I'm not completely clear on how all this works, but I'm having an issue where a site is very slow to display after not being visited for a few hours. The first visit every couple of days seems very slow. Same thing applies to pages with .net controls (contact form)

I got a dedicated app pool to try and avoid this scenario. I have another site which shares an app pool, and I get offline notifications a couple of times a month. My web host suggested that another site sharing the app pool could be taking it offline.

As I understand it the first time a site is loaded after the web.config has been modified, it can take a while as everything gets compiled(?). I don't think this is the case here as I hadn't touched it for a day or so.

This is probably a stupid question, but would a web host 'sleep' a site that is not getting any traffic, then wake it back up as soon as it's requested?

Is there anything I can try, or ask them to check/change for me?