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Bug 7307972  Excessive waits on 'library cache: mutex x'

 This note gives a brief overview of bug 7307972. 
 The content was last updated on: 18-NOV-2010
  Click here for details of each of the sections below.

Affects:

Product (Component)Oracle Server (Rdbms)
Range of versions believed to be affectedVersions BELOW 11.2.0.1
Versions confirmed as being affected
  • 11.1.0.7
Platforms affectedGeneric (all / most platforms affected)

Fixed:

This issue is fixed in
  • 11.2.0.1 (Base Release)
  • 11.1.0.7.2 (Patch Set Update)
  • 11.1.0.7 Patch 22 on Windows Platforms

Symptoms:

Related To:

  • Mutex Contention
  • Performance Affected (General)
  • Waits for "library cache: mutex X"
  • (None Specified)

Description

The wait event "library cache: mutex X" might be seen when there is high
concurrent access to a specific object. 
The code path associated with V$MUTEX_SLEEP_[HISTORY].LOCATION = "kglpin1   4" 
has been optimized.

Please note: The above is a summary description only. Actual symptoms can vary. Matching to any symptoms here does not confirm that you are encountering this problem. For questions about this bug please consult Oracle Support.

References

Bug:7307972 (This link will only work for PUBLISHED bugs)
Note:245840.1 Information on the sections in this article
 
 

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