As part of optimizing our sites for performance I'm worried about the amount of resources involved with removing cached files vs generating new ones.
What would you recommend setting the expiry time for cached files on a site doing 50000+ pageviews a day with 7000+ posts? (mod_rewrite).
We're offloading comments to Facebook so that's not an issue, and using an object cache (WP Widget Cache).
I currently have the pages set to expire every 2 days and performance is okay but just okay. Should I increase/decrease this or leave it as it do you think?
Opinions would be great thanks :)