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Re: Querying 19million records very slowly

From: Kjell Tore Fossbakk <kjelltore(at)gmail(dot)com>
To: Tobias Brox <tobias(at)nordicbet(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Querying 19million records very slowly
Date: 2005-06-23 13:31:13
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
-I also changed now() to current_time, which increased performance quite 
good. I need to make further tests, before I'll post any results.
-I tried to change now()- interval 'x hours' to like 2005-06-22 16:00:00+02. 
This also increased the performance.
 changing to time > '2005-06-22 16:00:00+02' (or what ever date is 24 hours 
back) or time > current_time - interval '24 hours' will be used.
 I'm running FreeBSD 4.11, and im editing the file in 
/usr/local/etc/postgresql.conf, but it doesnt help. When i start up "psql 
database", none of the options are changed (with a restart of the 
postmaster). I cant find a '--configuration=path/file' option for the 
postmaster either...
 Kjell Tore
 On 6/22/05, Tobias Brox <tobias(at)nordicbet(dot)com> wrote: 
> [Kjell Tore Fossbakk - Wed at 07:41:54AM -0700]
> > I cant get the config file to load into my postgres. that's the
> > problem. I want to set it to 10k, but it is only still at 1000... I
> > save the file and restart the service..
> >
> > yes, i ment 'pg_ctl reload', sry about that one.
> Classical problem, a bit depending on the distro you are using.
> The "master" file usually resides in /etc/postgresql while the actual file
> used usually resides in /var/lib/postgres/data ... or something. Some
> distros copies over the file (such that one always should edit the file in
> /etc) others don't (thus you either have to do that your self, or edit the
> file in the database data directory.
> --
> Tobias Brox, +86-13521622905
> Nordicbet, IT dept

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