There are a number of caching instances in the Pro Sites' code. These check if the user is a pro sites user (1 hour), or if the site is a pro site (3 hours) ... as well as extensions, free trials, and so on.
I would like to shorten these time periods. Can someone please help me understand why the plugin caches, and how changing it will affect my MU install? Will it put a strain on the server? Is there a ratio of caching to subsites/pages/posts that I could implement.
I assume these caching instances were included because Edublogs has 1+ million subsites. For my MU install, I anticipate < 1,000 subsites. How does that affect my decision to reduce the amount of time caching?