Re: max parallel query

There is no simple magic formula how many parallel slaves you should have. It all depends on your CPU and IO utilization. Yes, utilization, because if your CPUs or IO are running at their limits already, you won't benefit from parallel execution at all. In fact PX may make the situation even worse, because it's designed to give you the results the fastest way, not the most efficient way.

Tanel.

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Thursday, September 18, 2003 6:15 PM

> We run multiple instances on the same server. My understanding is
max_parallel_servers should be set to 4 x CPU. We have 4 CPUs which means 16.
>
> however, does this take into account multiple instances on the same
server?
>
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Tanel Poder
  INET: tanel.poder.003_at_mail.ee

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