Re: Is that a bug?

Does dropping and recreating the index help?
Does explain work on the query?

Stephan Szabo
sszabo@bigpanda.com

On Thu, 21 Dec 2000, R D wrote:

> No, plain select also does not work.
>
> --- Stephan Szabo <sszabo@megazone23.bigpanda.com>
> wrote:
> >
> > Hmm, does a plain select * from gsc_act work?
> > Also, what does explain show for the queries?
> >
> > Stephan Szabo
> > sszabo@bigpanda.com
> >
> > On Thu, 21 Dec 2000, R D wrote:
> >
> > > Hi,
> > > I have some problems with postgresql 7.0.3 running
> > on
> > > Slackware linux 7.1.
> > >
> > > I have a table with about 25 milion records:
> > >
> > > create table gsc_act(reg_id int2,id int2,ra int4,
> > de
> > > int4,mag int2);
> > >
> > > i created 2 indexes:
> > >
> > > create index gsc_act_de on gsc_act(de);
> > > create index gsc_act_rd on gsc_act(de,ra);
> > >
> > > so every thing was ok with queries:
> > > 1. select * from gsc_act where de>=-300000
> > >    and de<300000 and ra<=600000 and ra>=0;
> > > 2. select * from gsc_act where de>=-300000
> > >    and de<300000 and ra<=600000 and ra>=0
> > >    and mag<300;
> > >
> > > except the second one was too slow and I created
> > third
> > > index:
> > >
> > > create index gsc_act_rdm on gsc_act(de,ra,mag);
> > >
> > > I executed query 2 and it hang for 5-6 min with
> > > permanent disk activity even Ctrl-C could not stop
> > it.
> > > I killed postmaster and droped the third index.
> > Now
> > > both queries hang the same way. Is there any way
> > to
> > > fix it? This are the most used queries with the
> > > table(only the values are different).
> > > Is this some bug in postgres?
> > > Please help!
> >
> >
> > .
> > me bug in postgres?
> > > Please help!
> >
> >
> > .
> >
>
>
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