On Tue, 2007-05-08 at 14:04, MaRCeLO PeReiRA wrote: > Hi there, > > Actually my PostgreSQL server is running on a Athlon > XP 1800+, 512Mb RAM, IDE Disks, 10/100 netcard. > > I would like to buy a new server, could you please > give me some information about the specs?? > > Is it important to have a Dual (or even Quad) > processor??? Will PostgreSQL use them?? > > What about memory??? How much??? > > SCSI Disks and 10/100/1000 netcards, it's ok!! No > doubt! > > It's a medium use server, about 3000 transactions/day. Assuming that most of your transactions happen from 9-5, then that's about 6 transactions per second. Assuming these are mostly lightweight transaction, you'll be needing a pentium 100 with 64 megs of ram. :) Seriously though, the hardware you need / want REALLY depends on your usage patterns. Are you doing a lot of CPU intensive stuff, where having more CPUs or faster / more memory would help, or are you mostly I/O bound, and in need of a faster disk subsystem. Dual CPUs are almost always a good thing, as there's enough going on other than pgsql (the OS and all its processes) that having a second CPU can make a machine noticeably more responsive. After that, it's hard to say. PostgreSQL itself can only use 1 cpu per connection max, plus one for things like th background writer or periodic vacuuming. So, if you've only got one user at a time ever hitting your DB, then multiple CPUs wouldn't help. Here's what I recommend for a db server: Lots of memory 2 CPUs (more if needed, maybe dual core x 2) battery backed caching RAID controller. Look at Areca, 3Ware/Escalade, and LSI Lots of hard disks for said controller fast, efficient NIC. Better to spend a little more in a quality NIC with a low CPU overhead.
