Good morning, Much love for haproxy and many thanks to all who have worked on and contributed to it. We have been using it for several years without issue. However, we have been doing load testing lately and there appears to be a bottleneck. It may not even have to do with haproxy (i dont think it does) but i need to double check anyways just to be thorough and cover all our bases.
Hardware: VM running on ESXi, it has 2gigs RAM allocated to it, and 2 CPU's GuestOS: CentOS 5 Haproxy version: 1.4.8 (however, we just upgraded to 1.4.19 last night) Problem: "second_proxy" is getting hammered by a load test, site performance decreases to the point where the site is barely usable and the majority of pages time out. however, go to a different site that is in the same haproxy config listening on "http_proxy" going to the same backend server, and the site comes up fine and fast. it seems like something is being throttled or queued somewhere. its possible that it could be an issue behind haproxy on the app servers, but i just want to make sure there is nothing i need to tweak in my config. Here is a snapshot of the haproxy stats page for the slow pool "second_proxy" http://tinypic.com/r/15887qf/5 here is my haproxy.cfg global maxconn 8096 daemon nbproc 1 stats socket /var/run/haproxy.stat defaults clitimeout 600000 srvtimeout 600000 contimeout 9000 option httpclose log 127.0.0.1 local0 log 127.0.0.1 local1 notice listen http_proxy 11.10.15.108:80 mode http acl acl_www18 url_sub www18dir #these are here so we can test an individual server acl acl_www19 url_sub www19dir acl acl_wwwkj3 url_sub wwwkj3dir acl acl_wwwkj5 url_sub wwwkj5dir use_backend www18 if acl_www18 use_backend www19 if acl_www19 use_backend wwwkj3 if acl_wwwkj3 use_backend wwwkj5 if acl_wwwkj5 cookie EWNSERVERID insert balance leastconn option httpchk HEAD /check.txt HTTP/1.0 option forwardfor server EWN-www18 11.10.15.18:80 cookie server18 weight 10 maxconn 2000 check port 8081 server EWN-www19 11.10.15.19:80 cookie server19 weight 10 maxconn 2000 check port 8081 server EWN-wwwkj3 11.10.15.191:80 cookie serverkj3 weight 10 maxconn 2000 check port 8081 server EWN-wwwkj5 11.10.15.194:80 cookie serverkj5 weight 10 maxconn 2000 check port 8081 stats enable stats auth (user):(pass) listen second_proxy 11.10.15.108:8181 mode http acl acl_www18 url_sub www18dir #these are here so we can test an individual server acl acl_www19 url_sub www19dir acl acl_wwwkj3 url_sub wwwkj3dir acl acl_wwwkj4 url_sub wwwkj4dir acl acl_wwwkj5 url_sub wwwkj5dir acl acl_wwwkj6 url_sub wwwkj6dir acl acl_wwwkj7 url_sub wwwkj7dir acl acl_wwwkj8 url_sub wwwkj8dir use_backend www18 if acl_www18 use_backend www19 if acl_www19 use_backend wwwkj3 if acl_wwwkj3 use_backend wwwkj4 if acl_wwwkj4 use_backend wwwkj5 if acl_wwwkj5 use_backend wwwkj6 if acl_wwwkj6 use_backend wwwkj7 if acl_wwwkj7 use_backend wwwkj8 if acl_wwwkj8 cookie EWNSERVERID insert balance leastconn option httpchk HEAD /check.txt HTTP/1.0 option forwardfor server EWN-www18 11.10.15.18:80 cookie server18 weight 10 maxconn 2000 check port 8081 server EWN-www19 11.10.15.19:80 cookie server19 weight 10 maxconn 2000 check port 8081 server EWN-wwwkj3 11.10.15.191:80 cookie serverkj3 weight 10 maxconn 2000 check port 8081 server EWN-wwwkj4 11.10.15.196:80 cookie serverkj4 weight 10 maxconn 2000 check port 8081 server EWN-wwwkj5 11.10.15.194:80 cookie serverkj5 weight 10 maxconn 2000 check port 8081 server EWN-wwwkj6 11.10.15.197:80 cookie serverkj6 weight 10 maxconn 2000 check port 8081 server EWN-wwwkj7 11.10.15.192:80 cookie serverkj7 weight 10 maxconn 2000 check port 8081 server EWN-wwwkj8 11.10.15.193:80 cookie serverkj8 weight 10 maxconn 2000 check port 8081 stats enable stats auth (user):(pass) Backends then follow but i have omitted as those are only used when we are trying to test an individual server
