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Legacy 11g R2, pros and cons of turning off optimizer stats collection / dbms_stats gathering

edited Oct 14, 2019 5:00AM in Oracle Database Appliance (ODA) (MOSC) 7 commentsAnswered

Hi MOSC,

We gather stats for various reasons, mainly to collect data about database objects to have statistics for use

by the query optimizer to choose the best SQL execution plan for each SQL statement, among other tasks.

Our sql largely remains un-changed for all tenants of our application.

In an effort to reduce nightly load on the ODA X5-2 server, I have been asked what are the pros and cons of turning off week-night stats collection in our production system.

( We have explained that generally, we dba's don't recommend turning off automatic stats gathering. )

Any input is appreciated, thanks!

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