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I was looking at System Monitor on Linux and noticed that Firefox is using 441 MB of memory, and several other applications are using 274, 257, 232, etc (adding up to over 3 GB of virtual memory). So I switch over to the Resources tab, and it says I'm using 462 MB of memory and not touching swap. I'm confused. What does the virtual memory amount mean then if the programs aren't actually using it. I was thinking maybe memory they've requested but aren't using, but how would the OS know that? I can't think of any "I might need this much memory in the future" function..
Extra credit reading and here.
– Paused until further notice. – 2010-04-05T00:46:53.760I know how virtual memory works, my question is why does the "virtual memory" size listed not add up (not even close)? My (apparently naive) assumption was that if it said I was using 3 GB of virtual memory, then some combination of memory usage and swap usage should add up to 3 GB.. – Brendan Long – 2010-04-05T02:16:19.600
Is "virtual memory usage" listing cached files? – Brendan Long – 2010-04-05T17:09:21.857