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Troubleshooting Databases Hang Due to Heavy Contention for 'library cache: mutex X' Waits (Oracle 11.2 and Later) (Doc ID 2051456.1)

Last updated on JULY 21, 2020

Applies to:

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

Purpose

Provides some basic information to enable DBAs to identify library cache mutex related problems and raises awareness on known issues and actions to be taken.

Troubleshooting Steps

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In this Document
Purpose
Troubleshooting Steps
 Identifying KGL mutex (library cache: mutex X) issues related to mutex recovery problems in 11.2.0.4
 Problem Synopsis
 How to Identify the pseudo-SID
 Workarounds
 Known Issues
 Patches
 
References

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