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I am designing hardware requirements for ASP.NET web application. When it comes to memory, how much RAM does a web server need to work efficiently (use full processing power of CPUs)? Are there any approximations of GB RAM per core or something like that?

The application is a classic intranet one, with lots of heavy ASP.NET stuff (ViewState) and very few static content, so it is more CPU-bound.

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The good people at ServerFault might be more qualified to help you; also, the requirements depend greatly on the applications that will run on your server (not all web applications are similar in resource requirements). Can you be a bit more specific about the apps you're planning to host there? –  Piskvor Sep 17 '10 at 9:03
    
-1: Needs real performance data to answer this with anything more than "it depends". –  Richard Sep 17 '10 at 9:52
    
No chance to answer this correctly without more details. How many concurrent request, sql data binding, etc... –  Andreas Rehm Sep 17 '10 at 10:12
    
512GB for a webserver is fine. If there are no users! Please provide us with more details: How many concurrenty users do you want to support? How does the server perform in your dev and test environments? –  Guy Sep 17 '10 at 10:32
    
16TB will probably be enough, at least for starters. If you care to supply useful information we can probably give you a better estimate. –  John Gardeniers Sep 17 '10 at 11:08

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depends what kind of website and how much users/ hits/minute. Does it run a DB as well? i think with 4GB (which isnt expensive these days) you'll be able to have some serious traffic :)

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It is quite possible that a server doing mostly calculations could saturate lots of cores and the network before using much memory. A different style of usage would have different requirements. So the only answer with the given information is "it depends". –  Richard Sep 17 '10 at 9:51

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