RE: Number of open cursors

But it can happen, I ran into a situation where a vendor provided load/migration utility had some "minor" problems. One of these problems was that I had to set open_cursors to 25000 in order for the utility to be able to process one of their 20000 line files (as a workaround because the vendor didn't feel the need to fix the problem). Luckily it was only this utility that had this problem and not the actual application itself (it had its own issues to deal with), so I could cut back on the resource usage after the initial data loads were done.

Jeffery Stevenson
Chief Database Geek
Medical Present Value, Inc.
Austin, TX

-----Original Message-----
From: root_at_fatcity.com [mailto:root_at_fatcity.com]On Behalf Of Shevtsov Eduard
Sent: Wednesday, August 30, 2000 2:33 PM To: Multiple recipients of list ORACLE-L Subject: Re: Number of open cursors

Hello Linda

Please, consider that open_cursor is the per-session setting IMHO only in the rare situations you have to increase open_cursor up to 300 or even more 400

Kind regards,
Edward

> I need to find the count of cursors currently open which count against the
> open_cursors limit in init.ora, and the expected behavior when the limit
is
> reached and/or exceeded. References to documentation or dissertations are
> appreciated.
>
> According to the queries below, I have between 510 and 1871 cursors open,
> and my init.ora limit is 200.
>
> I have failures in the front end web product, BroadVision, and am unlikely
> to have the debug capabilities turned on from that side. I'm stuck trying
> to determine SQL failures from the Oracle side. SQL trace level 4 will be
> turned on in the next recycle, and I do not have control of the executing
> SQL for testing purposes.
>
> References are welcome. If I've made something unclear, please let me try
> again.
>
> Regards, Linda
>
> select count(*) from v$open_cursor;
> COUNT(*)
> ---------
> 510
>
> select value, name from v$sysstat where statistic# in (2,3) ;
> VALUE NAME
> --------- ----------------------------------------------------------------
> 4313697 opened cursors cumulative
> 1871 opened cursors current
>
> select substr(name,1,25),substr(value,1,15),isses_modifiable,
> issys_modifiable
> from v$parameter where name like '%cursor%' ;
> SUBSTR(NAME,1,25) SUBSTR(VALUE,1, ISSES ISSYS_MOD
> ------------------------- --------------- ----- ---------
> row_cache_cursors 100 FALSE FALSE
> close_cached_open_cursors FALSE TRUE FALSE
> open_cursors 200 FALSE FALSE
> cursor_space_for_time FALSE FALSE FALSE
> session_cached_cursors 0 TRUE FALSE
>
>
> Reference:
> GV$OPEN_CURSOR select inst_id,kgllkuse, kgllksnm,
> user_name, kglhdpar, kglnahsh, kglnaobj
> from x$kgllk
> where kglhdnsp = 0
> and kglhdpar != kgllkhdl;
>
> V$OPEN_CURSOR select SADDR , SID , USER_NAME ,
> ADDRESS , HASH_VALUE , SQL_TEXT
> from GV$OPEN_CURSOR
> where inst_id = USERENV('Instance');
>
>
>
>
> -----Original Message-----
> Sent: Wednesday, August 30, 2000 1:01 AM
> To: Multiple recipients of list ORACLE-L
>
>
> Hi !
>
> THe better picture can be obtained from
> V$SYSSTAT because V$OPEN_CURSORS
> will not inlde the dynamic cursor stats
>
> SELECT name,value from V$sysstat
> where name like '%cursor%;
>
> K Gopalakrishnan
> Bangalore, INDIA
>
>
>
>
>
> ----- Original Message -----
> To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> Sent: Wednesday, August 30, 2000 4:26 AM
>
>
> > You can issue
> >
> > SELECT COUNT(*) FROM V$OPEN_CURSOR;
> >
> > To be more specific, this can be selected for ALL cursors, or by SID.
> >
> > SELECT * FROM V$OPEN_CURSOR;
> >
> > Best regards,
> >
> > -Ari Kaplan
> > Independent Oracle DBA Consultant
> >
> > <-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><->
> > <-> For 380+ Oracle tips, visit: <->
> > <-> <->
> > <-> www.arikaplan.com <->
> > <-> <->
> > <-> email: akaplan_at_interaccess.com <->
> > <-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><-><->
> >
> >
> > On Tue, 29 Aug 2000, Linda Hagedorn wrote:
> >
> > > Where would I find the number of currently open cursors, instance
wide?
> > >
> > > Thanks,
> > >
> > > Linda Hagedorn
> > >
> > > --
> > > Author: Linda Hagedorn
> > > INET: Linda_at_pets.com
> > >
> > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
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> >
> > --
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> > INET: akaplan_at_interaccess.com
> >
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> --
> Author: K Gopalakrishnan
> INET: kaygopal_at_yahoo.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
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--
Author: Shevtsov Eduard
  INET: eshevtsov_at_flagship.ru

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