See also:
A few weeks ago we’ve published some parameter recommendations including several underscores but based on an internal discussion (still ongoing) we decided to remove this entry and split up the tasks. The optimizer team will take over parts of it and I’ll post an update as soon as something is published.
Preface
Please be advised – the following parameter list is mostly based on personal experience only. Some of them are officially recommended by Oracle Support. Always use proper testing mechanisms.
We strongly recommend SQL Performance Analyzer to …
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