RE: sga

The form for the application does build some really crappy dynamic sql, 2 pages 
worth.  The vendor said "oh you have to add some indexes"  but that doesn't 
look to be the case.  I seem to be leaning toward the cursor issue myself.  
I'll see what it is set to.



ciao,
Brian

Brian J. Zelli, Ed.M.
Sr. Database Administrator
Enterprise Application/Systems Integration
Information Technology - Roswell Park Cancer Institute
phone: (716) 845-4460 email: 
brian.zelli@xxxxxxxxxxxxxxx<mailto:brian.zelli@xxxxxxxxxxxxxxx>



________________________________
From: Andrew Kerber [mailto:andrew.kerber@xxxxxxxxx]
Sent: Friday, June 12, 2009 9:30 AM
To: Mathias Magnusson
Cc: Zelli, Brian; oracle-l@xxxxxxxxxxxxx
Subject: Re: sga

If the issue is lack of bind variables (too much dynamic sql), you can think 
about setting cursor_sharing=force, that solution has other problems however.

On Fri, Jun 12, 2009 at 8:26 AM, Mathias Magnusson 
<mathias.magnusson@xxxxxxxxx<mailto:mathias.magnusson@xxxxxxxxx>> wrote:
Do you know that it causes a problem? What is your key wait event that this 
will address and how much do you spend waiting for it? Where do you find this 
ratio recommendation?

Mathias


On Fri, Jun 12, 2009 at 3:04 PM, Andrew Kerber 
<andrew.kerber@xxxxxxxxx<mailto:andrew.kerber@xxxxxxxxx>> wrote:
Well, adding memory is an option.  You should also look at your code.  If you 
are not using bind variables, that can also cause the problem, and it is almost 
impossible to fix that problem just by adding memory.


On Fri, Jun 12, 2009 at 8:01 AM, Zelli, Brian 
<Brian.Zelli@xxxxxxxxxxxxxxx<mailto:Brian.Zelli@xxxxxxxxxxxxxxx>> wrote:
Ok, so I have my sga tuned by the advisor in 10g but I have a library cache hit 
ratio constantly below the recommended threshold of 90%.  How the heck do I 
tune it?  Do I just increase the sga_target?


ciao,

Brian





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Andrew W. Kerber

'If at first you dont succeed, dont take up skydiving.'


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