Mike Taulty's Blog
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August 16, 2007 - Mike Taulty's Blog

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  • Who's Spinning my disk so hard? "SuperFetch"

    I'm sitting a my laptop and the disk is spinning like a demon and I'm wondering why? I'm not "doing anything" and so it worries me that my disk is whirring and whirring. Maybe this is irrational but it does. I bring up the Resource Monitor and I find that it's a svchost.exe process that is doing a tonne of i/o on the pagefile (Resource Monitor is good for this stuff). This puzzles me. Why should I be doing so much paging activity when I'm not "doing anything"? Then (I think) I figure it out. I run up a console, do a "net stop superfetch". Almost immediately the pagefile activity stops. Inside of the past few mintues, I'd shut down a VPC image. This was taking 1.5GB of memory so I'm guessing that when all that memory becomes available, SuperFetch kicks into gear and starts trying to pro-actively bring pages into memory. So, if your laptop's noisy try looking at the Search service and the SuperFetch service to quieten it down a little. Note: I'm sure this wouldn't happen if I was on battery power and I know that...