I have installed the mod_pagepseed module for Apache.

I am using Debian so I downloaded the .deb file, and installed it successfully. I then configured some filters, and it worked like a charm for some minutes.

Then after something like 10 minutes, my website no longer responded to the requests. When I was requesting for my website, it said "Waiting for www.blablabla.com" and I never got the page back from the server.

I checked the processes running on my Debian box with top -d 0.5, and nothing eats up the CPU.

To make my website responding to requests again, I must do a /etc/init.d/apache2 restart.

And then it works again with mod_modspeed applying it's filters for a couple of minutes, and no more response again.

How can I diagnose this issue? Is there some other configurations in the mod_pagespeed.conf file that I must set?