ASM session hang waiting for PGA memory operation
(Doc ID 2288973.1)
Last updated on MARCH 29, 2024
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 |