Re: Query puts 7.3.4 on endless loop but 7.4beta5 is fine. [ with better indenting ]
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Тема | Re: Query puts 7.3.4 on endless loop but 7.4beta5 is fine. [ with better indenting ] |
Дата | |
Msg-id | 13042.61.16.154.82.1067523120.squirrel@mail.trade-india.com обсуждение исходный текст |
Ответ на | Re: Query puts 7.3.4 on endless loop but 7.4beta5 is fine. [ with better indenting ] (Christopher Browne <cbbrowne@acm.org>) |
Список | pgsql-performance |
> mallah@trade-india.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. > -- > wm(X,Y):-write(X),write('@'),write(Y). wm('cbbrowne','acm.org'). > http://www3.sympatico.ca/cbbrowne/lsf.html > Rules of the Evil Overlord #81. "If I am fighting with the hero atop a moving platform, have > disarmed him, and am about to finish him off and he glances behind me and drops flat, I too > will drop flat instead of quizzically turning around to find out what he saw." > <http://www.eviloverlord.com/> > > ---------------------------(end of broadcast)--------------------------- TIP 6: Have you > searched our list archives? > > http://archives.postgresql.org ----------------------------------------- Over 1,00,000 exporters are waiting for your order! Click below to get in touch with leading Indian exporters listed in the premier trade directory Exporters Yellow Pages. http://www.trade-india.com/dyn/gdh/eyp/
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