Simple queries take forever to run - Mailing list pgsql-performance

From Michael Guerin
Subject Simple queries take forever to run
Date
Msg-id 3F4D2535.8050103@rentec.com
Whole thread Raw
Responses Re: Simple queries take forever to run  (Stephan Szabo <sszabo@megazone.bigpanda.com>)
Re: Simple queries take forever to run  (Neil Conway <neilc@samurai.com>)
List pgsql-performance
I'm running into some performance problems trying to execute simple
queries.

postgresql version 7.3.3
.conf params changed from defaults.
shared_buffers = 64000
sort_mem = 64000
fsync = false
effective_cache_size = 400000

ex. query: select * from x where id in (select id from y);

There's an index on each table for id.  SQL Server takes <1s to return,
postgresql doesn't return at all, neither does explain analyze.
x has 1200673 rows
y has 1282 rows

It seems like its ignoring the index and not using enough memory.. any
ideas?


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