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
