Difference between MemFree and MemAvailable

[mkirollos]

Description	This article describes What is the difference between MemFree and MemAvailable in the outcome of 'get hardware memory' on a FortiAuthenticator
Scope	FortiAuthenticator.
Solution	The outcome of 'get hardware memory' shows details about memory usage, below is a truncated output to show the different memory listings. # get hard memory ### Memory info MemTotal: 2045120 kB MemFree: 277804 kB MemAvailable: 902488 kB Buffers: 281252 kB Cached: 383324 kB SwapCached: 92 kB Active: 424232 kB Inactive: 750248 kB Active(anon): 45636 kB Inactive(anon): 525384 kB Active(file): 378596 kB Inactive(file): 224864 kB The difference between MemFree and MemAvailable is as follows: - MemFree is the total amount of unused physical memory (RAM). - MemAvailable is the estimated amount of RAM usable for the system and new app to start without caches, it is MemFree + reclaimable memory blocks like those inactive pages, etc.