There's a failure in the statistics at this point.
As far as I can tell, there are at least four different
reasons why the stats can report a
parse count (total)
without recording a
parse count (hard)
and it would be nice if we could see them as four
different statistics.
Code that explicit holds a cursor open need
not issue a parse call at all.
Code that issues a parse call may:
Invoke the whole parse/optimize cycle
Invoke a permissions cycle on an existing statement
Invoke a search and execute cycle on an existing statement with valid
permission
Invoke a 'this is where it is and I know I've got permission, so just do
it' cycle
The last option can appear when you set up
session_cached_cursors != 0.
The front-end code is still issuing an explicit parse call,
which is why you see the parse count go up, but the
work done is kept to near minimum.
NOTE: This description is probably not complete
and I'd welcome any corrections and refinements
that anyone can supply.
Regards
Jonathan Lewis
http://www.jlcomp.demon.co.uk
The educated person is not the person
who can answer the questions, but the
person who can question the answers -- T. Schick Jr
Next public appearance2:
March 2004 Hotsos Symposium - Keynote
March 2004 Charlotte NC - OUG Tutorial
April 2004 Iceland
One-day tutorials:
http://www.jlcomp.demon.co.uk/tutorial.html
Three-day seminar:
see http://www.jlcomp.demon.co.uk/seminar.html
____UK___February
The Co-operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/faq/ind_faq.html
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Thursday, January 08, 2004 1:34 AM
> if your caching the cursors, why does soft parsing still happen?
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
> Sent: Wednesday, January 07, 2004 7:24 PM
>
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: Jonathan Lewis
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