Here's a bit more anecdotal info on multi-processor systems- We've got one system with Tyan motherboard & 2 1.2 GHz Athlon processors, SCSI Raid, 1 GB RAM. We're running Debian Linux 2.4.17 & Postgres 7.2.1. We're happy with the performance, & both processors are being used by postgresql. We haven't seen all of the RAM used yet, but I'm confident that the OS is equipped to use it & just think we haven't challenged it enough.
On the downside, our backup machine with the same configuration doesn't work. Since the other one is performing flawlessly, I'm assuming we have a bad hardware component somewhere. I've also run a 4 processor Xeon box with 2GB RAM at a previous job, and I wasn't impressed, but it was running NT & Oracle so the comparison is very approximate. I would encourage you to strongly consider the Athlon processors if you're trying to reduce cost. From what I've read elsewhere, it sounds like you may get comparable performance with a dual Athlon vs a Quad Xeon. Also remember that in a server-class Sun box, you've got a nice I/O channel by default, but in an Intel/AMD box, you may need to think hard about I/O & make some choices there as well. -Nick > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Andreas Schmitz > Sent: Friday, September 27, 2002 3:43 AM > To: [EMAIL PROTECTED] > Subject: Re: [ADMIN] hardware question > > > > Hello *, > > thanks a lot for the quick responses. It looks like I have to > answer a few > questions. > > - I am talking about P4 Xeon > - Getting away from SUN is the attemp to reduce costs. I think I > don't have to > mention the amount of money that has to be spent on service > contracts (even > with older machines). > > I don't really like to change from multi CPU SUNs to Intel boxes. > My Problem > is that I don't know much about the behavior of Intel Xeons and I > fear to run > into a performance bottleneck even with databases >5Gb. I've one > P4 Dual Xeon > box running with oracle 9i. The system shows 4 CPUs that seems to > be typical > for Xeon. Will postgres use this a a 4 CPU machine ? Is there any > HT support > ? > > regards > > -andreas > > > -- > Andreas Schmitz - Phone +49 201 8501 318 > Cityweb-Technik-Service-Gesellschaft mbH > Friedrichstr. 12 - Fax +49 201 8501 104 > 45128 Essen - email [EMAIL PROTECTED] > > > ---------------------------(end of broadcast)--------------------------- > TIP 4: Don't 'kill -9' the postmaster > ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/users-lounge/docs/faq.html
