Ryan Wexler <ryan@xxxxxxxxxxxxxxxx> writes: > Postgresql was previously running on a single cpu linux machine with 2 gigs > of memory and a single sata drive (v8.3). Basically a desktop with linux on > it. I experienced slow performance. > So, I finally moved it to a real server. A dually zeon centos machine with > 6 gigs of memory and raid 10, postgres 8.4. But, I am now experiencing even > worse performance issues. I'm wondering if you moved to a kernel+filesystem version that actually enforces fsync, from one that didn't. If so, the apparently faster performance on the old box was being obtained at the cost of (lack of) crash safety. That probably goes double for your windows-box comparison point. You could try test_fsync from the Postgres sources to confirm that theory, or do some pgbench benchmarking to have more quantifiable numbers. See past discussions about write barriers in this list's archives for more detail. regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
