AIX on Power System: Low-speed Write On An ACFS Volume
(Doc ID 1901785.1)
Last updated on JANUARY 24, 2020
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 11.2 to 12.1]
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
IBM AIX on POWER Systems (64-bit)
You are using Oracle RAC 11gR2 on AIX 7.1 and have a diskgroup ACFS, ACFS volume enabled and an ACFS mounted filesystem for rman external tables files (large files).
The ACFS volume works correctly but is having a poor write speed.
Also, Legato is being used as the backup tool.
Ensure that Virtual memory (VMM) is tuned per the IBM recommendations.
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