Oh, here's my ha proxy config https://gist.github.com/802098
and here's why my haproxy status looks like shortly after the test http://dl.dropbox.com/u/1165308/haproxy.png On Sat, Jan 29, 2011 at 11:53 AM, Sean Hess <s...@i.tv> wrote: > I'm performing real-world load tests for the first time, and my results > aren't making a lot of sense. > > Just to make sure I have the test harness working, I'm not testing "real" > application code yet, I'm just hitting a web page that simulates an IO delay > (500 ms), and then serializes out some json (about 85 bytes of content). > It's not accessing the database, or doing anything other than printing out > that data. My application servers are written in node.js, on 512MB VPSes on > rackspace (centos55). > > Here are the results that don't make sense: > > https://gist.github.com/802082 > > When I run this test against a single application server (bottom one), You > can see that it stays pretty flat (about 550ms response time) until it gets > to 1500 simultaneous users, when it starts to error out and get slow. > > When I run it against an haproxy instance in front of 4 of the same nodes > (top one), my performance is worse. It doesn't drop any connections, but the > response time edges up much earlier than against a single node. > > Does this make any sense to you? Does haproxy need more RAM? I was watching > the box while the test was running and the haproxy process didn't get higher > than 20% CPU and 10% RAM. > > Please help, thanks!
