Is it possible that under 7.3.2 the optimizer was rule-based (I don't know
when CBO was introduced) and that under 8.1.5 it is set to CHOOSE or
FIRST_ROWS or ALL_ROWS?
Also, is there anyway you could move to 8.1.6 and take advantage of the
CURSOR_SHARING parameter?
Jon Walthour
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]>
Sent: Thursday, July 26, 2001 5:37 AM
> list,
> this application heavyly make use of literals , NO BIND VARIABLES
> and was running without any lib cache latch or shared pool latch problems
on
> 7.3.2
>
> We ported the DB to 8.1.5 and v$session_wait is full of "latch free" event
> !!
> all the latch waits are on lib cache and shapred pool (as expected from
any
> app NOT using bind vars)
> and the app is running terribly slow !!
>
> my question is... how 7.3.2 was able to handle this ?? how i explain this
to
> my management ?
> i was able to convince then on porting to 8i to get better perfornace !!
>
> note: i cannot change the app. all changes must be from the back end.
>
> TIA
>
> Rahul
>
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> --
> Author: Rahul
> INET: [EMAIL PROTECTED]
>
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Author: Jon Walthour
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