We're running into an issue only on our test server that seems to be a result of the page output being cached. It usually lasts about 15 minutes before it's cleared. I can't seem to find anything out there on it. I know there's a cache module available, but it doesn't seem to be compiled. Here's the result of apache2 -l:
$ Compiled in modules:
core.c
mod_log_config.c
mod_logio.c
prefork.c
http_core.c
mod_so.c

If this isn't a result of the output being cached by apache, what else could be happening?

Thanks.