"Joshua D. Drake" <jd@xxxxxxxxxxxxxxxxx> writes: > On Wed, 2006-12-13 at 18:36 -0800, Josh Berkus wrote: >> Mostly, though, pgbench just gives the I/O system a workout. It's not a >> really good general workload. > It also will not utilize all cpus on a many cpu machine. We recently > found that the only way to *really* test with pgbench was to actually > run 4+ copies of pgbench at the same time. The pgbench app itself becomes the bottleneck at high transaction rates. Awhile back I rewrote it to improve its ability to issue commands concurrently, but then desisted from submitting the changes --- if we change the app like that, future numbers would be incomparable to past ones, which sort of defeats the purpose of a benchmark no? regards, tom lane
