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

Last updated on DECEMBER 20, 2022

Applies to:

Oracle Database - Enterprise Edition - Version to [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.


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


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