Re: Query planner problem
От | Doug McNaught |
---|---|
Тема | Re: Query planner problem |
Дата | |
Msg-id | m3k7sgs3qy.fsf@varsoon.denali.to обсуждение исходный текст |
Ответ на | Query planner problem ("Crash Dummy" <crash.dummy@ntlworld.com>) |
Список | pgsql-general |
"Crash Dummy" <crash.dummy@ntlworld.com> writes: > Hi, > > I've moved a database onto a much faster machine but for some reason the > query planner is opting to use seq scan methods rather than the indexes. > > This is a very large database without the indexes the performance is dire - > the new machine is a 2Ghz P4 with 1GB RAM, the old machine is a 900Mhz P3 > with 512Mb Ram. > > Any idea why this is happening adn what I can do to solve the problem ? I've > tried dropping & rebuilding the indexes, vacuum analyze etc but to no > effect. Post your schema and EXPLAIN output for the problem queries. -Doug -- Doug McNaught Wireboard Industries http://www.wireboard.com/ Custom software development, systems and network consulting. Java PostgreSQL Enhydra Python Zope Perl Apache Linux BSD...
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