On Tue, Mar 18, 2008 at 8:51 PM, Skye Poier Nott <skye@xxxxx> wrote: > Hi, > > I am doing some load testing on a reverse proxy with apache 2.2 + > mod_proxy and I'm getting terrible throughput, I was wondering if > anyone had a suggestion. > > I have the following config, all on gigabit ethernet: > > 1 origin server -> 2 mod_proxy servers -> 4 client simulators (flood) > > The origin and proxy servers are configured with 100 name-based > virtual hosts, the proxy servers with config like this: > > <VirtualHost *:80> > ServerName w0099.example.com > ProxyPass / http://10.100.10.XX:80/w0099/ > ProxyPassReverse / http://10.100.10.XX:80/w0099/ > </VirtualHost> > > > When I start up flood on the client simulators (250 clients each), I > only get about 4 Mbit/sec out of the origin server. I've tried > twiddling all the settings in mod_proxy to no avail (like smax=64 > max=512 ttl=120 min=8 acquire=1) > > If I set up lighttpd on the proxy servers, I fully saturate the gigE > on the origin server (~500 Mbit/sec) > > What could explain this 125x difference in performance? Is there some > sort of resource or lock or something contention in mod_proxy that I > should know about? I'm not a mod_proxy performance expert (and you might need to ask on the dev@httpd list to find one), but you should start with the basics: have you looked at the mod_status server-status output? Are you exceeding MaxClients? Is there anything interesting in the error log? Joshua. --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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