High IO Load in DIA0 Trace Though IO Load Not High
(Doc ID 1915870.1)
Last updated on AUGUST 21, 2020
Applies to:
Oracle Database - Enterprise Edition - Version 11.2.0.4 to 12.1.0.2 [Release 11.2 to 12.1]Oracle Database Cloud Schema 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
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
Exadata Full rack cluster connected to ZFSSA appliance.
DIA0 trace shows the below messages after database upgrade :-
*** 2014-03-18 13:42:31.343
HM: IO load was high but is now below abnormal levels. (0x0) (0)
*** 2014-03-18 13:44:02.385
HM: IO load is abnormally high. (0x600) (17)
*** 2014-03-18 13:51:07.628
HM: IO load was high but is now below abnormal levels. (0x0) (12)
*** 2014-03-18 13:51:37.897
HM: IO load is abnormally high. (0x600) (21)
*** 2014-03-18 13:57:11.833
HM: IO load was high but is now below abnormal levels. (0x0) (4)
*** 2014-03-18 14:05:32.655
HM: IO load is abnormally high. (0x600) (26)
HM: IO load was high but is now below abnormal levels. (0x0) (0)
*** 2014-03-18 13:44:02.385
HM: IO load is abnormally high. (0x600) (17)
*** 2014-03-18 13:51:07.628
HM: IO load was high but is now below abnormal levels. (0x0) (12)
*** 2014-03-18 13:51:37.897
HM: IO load is abnormally high. (0x600) (21)
*** 2014-03-18 13:57:11.833
HM: IO load was high but is now below abnormal levels. (0x0) (4)
*** 2014-03-18 14:05:32.655
HM: IO load is abnormally high. (0x600) (26)
Support Bundle collected referring Note 1019887.1 - Sun Storage 7000 Unified Storage System: How to Collect a Support Bundle using the BUI or CLI.
Support Bundle did not show high IO / disk saturation.
Changes
Database upgraded from 11.2.0.2 to 11.2.0.4.
Cause
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