Re: Verify Outdated Optimizer Stats
Date: Tue, 17 Feb 2009 10:23:51 -0800 (PST)
On Feb 16, 11:55 pm, Ram <krishna..._at_gmail.com> wrote:
> Hi All,
> I hope every one would have come across that users complaining about
> the response of database.Usually the first thought comes to the DBA
> is to Gather Stats and verify the performance.Performance will be far
> better after collecting stats and this is expected behavior.
> Before users start complaining about the performance of database is
> very slow , Can't we verify the statistics for out database is that
> outdated. Can any one throw some light on this .
Some people have scheduled jobs/procedures that do their own stats gathering at different intervals.
Some people let Oracle ( especially in 10g and beyond ) decide when to get new stats.
You can export out the old stats before implementing new sets.
It all depends ... on the standards in place at the shop in question.
But any DBA that just waits until complaints start coming in is following an approach that I would not recommend. Received on Tue Feb 17 2009 - 12:23:51 CST