My Oracle Support Banner

High Executions Of Statement "delete from smon_scn_time..." (Doc ID 375401.1)

Last updated on FEBRUARY 03, 2022

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 10.1 to 10.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.Symptoms

A delete from smon_scn_time is performing excessive gets and executions as viewed from AWR report:

Buffer Gets Executions Gets per Exec %Total CPU Time (s) Elapsed Time (s)
205,501,888 30,508 6,736.00 54.05 9,733.97 61,180.96  delete from smon_scn_time where...

The AWR report shows the following SQL with  an excessive amount of executions:

delete from smon_scn_time where thread=0 and time_mp = (select min(time_mp) from smon_scn_time where thread=0);


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.