Re: Help specifying new machine
От | Rod Taylor |
---|---|
Тема | Re: Help specifying new machine |
Дата | |
Msg-id | 1092845543.32799.145.camel@jester обсуждение исходный текст |
Ответ на | Re: Help specifying new machine (Raoul Buzziol <raoulus@libero.it>) |
Список | pgsql-performance |
On Wed, 2004-08-18 at 11:18, Raoul Buzziol wrote: > > You're not going to be able to get a Dual Athlon MP for the same price > > as a single Xeon. A few years back, this was the case because Xeon CPUs > > & MBs had a huge premium over Athlon. This is no longer true mainly > > because the number of people carrying Athlon MP motherboards has dropped > > down drastically. Go to pricewatch.com and do a search for 760MPX -- you > > get a mere 8 entries. Not surprisingly because who would not want to > > spend a few pennies more for a much superior Dual Opteron? The few > > sellers you see now just keep stuff in inventory for people who need > > replacement parts for emergencies and are willing to pay up the nose > > because it is an emergency. > > I saw pricewatch.com and you're right. > > I looked for some benchmarks, and I would know if I'm right on: > - Dual Opteron 246 have aproximately the same performance of a Dual Xeon 3Gh > (Opteron a little better) > - Opteron system equal or cheeper than Xeon system. For PostgreSQL, Opteron might be a touch worse than Xeon for single processor, little better for Dual, and a whole heck of a bunch better for Quads -- but this depends on your specific work load as memory bound, cpu bound, lots of float math, etc. work loads will perform differently. In general, an Opteron is a better bet simply because you can shove more ram onto it (without workarounds), and you can't beat an extra 8GB ram on an IO bound database (consider your datasize in 1 year).
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