Database Tuning (MOSC)

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Gather Schema Statistics

edited Feb 25, 2011 9:31AM in Database Tuning (MOSC) 3 commentsAnswered
 Hi,

I have created one custom index for one seeded table to resolve the performance issue.After creating it, I executed the concurrent program "Gather Schema Statistics" with estimate percent "10" . when i run my custom procedure, it considered my custom index and the procedure completed with in 10 mins.

But yesterday  "Gather Schema Statistics" was executed with extimate percentage "99". Today my custom procedure is taking long time. and also the explain plan of my query is not consider the previously created custom index.

What was the actaul issue  here.........

What the parameter "Estimate Percent " will do ?????????????

Thanks

Ramya.R

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