Jonathan,
At least the last case you mention is accounted for by the 'session
cache cursor hits' statistic. And, though it's not entirely clear to
me, based on the description in the Reference manual, it seems to me
that the 'cursor authentications' statistic may reflect the second case
in your list?
-Mark
Mark J. Bobak
Oracle DBA
ProQuest Company
Ann Arbor, MI
"Imagination was given to man to compensate him for what he is not, and
a sense of humor was provided to console him for what he is." --Unknown
-----Original Message-----
Sent: Thursday, January 08, 2004 4:54 AM
To: Multiple recipients of list ORACLE-L
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
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----- 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
>
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