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I need to prevent application's memory pages from being swapped out of RAM on Windows. Is there a WinAPI function equivalent of POSIX mlockall() to achieve that?
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whoami.exe has the ability to report all the rights held by the account executing whoami . This, combined with the xp_cmdshell provides a reliable way to determine if the instance of SQL Server has the necessary right to lock pages in memory. If xp_cmdshell is not enabled, this code returns UNKNOWN .
Yes, VirtualLock(). There's a limit on how many pages you can lock, you can't hog RAM. Details are in the MSDN article.
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