Sender: lockhart@hub.org
Message-ID: <377191AF.BE5F54A@alumni.caltech.edu>
Date: Thu, 24 Jun 1999 02:02:23 +0000
From: Thomas Lockhart <lockhart@alumni.caltech.edu>
MIME-Version: 1.0
To: Steven Bradley <sbradley@llnl.gov>
CC: pgsql-interfaces@postgreSQL.org
Subject: Re: [INTERFACES] Performance
References: <3.0.5.32.19990623150509.0092e990@poptop.llnl.gov>
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> Is it unrealistic to expect Postgres to insert on the order of 100 
> records per second on a Pentium 400 MHz/SCSI class machine running 
> Linux?  (Solaris on a comparable platform has about 1/2 the 
> performance)

I'd expect roughly equivalent performance on different platforms. I
measured the insert performance a couple of years ago and found
roughly 50 inserts per second on my dual processor, 180MHz PPro
system, which was the same performance as I had on an Ingres
installation on a medium-speed Alpha/OSF-1 box.

Without knowing more about your memory and disk setup, I'll guess that
you can use more memory, can bump buffer size by using "-B 1024" or
something similar, and running without mandatory fsync() (use the "-F"
option). However, istm that your system should do better than 10ips
before you invoke "-F", otherwise you'll just be working around
another underlying problem/bottleneck.

Good luck.

                   - Thomas

-- 
Thomas Lockhart				lockhart@alumni.caltech.edu
South Pasadena, California