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Thanks Chuck,

The statements in question are being issues as only as part of an
interactive RPG program.

They are being prepared dynamically (yes I know this is open to SQL
injection), with literal comparison values. However, in the SQL plan
cache, the literals were replaced by parameter makers. But given that
many of the statement have a Total Times Run of greater than 0, and
there's not enough duplicates for every dynamic run to result in a new
entry in the plan cache, I'm hoping somebody might know the
circumstances in which a duplicate entry is added to the plan cache.

Charles

On Wed, Apr 28, 2010 at 11:08 AM, CRPence <CRPbottle@xxxxxxxxx> wrote:
Charles Wilt wrote:
Trying to do some performance tuning, noticed that the SQL plan
cache often has the same statement shown multiple times...which
of course throws off the "Total Times Run".

  I guess that would be the total times the [same] statement has
been run _with the associated plan_ then.? :-)

Anybody know why this happens?  or some way to work around it?
(he says as he looks at Elvis ;-)


  Get all invocations of that statement to implement with the same
plan.? ;-)

  Seriously though... I seem to recall seeing that, for example,
the /same/ statement run interactive [*firstio implicit
optimization] versus batch [with *allio implicit optimization] would
appear separately; the statements /explained/ with that difference.
 For that scenario, adding the OPTIMIZE FOR ALL ROWS clause on the
SELECT request would make the one statement appear only once, after
having cleared the cache.

Regards, Chuck
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