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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Number of open cursors
Linda,
Check Doc IDs 76684.1, 18591.1 and 1012266.6 on Metalink for notes on what
these numbers mean, why they differ and some tuning info.
HTH
Srini Chavali
Oracle DBA
Cummins Inc
Linda Hagedorn <Linda_at_pets.com>@fatcity.com on 08/30/2000 12:47:21 PM
Please respond to ORACLE-L_at_fatcity.com
Sent by: root_at_fatcity.com
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
cc:
Subject: RE: Number of open cursors
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
> 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
> > San Diego, California -- Public Internet access / Mailing Lists
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>
> --
> Author: Ari D Kaplan
> INET: akaplan_at_interaccess.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> San Diego, California -- Public Internet access / Mailing Lists
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> To REMOVE yourself from this mailing list, send an E-Mail message
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-- Author: K Gopalakrishnan INET: kaygopal_at_yahoo.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Author: Linda Hagedorn INET: Linda_at_pets.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-LReceived on Wed Aug 30 2000 - 12:39:16 CDT
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