i'd like to ask a clarification about Preload function in WP Super Cache.
I'm using WP-SuperCache on a low-traffic website, just because my hoster has VERY slow mysql servers. I've enabled the standard cache, with an expiration time of 3600 seconds.
Now i was thinking to increase the expiration time (24 hours?) to maximize cache hits (i have a very low number of articles, less than 100 and 4 pages).
But have also enabled Preload. As i've understood, preload ALWAYS keeps a copy of every page on my blog.
So the question is: if the preload always keeps a cached copy of every page, why should i also set normal cache expiration time?
And, speaking of articles and pages, what's the link between preload refresh time and normal expiration time? If i have an expire time of 60 minutes and a preload refresh interval of 120 minutes, my preload cache will be rebuilt every 60 minutes, right?
Thankyou and sorry for my mental confusion