Slower ACFS I/O Performance After Applying PSU 184.108.40.206.8 and General Slow ACFS Performance on AIX for 11.2
(Doc ID 2233606.1)
Last updated on FEBRUARY 12, 2019
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11 to 18.104.22.168 [Release 11.2 to 12.1]
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
IBM AIX on POWER Systems (64-bit)
IBM AIX on POWER Systems (32-bit)
Performance of tape backups from ACFS was much slower after applying 22.214.171.124.8 GI PSU. RMAN backup's seem to be running okay.
Comparing ACFS to a regular filesystem, it took twice the time on ACFS to dd a file to /dev/null.
You may also see heavy paging on the system.
oks log will show lot of page steals and read faults.
Collect in-memory logs: "acfsutil log -f okslog.txt", compress okslog.txt
Applied 126.96.36.199.8 GI PSU.
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