AWR Snapshots Missing Intermittently Accompanied by Spike in CPU from MMON Process
(Doc ID 1466333.1)
Last updated on AUGUST 04, 2018
Oracle Database - Enterprise Edition - Version 10.1.0.2 and later
Information in this document applies to any platform.
- When querying the view DBA_HIST_SNAPSHOT, you find that snapshots are missing on occasion. They should occur hourly (by default), but they are not consistently being collected on the hour.
- You may also notice a surge in CPU utilization occasionally at the top of the hour.
There have been no changes to the server parameter file or to the Oracle Database software home.
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