>     I have been given a dual PIII with 768MB RAM and I am going to install
> PostgreSQL on it, for data warehousing reasons. I have also been given four
> 160 Ultra SCSI disks (36MB each) with a RAID controller (Adaptec 2100). I
> am going to use a RAID5 architecture (this gives me approximately 103 GB of
> data) and install a Debian Linux on it: this machine will be dedicated
> exclusively to PostgreSQL.

FWIW, RAID5 with < 5 disks is probably the worst-performing disk setup for PG 
with most kinds of DB applications.   However, with 4 disks you don't have a 
lot of other geometries available.    If the database will fit on one disk, I 
might suggest doing RAID 1 for 2 of the disks, and having two single disks, 
one with the OS and swap, and one with the database log.

If you're doing Debian, make sure to get a current version of PG from Debian 

>     I was wondering which file system you suggest me: ext3 or reiserfs?

These seem to be equivalent in data=writeback mode for most database 
applications.   Use whichever you find easier to install & maintain.

> Also, I was thinking of using the 2.6.x kernel which offers a faster thread
> support: will PostgreSQL gain anything from it or should I stick with
> 2.4.x?

PostgreSQL won't gain anything from the thread support (unless you're using a 
threaded front-end app with thread-safe ecpg).   But it will gain from 
several other improvements in 2.6, especially better scheduling and VM 
support.  Use 2.6.

Josh Berkus
Aglio Database Solutions
San Francisco

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