I would start by reading this web page:
http://powerpostgresql.com/PerfList
There are probably some other web pages out there with similar information,
or you can check the mailing list archives for a lot of info. If those
places don't help, then you should try to indentify what queries are slow,
post an EXPLAIN ANALYZE of the slow queries along with the relvent schema
info (i.e. table definitions and indexes).
> -----Original Message-----
> From: pgsql-performance-owner@postgresql.org
> [mailto:pgsql-performance-owner@postgresql.org] On Behalf Of
> Nuno Alves
> Sent: Wednesday, September 20, 2006 10:28 AM
> To: pgsql-performance@postgresql.org
> Subject: [PERFORM] running benchmark test on a 50GB database
>
>
> Hi,
>
> I am running bechmark test in a 50 GB postgresql database.
> I have the postgresql.conf with all parameters by default.
> In this configuration the database is very, very slow.
>
> Could you please tell which is the best configuration?
>
> My system:
> Pentium D 3.0Ghz
> RAM: 1GB
> HD: 150GB SATA
>
> Thanks in advance,
> Nuno
>
> ---------------------------(end of
> broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>