RE: flush shared_pool and query performance

From: Allen, Brandon <>
Date: Thu, 3 Apr 2008 15:14:59 -0700
Message-ID: <04DDF147ED3A0D42B48A48A18D574C450B1AFA38@NT15.oneneck.corp>

Yes, I would say .3 seconds is reasonable for a hard parse - that's why we have the shared pool and bind variables to minimize hard parsing. Parse time depends on many things such as the complexity of the query, number of tables joined, optimizer_max_permutations, contention for latches, parsing and IO required for recursive queries on the DD, etc. You might want to try restricting optimizer_max_permutations, especially if you're in pre-9i where it used to default to 80,000 I believe. Maybe check if you're doing dynamic sampling also.


-----Original Message-----
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 Is that reasonable for parsing to take 0.3s?

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Received on Thu Apr 03 2008 - 17:14:59 CDT

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