On Mon, Oct 8, 2012 at 7:25 PM, Craig James <cjames@xxxxxxxxxxxxxx> wrote: >> > But why? What have I overlooked? >> >> Do you have readahead properly set up on the new one? > > > # blockdev --getra /dev/sdb1 > 256 It's probably this. 256 is way too low to saturate your I/O system. Pump it up. I've found 8192 works nice for a system I have, 32000 I guess could work too. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
