ORA-4031 Hit In Large Pool during RMAN backup (Doc ID 1286414.1)

Last updated on NOVEMBER 28, 2016

Applies to:

Oracle Server - Enterprise Edition - Version: 10.2.0.1 and later   [Release: 10.2 and later ]
Information in this document applies to any platform.

Symptoms

ORA-4031 when trying to allocate 4202584 bytes in Large Pool during RMAN backup.

Changes

Problem is hit under the following circumstances:

Large Pool is set to 200 Mb.
Free memory in Large Pool
Below query confirms there is a lot of free space within the Large Pool:

SQL>select * from v$sgastat where pool='large pool';
Granule size

From the ORA-4031 tracefile we can see GRANULE SIZE is 4194304 bytes:

GRANULE SIZE is 4194304

RMAN parameter BLKSIZE is set to 4194304 bytes:

ALLOCATE CHANNEL ch00 TYPE 'SBT_TAPE' maxpiecesize 70G parms='BLKSIZE=4194304';

Cause

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