ASP.NET Website Memory Usage quite high

Question

I have an ASP.NET website that will hit about 2gb physical memory used within about 3-4 days, which to me sounds really bad. At the moment, I have configured IIS to restart

Answer 1

Whilst it is true that you don't have to explicitly free memory and the garbage collector will do this for you it is possible for code in inadvertently hold a reference to an object to prevent it being collected - this is essentially a memory leak.

In ASP.NET objects remain "alive" whilst they are referenced by the Application and Session cache. Without knowing anything about your application I would suggest you get hold of a memory profiler and look more closely at exactly what is in memory and whether the Application or Session cache is holding onto something it shouldn't.