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SQL Performance (MOSC)

sampling percentageWhat does certain percentage mean ?

Oct 28, 2016 4:47AM edited Nov 14, 2016 9:34AM in SQL Performance (MOSC) 7 commentsAnswered

Hi !

dbms_stats has the following information for sampling percent

Usage Notes

When you use a specific value for the sampling percentage, DBMS_STATS honors it except for when:

The result is less than 2500 rows (too small a sample) and
The specified percentage is more than the certain percentage.

what does certain percentage mean ?

Appreciate your comments

Thanks

Magnus

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