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Thread ID: 19177	2002-05-10 05:04:00	virtual memory	Guest (0)	Press F1

Post ID	Timestamp	Content	User
48076	2002-05-10 05:04:00	I was scanning a picture at 750 dpi resolution at scanning and output was 600 dpi. It took a hell of a long time nearly 40 minutes- my PC is Duron 950 CPU & has got 256 MB memory & runs Win XP HE. After that when I was trying to put that picture on the desktop, the system froze. Then a message came on the right bottom saying that the system has low 'virtual memory' and it was doing something on it.... Could someone explain to me why with a resonably good system with high memory etc. was doing like that? This is purely out of interest to learn. regards mukesh	Guest (0)
48077	2002-05-10 05:13:00	It took so long because the file was enormous. Generally you dont need to scan at that resolution, you will only see a tiny portion of it on your screen. 75dpi or 100 dpi is adequate unless you really need to scan something with fine detail. Have a look at this scantips site: <www.scantips.com	Guest (0)
48078	2002-05-10 06:24:00	Try the arithmetic. 750 pixels/inch means 750X750 for each 1 inch square. If you are using colour, that will be 3 bytes per pixel. So a 6' x 4' picture would be about a 40.5MB file. Your 256 MB of ram holds the operating system, and the scanning software, and any other programmes you have started up ... The scanning programme will probably use a couple of copies of the scan too --- to allow for manipulation of the image. High resolution uses LOTS of memory. If it doesn't exist in real form,, it is 'made' as virtual memory on the hard disk. That's a LOT slower.	Guest (0)
48079	2002-05-10 20:29:00	Terry, thanks for your help. It was quite revealing and informative. Thanks mate mukesh	Guest (0)
48080	2002-05-12 06:43:00	Dear Graham What then should be the highest & the lowest virtual memory settings that I should make in my PC. Please tell me. regards mukesh	Guest (0)
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