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RE: ** keep/pin objects in sga

From: Bobak, Mark <>
Date: Mon, 23 Oct 2006 15:59:17 -0400
Message-ID: <>

None of the X$ tables are documented by Oracle.  


X$KGHLU - Statistics about shared pool LRU lists
X$KSMSP - Listing of chunks in the shared pool
X$KSMSS - Map of SGA memory chunks.  Basis for V$SGASTAT view.

Hope that helps,  



Mark J. Bobak

Senior Oracle Architect

ProQuest Information & Learning

There is nothing so useless as doing efficiently that which shouldn't be
done at all.  -Peter F. Drucker, 1909-2005


From: [] On Behalf Of A Joshi Sent: Monday, October 23, 2006 3:37 PM To: Cc:; Subject: Re: ** keep/pin objects in sga Eagle fan, Thanks. I tried to look up the REFERENCE manual for 9i but could not find explanation for x$ views : x$kghlu, x$ksmss, x$ksmsp I did find v$ views listed. Can you tell where I can find the explanation. Thanks About cursor_space_for_time : My current shared pool is 600MB. If I set cursor_space_for_time to true then I assume I will need to increase the shared pool. Any way I can compute or guess how much I need to increase. Thanks Go eagles. eagle fan <> wrote: hi: If you have literal sql issue, I suggest you use bind variables rather than cusor_sharing. The parameter cursor_space_for_time is used to pin shared sql in shared_pool. You can find more info about this parameter.. For advance warning, you can check the x$ tables: x$kghlu, x$ksmss, x$ksmsp On 10/22/06, A Joshi < > wrote: Fuad, Thanks. So no short cut there. OK. So I guess we still need to do keeping of objects and sql. And put in bind variables. I assume there is some improvement in 9i in handling all this. Is there anything else that can be done to improve the sga usage and avoid its fragmentation and is there way to get advance warning when it is fragmented and could be heading for problems. Thanks Fuad Arshad <> wrote: cursor sharing still has a lot of bugs. it depends on the environment but tom kyte also asked for the use of this only at session level rather than system level ----- Original Message ---- From: A Joshi <> To: Sent: Friday, October 20, 2006 3:20:15 PM Subject: ** keep/pin objects in sga Hi, For efficient use of shared pool and SGA : On 9i : I assume it is beneficial to keep objects and sql in sga. Or is it not needed on 9i? I think parameter CURSOR SHARING can be set to FORCE as alternative to using bind variables and that will help SGA use but there were issues with it. I assume in 9i it is better. Any body with experience otherwise or any other catch? Thanks for your help.
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Received on Mon Oct 23 2006 - 14:59:17 CDT

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