I'm optimizing a site by using lighttpd for the static media. I've found that a recommended solution is to use Apache Proxy to point to the lighttpd server. But, does that use up an Apache thread/process per request?
In my setup, I've noticed that all my processes are used up, even though they aren't doing anything, CPU wise. To free up apache processes, I've configured lighttpd and the amount of processes needed is lowered significantly, Munin shows.
However, I've set it up to connect directly to lighty, to prevent apache workers from being occupied by serving static media. My question is: when using Apache Proxy, does that also use up a process/worker per request?