On Sat, Mar 19, 2016 at 4:29 AM, Scott Marlowe <scott.marlowe@xxxxxxxxx> wrote: > Given the size of your bonnie test set and the fact that you're using > RAID-10, the cache should make little or no difference. The RAID > controller may or may not interleave reads between all four drives. > Some do, some don't. It looks to me like yours doesn't. I.e. when > reading it's not reading all 4 disks at once, but just 2, 1 from each > pair. Point of clarification. It may be that if two processes are reading the data set at once you'd get a sustained individual throughput that matches what a single read can get. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
