Scott Marlowe <scott.marlowe@xxxxxxxxx> wrote: > Jennifer Spencer<jenniferm411@xxxxxxxxxxx> wrote: >> new ones coming have 5 TB each of RAID disks mirrored across to >> another 5TB (20 5.4gb spinning disks). Not sure the RAID level but >> I think it's level six. They each have 16 CPUs, and (I believe) >> 128 Gb of RAM, connected to our NFS network on a 10g switch (at >> least I think it's the 10 gigabit switch - it might be one >> gigabit). > get a battery backed cache if you can. I'd say that with the rest of the hardware described, performance will be very disappointing without a good RAID controller with battery backed cache configured for write-back. Also, file system (we use XFS) and mount options (we use noatime and nobarrier), and elevator (we use deadline) can make a big difference. -Kevin -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
