I've been playing around with the caching settings on my EE site. I'm getting really good server response times and the getting the number of queries right down which is perfect.
I've always avoided caching due to content 'being out of date', but I realise if you have the config value 'new_posts_clear_caches' set to 'y' then each time there is a new post or one gets edited or a new comment is added then the cache is cleared.
My question is about the cache expiry times. I've been defaulting to 60 mins but now I'm thinking that if the cache is cleared when new content is posted then why not set this much higher - 24 hours or so? Is there a downside to this?
I have some tags which really don't need updating much at all - category lists for example.
Obviously, I'm not caching any parts which vary based on member login etc...
What do people set their cache times to?