From: | <mallah(at)trade-india(dot)com> |
---|---|
To: | <cbbrowne(at)acm(dot)org> |
Cc: | <pgsql-performance(at)postgresql(dot)org> |
Subject: | Re: Query puts 7.3.4 on endless loop but 7.4beta5 is fine. [ with better indenting ] |
Date: | 2003-10-30 14:12:00 |
Message-ID: | 13042.61.16.154.82.1067523120.squirrel@mail.trade-india.com |
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Thread: | |
Lists: | pgsql-performance |
> mallah(at)trade-india(dot)com (Rajesh Kumar Mallah) wrote:
>> Can you please have a Look at the below and suggest why it
>> apparently puts 7.3.4 on an infinite loop . the CPU utilisation of the backend running it
>> approches 99%.
>
> What would be useful, for this case, would be to provide the query plan, perhaps via
>
> EXPLAIN [Big Long Query].
>
> The difference between that EXPLAIN and what you get on 7.4 might be quite interesting.
>
> I would think it quite unlikely that it is truly an "infinite" loop; it is rather more likely
> that the plan winds up being pretty bad and doing something [a bunch of nested loops, maybe?]
> that run longer than your patience will permit.
:-) ok i will leave it running and try to get it.
Regds
Mallah.
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