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Old 11-11-2007, 03:48 AM   #1
Registered: Oct 2007
Posts: 66

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Thumbs up Difference between resident memory,shared memory and virtual memory in system monitor

hai all
i have used system monitor tool to find the memory usage.its giving virtual memory,resident memory,shared memory and what does memory mean?is it ram consumption?i also want to know abt the difference between memories comsumption listed in the system monitor tool.

thanks in advance
Old 11-11-2007, 04:05 AM   #2
Registered: May 2007
Location: London, UK.
Distribution: Major:FC8. Others:Debian;Zenwalk; Arch; Slack; RHEL.
Posts: 544

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You have not supplied your distro so I'm not sure what your sysmon looks like.


resident memory typically refers to physical RAM installed in the machine.

virtual memory is Hard Disk space reserved for the O/S to act as RAM. The O/S "swaps" data in and out of the virtual memory to place it in RAM, or to take it out of RAM. linux "swap" devices are exactly this.

shared memory refers to physical or virtual memory that is attached to more than one process - being shared.


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