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Troubleshooting 'library cache: mutex X' Waits. (Doc ID 1357946.1)

Last updated on MARCH 25, 2020

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.


The purpose of the article is to help troubleshoot contention for the wait event 'library cache: mutex X'.

Troubleshooting Steps

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In this Document
Troubleshooting Steps
 What is a 'library cache: mutex X' wait?
 What causes 'library cache: mutex X' wait?
 Name of events in 12c and higher
 How to diagnose the cause.
 How to Examine the Diagnostics.
 Potential Solutions
 Troubleshooting heavy contention for 'library cache: mutex X' waits for 11g and later

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