A lot of hosting providers recycle application pools after a short period of inactivity - this ram is then available to any sites on the same server that have active requests. This is a good way to maximise the performance of sites (or the number of sites per server, which is good for host provider profits but not good for users with a small number of users [their app pools get recycled more often]). This may well be the issue in your case. By adding a "keep-alive" page you're actually working around the ISP solution as it fools IIS into thinking a site is still active.

Without further details it's impossible to say whether your site is using too much RAM or else that your hosting provider has too many sites on the server or unrealistic RAM expectations i.e. some hosts only allow 30MB ram per site, some give 50 or 100MB (or even more). I would start by asking your host provider what their RAM allocation per site is, and how much RAM you've been using.

Cathal

Thank you both for responsing.  My host provider is saying that one of my web sites is using 100mb memory - this does seem like a lot.  The site is not a large web site - or is 100MB o.k.?

If I am using too much memory - what should I look at to decrease my memory usage?

Again thanks for the help because they are really on my back!

Judy