Re: top memory usage question
On Thu, May 27, 2010 at 12:52 PM, Coert wrote: > Hello all, > > Just a question, on Linux the output of top's memory usage looks like this: > > Mem: 2075424k total, 1760848k used, 314576k free, 151872k buffers > Swap: 4192924k total, 0k used, 4192924k free, 1214052k cached > > > on FreeBSD: > > Mem: 48M Active, 945M Inact, 190M Wired, 112M Buf, 804M Free > Swap: 4063M Total, 4063M Free > > > I have looked at the respective man pages, and googled. > Where can I find out what Active, Inactive, and Wired mean? > The differences have to do with the way memory is managed. Active memory is currently is RAM and is being used by a currently running process. Inactive is in RAM but is not currently being used. Wired means that the page is locked into ram and won't be paged out. Look at http://en.wikipedia.org/wiki/Paging and http://en.wikipedia.org/wiki/Virtual_memory for more info -- Eitan Adler ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: top memory usage question
On Thu, 27 May 2010 11:52:15 +0200 Coert wrote: > Hello all, > > Just a question, on Linux the output of top's memory usage looks like > this: > > Mem: 2075424k total, 1760848k used, 314576k free, 151872k > buffers Swap: 4192924k total,0k used, 4192924k free, > 1214052k cached > > > on FreeBSD: > > Mem: 48M Active, 945M Inact, 190M Wired, 112M Buf, 804M Free > Swap: 4063M Total, 4063M Free This is missing Cache > I have looked at the respective man pages, and googled. > Where can I find out what Active, Inactive, and Wired mean? Active, Inact, Cache , and Free are all part of the same VM lifecycle. When the system need to allocate memory it comes from cache or free. Wired memory wont be paged-out. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
