Refer the below link to understand /proc/meminfo http://www.redhat.com/advice/tips/meminfo.html --- "Crawford, Andrew (IT)" <Andrew.Crawford@xxxxxxxxxxxxxxxxx> wrote: > Dear all, > > I'm trying to understand the data in /proc/meminfo. > > MemTotal: 8258560 kB > MemFree: 17116 kB > MemShared: 0 kB > Buffers: 27976 kB > Cached: 7739640 kB > SwapCached: 0 kB > Active: 6474448 kB > ActiveAnon: 270376 kB > ActiveCache: 6204072 kB > Inact_dirty: 1240656 kB > Inact_laundry: 241704 kB > Inact_clean: 131008 kB > > Am I wrong in believing that > > MemFree = MemTotal - Buffers - SwapCached - Active - > Inact_dirty - Inact_laundry > - Inact_clean - (some space for the > kernel itself) > > In other words, the things which use up memory are > > * Buffers > * Stuff swapped out but still in RAM > * Active pages > * Inactive pages > * Some kernel space > > What am I missing? Because if we try this with the > numbers above we get: > > 17116 = 8258560 - 27976 - 0 - 6474448 - 1240656 - > 241704 - 131008 - X > > 17116 = 142768 - X > > X = 125662 > > This would suggest that "space for the kernel > itself" on this machine is 122MB. That seems like > quite a lot considering I run the same version at > home on a machine with 16MB total RAM! > > What's going on here? Anyone? > > Supplemental question: If "Cached" is meant to be > the whole size of the page cache (minus Buffers for > some reason), how come all the active pages + all > the inactive pages - Buffers adds up to way more > than Cached? > > Cheers, > > Andrew > -------------------------------------------------------- > > NOTICE: If received in error, please destroy and > notify sender. Sender does not waive > confidentiality or privilege, and use is prohibited. > > > > -- > Kernelnewbies: Help each other learn about the Linux > kernel. > Archive: > http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > > __________________________________ Do you Yahoo!? Check out the new Yahoo! Front Page. www.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
