RE: V$SESSSTAT stat 3 vs V$OPEN_CURSOR

There were discussions about this before. You can search the archive for it. v$open_cursor and the statistic "opened cursor current" doesn't always agree. v$open_cursor show cursors parsed and not closed, while the "opened cursor current" shows cursors opened and not closed. v$open_cursor doesn't track for unparsed dynamic cursors so it some times doesn't show all cursors that count toward the max open cursor parameter.

Richard Ji

-----Original Message-----
Sent: Thursday, August 07, 2003 4:14 PM
To: Multiple recipients of list ORACLE-L

No takers on this from the perf tuning gurus? Please don't make me open a TAR. Think of the children...

Rich

Rich Jesse                           System/Database Administrator
rjesse_at_qtiworld.com                  Quad/Tech Inc, Sussex, WI USA

> -----Original Message-----
> From: Jesse, Rich
> Sent: Thursday, July 24, 2003 3:39 PM
> To: Multiple recipients of list ORACLE-L
> Subject: V$SESSSTAT stat 3 vs V$OPEN_CURSOR
>
>
> Hey all,
>
> We recently had a problem with a 3rd-party app getting
> "ORA-1000 max open
> cursors exceeded" on their 8.1.7.4 DB. Since OPEN_CURSORS is
> set to 500 in
> the init.ora -- should be more than generous for a tiny app
> on a tiny DB --
> we started looking into how many cursors the app actually has
> open at any
> given time.
>
> While investigating this, I see that the number of rows in
> V$OPEN_CURSORS
> isn't consistent with the value of stat 3 ("opened cursors
> current") of
> V$SESSSTAT. Of the two processes I looked at, each had a
> V$SESSSTAT value
> of "3" for stat 3, while the first had a single entry in
> V$OPEN_CURSOR and
> the second had four.
>
> Should these values match? I looked on Metalink but was
> unable to find any
> reference to the relationship between these, other than a
> forum article
> where the OraSupport person was extraordinarily unhelpful.
>
> TIA,
> Rich
>
> Rich Jesse System/Database Administrator
> rjesse_at_qtiworld.com Quad/Tech Inc, Sussex, WI USA

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