Re: free bufer waits - solved

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 <ORACLE-L_at_fatcity.com> 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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> Author: Rahul
> INET: rahul_at_ratelindo.co.id
>
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-- 
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-- 
Author: claudio cutelli
  INET: c_cutelli_at_hotmail.com

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