My ASP.NET application has some 32-bit DLLs I can't change. I've deployed the application to a 64-bit Windows 2003 server and I can get it to run if I enable 32-bit ASP.NET support.
My question: is this configuration worth it? Or would I be better off just running it on a Windows 32-bit Server? Even more specifically, can a 32-bit application running on 64-bit Windows take advantage of the extra RAM the machine might have?
There's really no disadvantage in running 32 bit application pool on a 64 bits system.
With 64 bits OS, the OS will address more than 4 G of memory which can be useful in some situation. It really depends on your setup, if your server only runs IIS and it only host 1 website, having more than 4G of RAM is not really useful.
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