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Message Posted: Tue, 26 Jun 2012 @ 09:43:19 GMT


     
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Subj:   Re: Explain Plan differences between Static and Dynamic SQL
 
From:   Mark Young

Asifuddin Md wrote:

  Also note the DBSControl/cost profile(if being used) settings do come into play. If you are to compare an earlier version to this - please see, if anything can be tuned in here as well.  


Hi,

I noticed your comment about cost profiles and was wondering if you have more detail on the impact of differences. We have just upgraded our Production system from a 5500H running 13.01 to a 6650H running 13.10 and I did notice that they have a different value in the cost profile setting but was not sure if it needed to match or not. We seem to be experiencing a lot more skewing issues on the new system and while our benchmark tests ran better on the new system, we are seeing some queries run significantly worse.


Mark



     
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