On Mon, May 16, 2011 at 01:54:06PM -0400, Jeff wrote: > Yep - you need multiple threads to get max throughput of your io. I am running: ~/pgiosim -c -b 100G -v -t4 file[0-9]* Will each thread move 100GB of data? I am seeing: 158.69%, 4260 read, 0 written, 3407.64kB/sec 425.95 iops Maybe the completion target percentage is off because of the threads? -- -- rouilj John Rouillard System Administrator Renesys Corporation 603-244-9084 (cell) 603-643-9300 x 111 -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance