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Excessive Waits On The Event "Global transaction acquire instance locks" in AWR (Doc ID 804426.1)

Last updated on MARCH 07, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 11.1.0.6 to 11.1.0.7 [Release 11.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

RAC database performance is slow.

The AWR, Top 5 wait event shows event : "Global transaction acquire ins".

 

Top 5 Timed Foreground Events
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                               Avg
                               wait %       DB
Event Waits                    Time(s)      (ms)      
------------------------------ ------------ -----------
Global transaction acquire ins 162,962,601 1,866,261   

...

 

 
 

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References

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