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I'm currently copying six large files across a 100MBit/s network from my Windows XP system to a Windows 2003 server. My PC is rather unresponsive and when I look at perfmon, I see that PhysicalDisk and Processor is bouncing around 20% but memory (pages/sec) is at solid maximum.

What is causing this? I thought the memory monitor was a generally indicating how much virtual memory page was being used.

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Later... hmm, the copy failed to finish (will switch to using robocopy) - it looked like the Windows 2003 server fell off the network briefly. tcpsvcs.exe is consuming 600MB of RAM and a quick Google on this indicates this isn't unknown. Still intruiged why the client Windows XP system was thrashing memory –  Rob Nicholson Nov 25 '09 at 22:54

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How large are the files? Have a look at Slow Large File Copy Issues. This thread discusses it a bit more with some work-arounds and such. I've switched to using RichCopy when copying large files.

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The files were huge video files - about 30GB. Will check out richcopy. Often used robocopy but always on look out for good alternatives. –  Rob Nicholson Dec 13 '09 at 13:28

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