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session cached cursors [message #209297] Thu, 14 December 2006 02:55 Go to next message
seema.taunk
Messages: 96
Registered: October 2006
Member
Hi friends,

I have some doubts regarding session cached cursors.
I have read on one site that:
Qn: is the actual maximum number of open cursors = open_cursors + session_cached_cursors? Or is the maximum number of open cursors simply = open_cursors
Ans given : The actual max is open_cursors. It is the hard limit.

On another site:
You can set SESSION_CACHED_CURSORS to higher than OPEN_CURSORS, lower than OPEN_CURSORS, or anywhere in between.

Q1: Which one is true?

Q2: If application don't use bind variables then even if u set sesion_cached_cursors it won't give performance improvement.
Is it true?

Q3: If we set session_cached_cursors say 50,then approx. how much memory will it consume( in bytes)? How can we calculate it approx.?


Please clarify.
Thanx.




Re: session cached cursors [message #209305 is a reply to message #209297] Thu, 14 December 2006 03:31 Go to previous messageGo to next message
Mohammad Taj
Messages: 2412
Registered: September 2006
Location: Dubai, UAE
Senior Member

hi,

are you go through below links


http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:865497961356


http://asktom.oracle.com/pls/ask/f?p=4950:8:7260879842203772240::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:865497961356


You can set SESSION_CACHED_CURSORS to higher than OPEN_CURSORS, lower than OPEN_CURSORS, or anywhere in between.


If we set session_cached_cursors say 50,then approx. how much memory will it consume( in bytes)? How can we calculate it approx.?

http://asktom.oracle.com/pls/ask/f?p=4950:8:7260879842203772240::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:17989406187750



regards
Taj
Re: session cached cursors [message #209307 is a reply to message #209305] Thu, 14 December 2006 03:43 Go to previous message
seema.taunk
Messages: 96
Registered: October 2006
Member
Hi,

Yes, I have gone through these sites .
I think for oracle 9i ,
The actual max is open_cursors. It is the hard limit.
& for oracle 10g,
You can set SESSION_CACHED_CURSORS to higher than OPEN_CURSORS, lower than OPEN_CURSORS, or anywhere in between.


Q2: If application don't use bind variables then even if u set sesion_cached_cursors it won't give performance improvement.
Is it true?
Please clarify.

[Updated on: Thu, 14 December 2006 04:34]

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