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

Last updated on AUGUST 24, 2010

Applies to:

Oracle Server - Enterprise Edition - Version: 11.1.0.6 to 11.1.0.7 - Release: 11.1 to 11.1
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   

...



Cause

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