| open cursors [message #271296] |
Mon, 01 October 2007 03:28  |
dirish
Messages: 232
Registered: November 2006
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Senior Member |
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Hi Friends,
when i execute the below statement,
SELECT sid, user_name, COUNT(*) "Cursors per session"
FROM v$open_cursor
GROUP BY sid, user_name
I have about 379 as result.
In my init.ora, the parameter "open_cursors=400".
What factors should be taken into consideration to increase this value?
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| Re: open cursors [message #271302 is a reply to message #271297] |
Mon, 01 October 2007 03:44  |
dirish
Messages: 232
Registered: November 2006
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Senior Member |
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Hi Michel,
thanks,
this means that if we take the below output (in red), the user mnswcp is connected to the database and is using 34 cursors over the total of 400 that I have.
SID USER_NAME Cursors per session
15 MNSWCP 34
From which I read, if there is a cursor problem, I should get "ORA-01000 Open Cursor error".
Fortunately, till now I haven,t get this error. But to be on the safe side, I want to increase the open cursors value.
Can you please tell me which factors should be taken into consideration to increase this value.
Thx
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| Re: open cursors [message #271517 is a reply to message #271302] |
Mon, 01 October 2007 16:48 |
OracleDisected
Messages: 25
Registered: September 2007
Location: Mexico
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Junior Member |
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Apparently you don't need to increase that parameter.
Given 400 as open cursor limit per session , and 34 as the current open cursors for that user, the session has margin for 366 additional cursors to open.
In other words , every session has 400 cursors to open.
Best Regards
Ignacio
[Edit MC: url to poster blog removed. We don't care about your blog in this post. If you have an answer on your site, post a link to this answer. If you don't, post your blog url in Marketplace]
[Updated on: Thu, 11 October 2007 12:40] by Moderator Report message to a moderator |
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| Re: open cursors [message #271544 is a reply to message #271537] |
Tue, 02 October 2007 00:29 |
dirish
Messages: 232
Registered: November 2006
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Senior Member |
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Hi Friends,
I made a statistics yesterday and I noticed that over the total (open_cursors) of 400 that I have in the parameter file, an average of 350-375 are being used.
Fortunately, till now I haven't come across the error 'ORA-01000 Open Cursor error'.
Can I increase it, to be on the safe side?
Thx
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| Re: open cursors [message #271589 is a reply to message #271569] |
Tue, 02 October 2007 02:13 |
dirish
Messages: 232
Registered: November 2006
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Senior Member |
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Hi All,
it's said that 'The maximum value of this parameter is operating system dependent'.
I have Solaris 8 and oracle 9db. 600M SGA, 3GB Physical memory. Can you please tell me the maximum value I can set for this parameter.
Thx
Dirish
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| Re: open cursors [message #271606 is a reply to message #271590] |
Tue, 02 October 2007 03:10 |
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Michel Cadot
Messages: 68658
Registered: March 2007
Location: Nanterre, France, http://...
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Senior Member
Account Moderator |
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| Quote: | Can you please tell me the maximum value I can set for this parameter.
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No, I can't. Ask Oracle or try all values you can.
| Quote: | you asked me to read "this topic". But you haven't sent me any topic/mail/URL.
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I answered:
That is "this very one you are currently writing in".
Regards
Michel
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