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Re: SQL Tunning using Indexes

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Sat, 25 Nov 2000 23:02:51 -0000
Message-ID: <975189738.28928.0.nnrp-02.9e984b29@news.demon.co.uk>

Don't forget that you also have to set
parallel_max_servers, and parallel_min_percent. The commonest cause of

    'max # of parallel processes'
is then due to parallel servers not being released at the right time, so that even though processes, and parallel_max_processes seem to be big enough, Oracle still fails.

--
Jonathan Lewis
Yet another Oracle-related web site:  http://www.jlcomp.demon.co.uk

Practical Oracle 8i:  Building Efficient Databases

Publishers:  Addison-Wesley
Book bound date: 8th Dec 2000
See a first review at:
http://www.ixora.com.au/resources/index.htm#practical_8i
More reviews at: http://www.jlcomp.demon.co.uk/book_rev.html



Lynux wrote in message <8vp267$5au1_at_imsp212.netvigator.com>...

>Nuno, we have already tested it after our previous post on a month before.
>It works for 8.0.6 already after a parallel_index hints was added.
>However, don't think it is perfect as sometimes I got an error of max # of
>parallel processes attained when I set the degree as 5. Funly that I can
>saw that the number of concurrent processes was about 150 at that time.
>A day after, we run the SQL again with the same degree and it run without
>any error (concurrent processes is ~210). And, we have set our # of
>processes to be 400 in the init<SID>.ora
>
Received on Sat Nov 25 2000 - 17:02:51 CST

Original text of this message

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