We have a site with huge usage of Memory, this site is in .NET FrameWork 3.5 and hosted in IIS 7.5 With App Pool .NET2 in Classic mode on Windows Server 2008 R2. In this case the server memory (RAM) is 64G and in 4-5 hours all the memory allocated. and the most used memory process is w3wp. For some reasons we can't change the code or change classic mode to integrated.
And the question is what options we have to improve memory usage without change the code? any suggestion?