Re: library cache get hit ratio

  • From: Tim Gorman <tim@xxxxxxxxx>
  • To: Brian.Zelli@xxxxxxxxxxxxxxx
  • Date: Thu, 02 Dec 2010 15:22:11 -0700

Are you seeing any time being consumed by wait-events related to "library cache XXXX"?  If so, follow that trail...

If not, then it is not worth worrying about.  Beware forcing this list into another paroxysmal rant against "ratio-based tuning" -- you'll be sorry.  Just watch where the time goes, ignore those ratios except as possible pointers to waits...

On 12/2/2010 12:45 PM, Zelli, Brian wrote:
I am seeing my lib cache get hit ratio at 60-70%.  What I read says it should be above 90%. It says if it is low to increase shared pool size.  I doubled it and still see no difference. 
Anything else to change? 
It also says to improve the efficiency of the app code but the developers are using a tool that creates the app and are clueless as to what's under the hood.





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