On Mon, Jan 31, 2005 at 09:41:32PM +0100, Cosimo Streppone wrote: > 2) The goal is to make the db handle 100 tps (something like > 100 users). What kind of server and storage should I provide? > > The actual servers our application runs on normally have > 2 Intel Xeon processors, 2-4 Gb RAM, RAID 0/1/5 SCSI > disk storage with hard drives @ 10,000 rpm
You might look at Opteron's, which theoretically have a higher data bandwidth. If you're doing anything data intensive, like a sort in memory, this could make a difference. > 4) Is it correct to suppose that multiple RAID 1 arrays > can provide the fastest I/O ? > I usually reserve one RAID1 array to db data directory, > one RAID1 array to pg_xlog directory and one RAID1 array > for os and application needs. RAID10 will be faster than RAID1. The key factor to a high performance database is a high performance I/O system. If you look in the archives you'll find people running postgresql on 30 and 40 drive arrays. -- Jim C. Nasby, Database Consultant [EMAIL PROTECTED] Give your computer some brain candy! www.distributed.net Team #1828 Windows: "Where do you want to go today?" Linux: "Where do you want to go tomorrow?" FreeBSD: "Are you guys coming, or what?" ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
