On Monday 16 March 2009, Joe Uhl <joe...@gmail.com> wrote: > Right now (not under peak load) this server is running at 68% CPU > utilization and its SATA raid 10 is doing about 2MB/s writes and 11MB/ > s reads. When I run dd I can hit 200+MB/s writes and 230+ MB/s reads, > so we are barely using the available IO. Further when I run dd the > CPU utilization of that process only approaches 20%-30% of one core.
What does vmstat say when it's slow? The output of "vmstat 1 30" would be informative. note: dd is sequential I/O. Normal database usage is random I/O. -- Even a sixth-grader can figure out that you can’t borrow money to pay off your debt -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
