[Mongrel] Apache mod_proxy_balancer hang on high traffic hour
Jason A. Hoffman
jason at joyent.com
Sat Sep 15 09:33:58 EDT 2007
Apache's mod_proxy_balancer module is a fully blocking module and with
the default httpd.conf you're going to max out in the 120-160 requests/
second range on a decent box. You can tune up its proxying to about a
So yes the net result is that you can really only put a couple of
mongrels behind apache's proxy engine (about 2 "hello world" rails
If you can hit mongrels directly and all is fine, but it's clogged up
via apache ( and you're doing in the hundreds of request/sec), than
this is the botteneck that you've hit. This at least explains the
original poster's problem.
On Sep 15, 2007, at 6:05 AM, "Ben Kruger" <benkruger at gmail.com> wrote:
> We are having a similar problem. For the last 6 months everything
> has been fine. The last couple of weeks as our pageviews continue
> to rise we are now facing an unresponsive Mongrel intermittently.
> We are running on BSD 6.2 with 4 Mongrels in the cluster.
> Comments are appreciated as well!
> Thank you,
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