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Operating Systems

Submission Is Video RAM a good swap device?

sean4u writes: I use a 'lucky' (inexplicably still working) headless desktop PC to serve pages for a low-volume e-commerce site. I came across a page and this page that suggested the interesting possibility of using the Video RAM of the built-in video adapter as a swap device or RAM disk. The instructions worked a treat, but I'm curious as to how good a substitute this can be for swap space on disk. In my (amateurish) test, hdparm -t tells me the Video RAM block device is 3 times slower than the aging disk I currently use.
What performance do other slashdotters get? Is the poor performance report from hdparm a feature of the hardware, or the Memory Technology Device driver? What do slashdotters use to measure swap performance?

One of the chief duties of the mathematician in acting as an advisor... is to discourage... from expecting too much from mathematics. -- N. Wiener