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Database hangs: "gc buffer busy acquire/release" and "gc current block busy" pointing to the tempfile block #2 (Doc ID 2192851.1)

Last updated on DECEMBER 10, 2023

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.


o 4-node RAC with a single 1TB size tempfile

o Sometimes query hangs with sessions waiting for 'gc' waits:


o 45 PQ slaves being used for the query, 12 on instances 1,2 and 3, and 9 slaves on instance 4.


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