![]() ![]() ![]() Unlike the data provided by the cache or free fields, this field takes into account page cache and also that not all reclaimable memory slabs will be reclaimed due to items being in use (MemAvailable in /proc/meminfo, available on kernels 3.14, emulated on kernels 2.6. On kernels 2.6.32, displayed as zero if not available)īuffers Memory used by kernel buffers (Buffers in /proc/meminfo)Ĭache Memory used by the page cache and slabs (Cached and Slab inĪvailable Estimation of how much memory is available for starting new applications, without swapping. Shared Memory used (mostly) by tmpfs (Shmem in /proc/meminfo, Does Ubuntu run faster than Windows In Ubuntu, Browsing is faster than Windows 10. Used Used memory (calculated as total - free - buffers - cache)įree Unused memory (MemFree and SwapFree in /proc/meminfo) This command is used to check information about the RAM usage by your system. ![]() Total Total installed memory (MemTotal and SwapTotal in /proc/meminfo) Method 1: The free command Since the free command is the most widely used and, without any doubt, the most helpful, we will mention its usage first. displays the total amount of free and used physical and swap memory in the system, as well as the buffers and caches used by the kernel. The man page of free highlights used as Used memory (calculated as total - free - buffers - cache) For the main memory, the actual size of memory can be calculated as used+free+buffers+cache OR used+free+buffers/cache because buffers/cache = buffer+cache. ![]()
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