On 06/14/2011 02:27 AM, Jeff Janes wrote: > On Mon, Jun 13, 2011 at 7:03 AM, Stefan Kaltenbrunner > <ste...@kaltenbrunner.cc> wrote: > ... >> >> >> so it seems that sysbench is actually significantly less overhead than >> pgbench and the lower throughput at the higher conncurency seems to be >> cause by sysbench being able to stress the backend even more than >> pgbench can. > > Hi Stefan, > > pgbench sends each query (per connection) and waits for the reply > before sending another. > > Do we know whether sysbench does that, or if it just stuffs the > kernel's IPC buffer full of queries without synchronously waiting for > individual replies? > > I can't get sysbench to "make" for me, or I'd strace in single client > mode and see what kind of messages are going back and forth.
yeah sysbench compiled from a release tarball needs some autoconf/makefile hackery to get running on a modern system - but I can provide you with the data you are interested in if you tell me exactly what you are looking for... Stefan -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
