On Mon, Nov 5, 2012 at 2:58 PM, Marko Kreen <markokr@xxxxxxxxx> wrote: > On Sun, Nov 4, 2012 at 1:53 AM, Jeff Janes <jeff.janes@xxxxxxxxx> wrote: >> On a 4 CPU machine, if I run pgbench -c10 -j10 with dummy queries >> (like "select 1;" or "set timezone...") against 2 instances of >> pgbouncer, I get nearly twice the throughput as if I use only one >> instance. >> >> A rather odd workload, maybe, but it does seem to be similar to the >> one that started this thread. > > Every-connection-is-busy is pessimal workload for pgbouncer, > as it has nothing useful to contribute to setup, just overhead. It still has something to contribute if connections are made and broken too often (pgbench -C type workload), as seems to be the case here. If he can get an application-side pooler (or perhaps just a change in configuration) such that the connections are not made and broken so often, then removing pgbouncer from the loop would probably be a win. Cheers, Jeff -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
