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POUnmanaged VC++ Application's memory consumption on windows server
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copied!<p>OK, so I have a very large multi-threaded unmanaged c++ application (server) that runs on a windows 2003 server. It hosts sessions for 20-50 concurrent users doing all sorts of business logic... At times it can be using a very large amount of memory due to things like object/session caching due to users having large numbers of windows open in the clients (each window has a separate server 'session'. </p> <p>We routinely see consumption of more than 5-600 MB physical memory and 5-600 MB of virtual memory. Once it gets to this point we seem to start having 'out of memory' errors.</p> <p>Now I know that Windows will start page-faulting when it feels it needs to free up physical memory, and also that win32 applications normally are only able to allocate up to a maximum of 4GB worth of memory, really only with 2GB of that available for actual use by the application for 'user-mode' address space, and even less of that after other libraries are loaded... I'm not sure if the 'user-mode' memory usage is what is reported on the Task Manager...</p> <p><strong>So anyway my real question is:</strong></p> <p><strong>How can I find out how much user-mode memory my application has access to, and how much has been used at any given time (preferably from outside of the application, i.e. some windows management tool)?</strong></p> <p>[edit] After looking at the Process Explorer and the website, it looks like the value 'Virtual Size' is the value of how much memory the application has access to.</p>

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