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 Originally Posted by oracbase
On the Dev DB, the only wait events were "db file sequential read & db file scattered read" + the usual "SQL*Net message".
On Prod DB, there wasn't any wait besides the usual "SQL*Net message".
Check again prod trace, no read wait events means query didn't even attempted to read.
Please post tkprof of relevant section of both dev and prod traces.
Pablo (Paul) Berzukov
Author of Understanding Database Administration available at amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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