It sounds like you are using mod_perl and mod_proxy on the same main httpd, is that right?
If so, consider running another front end proxy such as apache with the event_mpm, perlbal, ha_proxy, or nginx. Without having more details (Devel::NYT::Prof may provide some), my guess is that you are blocking on child httpds in mod_proxy. On Thu, May 27, 2010 at 12:36 PM, Joshua Johnson <joshpauljohn...@gmail.com> wrote: > Hello all, > > I have a question on using mod_perl to configure apache for many virtual > hosts. My problem is the high load on the apache server. I decided to go > with mod_perl to configure apache and here are the reasons (if I should be > doing this a different way, please say so. I'm open to suggestions).: > > The company I work at has ~13,000 customer domains. There is a database > where these domains are configured. Some of them are "standard" packages and > simply have a document root where customers upload pages. Some of the > domains make proxy requests to another site. And still others make a proxied > rewrite from "/" to "some random url that is stored in the db". Some > redirect to another url. There are about 20 other such configurations. > > I used mod_perl to load all of this up at startup and it worked beautifully. > I originally thought that I would be able to dynamically setup VirtuaHost > sections as requests came in for domains (maybe they were freshly added to > the db or the record updated). But I found you can't really do that so I > have to restart for changes to take effect. Either way, I'm very happy with > how easy and clean mod_perl has made all of this. > > But the load on apache runs anywhere from 0.50 to 3.00 on a dual cpu server. > Response doesn't seem slow (except for right after an apache restart) but > I'm worried that I'm doing something fundamentally wrong. There is a > significant amount of proxying going on so I set "ProxyReceiveBufferSize > 16384" but that doesn't seem to have changed too much. Could mod_perl be the > cause of the load or would it be the end apache config? Are there any > initial thoughts anyone has? Has anyone run into something similar? Should I > be going about this a different way? > > Related: and would it be possible to add config on-the-fly? $r->add_config() > Won't let you add VirtualHosts because it operates as though in a <Location> > directive. > > I guess I'm just looking for thoughts in general. I've been tinkering with > this for about 2 weeks now. > > Thanks, > Josh J > >
