Thread: Looking for hw suggestions for high concurrency OLTP app
Hi all, I'd like to get suggestions from all you out there for a new Postgresql server that will replace an existing one. My performance analysis shows very *low* iowaits, and very high loads at times of peak system activity. The average concurrent processes number is 3/4, with peaks of 10/15. *Sustained* system load varies from 1.5 to 4, while peak load reaches 20 and above, always with low iowait%. I see this as a clear sign of more processors power need. I'm aware of the context-switching storm problem, but here the cs stays well under 50,000, so I think it's not the problem here. Current machine is an Acer Altos R700 (2 Xeon 2.8 Ghz, 4 Gb RAM), similar to this one (R710): http://www.acer.co.uk/acereuro/page9.do?sp=page4&dau34.oid=7036&UserCtxParam=0&GroupCtxParam=0&dctx1=17&CountryISOCtxParam=UK&LanguageISOCtxParam=en&ctx3=-1&ctx4=United+Kingdom&crc=334044639 So, I'm looking for advice on a mid-range OLTP server with the following (flexible) requirements: - 4 physical processors expandable to 8 (dual core preferred), either Intel or AMD - 8 Gb RAM exp. to at least 32 Gb - Compatibility with Acer S300 External storage enclosure. The "old" server uses that, and it is boxed with 15krpm hdds in RAID-10, which do perfectly well their job. The enclosure is connected via 2 x LSI Logic PCI U320 controllers - On-site, same-day hardware support contract - Rack mount Machines we're evaluating currently include: - Acer Altos R910 - Sun Fire V40Z, - HP Integrity RX4640 - IBM eServer 460 Experiences on these machines? Other suggestions? Thanks. -- Cosimo
The Sun X4600 is very good for this, the V40z is actually EOL so I'd stay away from it. You can currently do 8 dual core CPUs with the X4600 and 128GB of RAM and soon you should be able to do 8 quad core CPUs and 256GB of RAM. - Luke On 12/11/06 8:26 AM, "Cosimo Streppone" <cosimo@streppone.it> wrote: > Hi all, > > I'd like to get suggestions from all you out there for > a new Postgresql server that will replace an existing one. > > My performance analysis shows very *low* iowaits, > and very high loads at times of peak system activity. > The average concurrent processes number is 3/4, with peaks of 10/15. > *Sustained* system load varies from 1.5 to 4, while peak load > reaches 20 and above, always with low iowait%. > I see this as a clear sign of more processors power need. > > I'm aware of the context-switching storm problem, but here > the cs stays well under 50,000, so I think it's not the problem > here. > > Current machine is an Acer Altos R700 (2 Xeon 2.8 Ghz, 4 Gb RAM), > similar to this one (R710): > http://www.acer.co.uk/acereuro/page9.do?sp=page4&dau34.oid=7036&UserCtxParam=0 > &GroupCtxParam=0&dctx1=17&CountryISOCtxParam=UK&LanguageISOCtxParam=en&ctx3=-1 > &ctx4=United+Kingdom&crc=334044639 > > So, I'm looking for advice on a mid-range OLTP server with > the following (flexible) requirements: > > - 4 physical processors expandable to 8 (dual core preferred), > either Intel or AMD > - 8 Gb RAM exp. to at least 32 Gb > - Compatibility with Acer S300 External storage enclosure. > The "old" server uses that, and it is boxed with 15krpm hdds > in RAID-10, which do perfectly well their job. > The enclosure is connected via 2 x LSI Logic PCI U320 controllers > - On-site, same-day hardware support contract > - Rack mount > > Machines we're evaluating currently include: > - Acer Altos R910 > - Sun Fire V40Z, > - HP Integrity RX4640 > - IBM eServer 460 > > Experiences on these machines? > Other suggestions? > > Thanks.
On 12/11/06, Luke Lonergan <llonergan@greenplum.com> wrote: > The Sun X4600 is very good for this, the V40z is actually EOL so I'd stay > away from it. also, it has no pci express slots. make sure to get pci-e slots :) > You can currently do 8 dual core CPUs with the X4600 and 128GB of RAM and > soon you should be able to do 8 quad core CPUs and 256GB of RAM. ...and this 6 of them (wow!). the v40z was top of its class. Will K8L run on this server? merlin
Merlin, On 12/11/06 12:19 PM, "Merlin Moncure" <mmoncure@gmail.com> wrote: > ...and this 6 of them (wow!). the v40z was top of its class. Will K8L > run on this server? No official word yet. The X4600 slipped in there quietly under the X4500 (Thumper) announcement, but it's a pretty awesome server. It's been in production for supercomputing in Japan for a long while now, so I'd trust it. - Luke