On Mon, Apr 16, 2012 at 10:31 AM, Glyn Astill <glynast...@yahoo.co.uk> wrote: >> From: Scott Marlowe <scott.marl...@gmail.com> >>On Mon, Apr 16, 2012 at 8:13 AM, Cesar Martin <cmart...@gmail.com> wrote: >>> Hi, >>> >>> Finally the problem was BIOS configuration. DBPM had was set to "Active >>> Power Controller" I changed this to "Max >>> Performance". http://en.community.dell.com/techcenter/power-cooling/w/wiki/best-practices-in-power-management.aspx >>> Now wirite speed are 550MB/s and read 1,1GB/s. >> >>Why in the world would a server be delivered to a customer with such a >>setting turned on? ugh. > > > Because it's Dell and that's what they do. > > > When our R910s arrived, despite them knowing what we were using them for, > they'd installed the memory to use only one channel per cpu. Burried deep in > their manual I discovered that they called this "power optimised" mode and I > had to buy a whole extra bunch of risers to be able to use all of the > channels properly. > > If it wasn't for proper load testing, and Greg Smiths stream scaling tests I > don't think I'd even have spotted it.
See and that's where a small technically knowledgeable supplier is so great. "No you don't want 8 8G dimms, you want 16 4G dimms." etc. -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
