Re: Extremely Slow Query

The problem is generic, the specific query isn't the point. RAC is a massive improvement on OPS because block transfer is by wire not disc - but it still takes a serious amount of time to fling blocks from node to node, especially if the blocks have been subject to very recent update at the remote nodes.

I like both your explanations for the size, and the unusual number of obj$ blocks that needed CR serving.

Regards

Jonathan Lewis
http://www.jlcomp.demon.co.uk

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____England______January 21/23

The Co-operative Oracle Users' FAQ
http://www.jlcomp.demon.co.uk/faq/ind_faq.html

-----Original Message-----
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Date: 03 January 2003 02:34

>Do you think it's really the big problem? I'm just
>thinking about Oracle APPS instance or something
>alike. Somebody could start object recompilation
>(maint. pack/adadmin), synonyms creation or whatever
>like that on a node. Meanwhile full obj$ scan
>is/will go on on other node. How often people do
>FTS of obj$ on OLTP systems?
>
>There is 80% probability that many of those are/were
>synonyms or that system is fully synonyms based. I
>have no other idea -- 463566 looks really cool.
>

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Author: Jonathan Lewis
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