAL

This note helps find the blocking session for mutex related wait event "cursor: pin S wait on X"

To Troubleshoot this event see:

Document 1377998.1 Troubleshooting: Waits for Mutex Type Events
Document 1349387.1 Troubleshooting 'cursor: pin S wait on X' waits

Document 1356828.1 FAQ: 'cursor: mutex ..' / 'cursor: pin ..' / 'library cache: mutex ..' Type Wait Events

Document 1377446.1 Troubleshooting Performance Issues

SOLUTION

Cursor: pin S wait on X.

A session waits on this event when requesting a mutex for shareable operations related to pins (such as executing a cursor), but the mutex cannot be granted because it is being held exclusively by another session (which is most likely parsing the cursor).

The column P2RAW in v$session or v$session_wait gives the blocking session for wait event cursor: pin S wait on X.

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