I did a little more digging and found several blogs that suggest that I will take a performance hit on virtual platforms. In fact, this guy (http://www.mail-archive.com/[email protected]/msg03119.html) seems to have the same problem. The part that is concerning me is not the overall performance, but that I am getting worse performance with 4 servers than I am with 1 server. I realize there are a lot of complications, but I have to be doing something very wrong to get a decrease.
I have even tried putting haproxy on the same server with 2 tomcat servers and used 127.0.0.1 to take as much of the network out as possible. I still get a lower number of requests per second when going through haproxy to the 2 tomcats (as opposed to going directly to one of the tomcats). This test is using ab locally on the same machine. I have tried all of the sysctl settings that I have found listed on the board. Is there anything I am missing?? I appreciate the help, Les Stroud On Oct 6, 2010, at 3:56 PM, Les Stroud wrote: > I’ve figured I would find answers to this in the archive, but have been > unable to. So, I appreciate the time. > > I am setting up an haproxy instance in front of some tomcat instances. As a > test, I ran ab against one of the tomcat instances directly with an > increasing number of concurrent connections. I then repeated the same test > with haproxy fronting 4 tomcat servers. I was hoping to see that the haproxy > setup would perform a higher number of requests per second and hold that > higher number with increasingly high traffic. Unfortunately, it did not. > > Hitting the tomcat servers directly, I was able to get in excess of 3700 > rqs/s. With haproxy in front of that tomcat instance and three others (using > roundrobin), I never surpassed 2500. I also did not find that I was able to > handle an increased amount of concurrency (both started giving errors around > 20000). > > I have tuned the tcp params on the linux side per the suggestions I have seen > on here. Are there any other places I can start to figure out what I have > wrong in my configuration?? > > Thanx, > LES > > > ——— > > haproxy.cfg > > global > #log loghost local0 info > maxconn 500 > nbproc 4 > stats socket /tmp/haproxy.sock level admin > defaults > log global > clitimeout 60000 > srvtimeout 30000 > contimeout 4000 > retries 3 > option redispatch > option httpclose > option abortonclose > > listen stats 192.168.60.158:8081 > mode http > stats uri /stat #Comment this if you need to specify diff > stat path for viewing stat page > stats enable > listen erp_cluster_https 0.0.0.0:81 > mode http > balance roundrobin > option forwardfor except 0.0.0.0 > reqadd X-Forwarded-Proto:\ https > cookie SERVERID insert indirect > server tomcat01-instance1 192.168.60.156:8080 cookie A check > server tomcat01-instance2 192.168.60.156:18080 cookie A check > server tomcat02-instance1 192.168.60.157:8080 cookie A check > server tomcat02-instance2 192.168.60.157:18080 cookie A check
