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ASM session hang waiting for PGA memory operation (Doc ID 2288973.1)

Last updated on DECEMBER 27, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 to 12.2.0.1 [Release 11.2 to 12.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.

Symptoms


Queries to V$ASM_DISKGROUP & V$ASM_DISK were hanging 

ASM session hung waiting for "PGA memory operation" 

Issue started after creating ACFS volume

- ASM instance is started
- Hang while executing the below query

             --> select name, compatibility, database_compatibility from v$asm_diskgroup;


Session wait event:
1099 PGA memory operation ash8vj2xng1s1 ACTIVE WAITED SHORT TIME


Cause

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In this Document
Symptoms
Cause
Solution
References


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