On Fri, 2009-04-03 at 16:34 -0700, David Kerr wrote: > 400 concurrent users doesn't mean that they're pulling 1.5 megs / > second every second. Just that they could potentially pull 1.5 megs at > any one second. most likely there is a 6 (minimum) to 45 second > (average) gap between each individual user's pull. There's a world of difference between 400 connected and 400 concurrent users. You've been testing 400 concurrent users, yet without measuring data transfer. The think time will bring the number of users right down again, but you really need to include the much higher than normal data transfer into your measurements and pgbench won't help there. -- Simon Riggs www.2ndQuadrant.com PostgreSQL Training, Services and Support -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance