False Swap Warning Messages Printed To Alert.log On AIX (Doc ID 1508575.1)

Last updated on NOVEMBER 28, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.3 to 11.2.0.3 [Release 11.2]
IBM AIX on POWER Systems (64-bit)

Symptoms

There is new warning message in alert.log in 11.2.0.3 similar to

WARNING: Heavy swapping observed on system in last 5 mins.
pct of memory swapped in [2.08%] pct of memory swapped out [0.12%].
Please make sure there is no memory pressure and the SGA and PGA
are configured correctly. Look at DBRM trace file for more details.

On AIX platform this message can be seen even when there is no virtual memory swapping at all.

You may compare the vmstat from AIX level with DBRM trace file entries to see the differences.

Cause

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