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Behind Windows 7 excessive memory usage

February 21, 2010 Leave a comment Go to comments

The recently reported claims of excessive memory use on machines running Windows 7 has been looked into by Ars Technica.

I installed the XPnet performance monitoring tool and waited for it to upload my data to see what it might be complaining about. The cause of the problem was immediately apparent. It’s no secret that Windows 7, just like Windows Vista before it, includes aggressive disk caching.

The SuperFetch technology causes Windows to preload certain data if the OS detects that it is used regularly, even if there is no specific need for it at any given moment. Though SuperFetch is a little less aggressive in Windows 7, it will still use a substantial amount of memory—but with an important proviso. The OS will only use memory for cache when there is no other demand for that memory.


  1. November 4, 2010 at 9:12 am

    sometimes windows7 won’t install if you install it on a pc with a previous installation of windows XP .

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