You can also determine how many chunks of memory are available in each zone using /proc/buddyinfo file ( cat /proc/buddyinfo). Notice that 64-bit systems no longer use high memory. Following is the output of 32 bit and 64 bit systems. Using the -l option, you can see how much memory is used in each memory zone. c Displays the free output number of times Listing the Memory zone l Distinguishes between low and high memory b, -k, -m, -g Display values in bytes, kilobytes, megabytes, and gigabytes Below is the screen-caps of free command output stats (system with 4GB of RAM)įree command include the following syntax : When using free, remember the Linux memory architecture and the way the virtual memory manager works. Helpful for the admins to get the quick information about the memory usage in their servers. It also includes information about the buffers and cache used by the kernel. The command /bin/free or /usr/bin/free displays information about the total amount of free and used memory ( including swap) on the system.
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