I think that is because if you use parallel option oracle read in direct I/O
mode.
----- Original Message -----
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
Sent: Tuesday, September 25, 2001 2:01 PM
> list,
> finally i was able to solve the free buffer waits in my instance. These
> waits
> were saturating the db and the response time of a select count(*) on a 5
> million
> rows was 7 hours !!!
>
> i altered the table to include PARALLE 3, and specified the min_parallel
> server = 3
> bounced the db and voila !! all the waits vanished !!
>
> another problem was ... the scattered read of a FTS was NOT reaching
> multiblock_count
> after altering the tables... the FTS is also reading the required no. of
> blocks !!
>
> when i do a select count(*) with a NOPRALLEL hint it still makes free
buffer
> waits and other
> problems...
>
> CONCLUSION
> i am not able to figure out why ???
>
> TIA
> Rahul
>
>
>
>
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> Please see the official ORACLE-L FAQ: http://www.orafaq.com
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> Author: Rahul
> INET: [EMAIL PROTECTED]
>
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--
Author: claudio cutelli
INET: [EMAIL PROTECTED]
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