In this section you will learn how to get overall memory information (usage by OS) and memory module layout:

For function reference and examples we assume, that we imported systeminformation as follows:

const si = require('systeminformation');

System Memory and Memory Layout

All functions in this section return a promise or can be called with a callback function (parameter cb in the function reference)

Function	Result object	Linux	BSD	Mac	Win	Sun	Comments
si.mem(cb)	{...}	X	X	X	X	X	Memory information (object)
	total	X	X	X	X	X	total memory in bytes
	free	X	X	X	X	X	not used in bytes
	used	X	X	X	X	X	used (incl. buffers/cache)
	active	X	X	X	X	X	used actively (excl. buffers/cache)
	buffcache	X	X	X		X	used by buffers+cache
	available	X	X	X	X	X	potentially available (total - active)
	swaptotal	X	X	X	X	X
	swapused	X	X	X	X	X
	swapfree	X	X	X	X	X
si.memLayout(cb)	[{...}]	X	X	X	X		Memory Layout (array of objects)
	[0].size	X	X	X	X		size in bytes
	[0].bank	X	X		X		memory bank
	[0].type	X	X	X	X		memory type
	[0].clockSpeed	X	X	X	X		clock speed
	[0].formFactor	X	X		X		form factor
	[0].manufacturer	X	X	X	X		manufacturer
	[0].partNum	X	X	X	X		part number
	[0].serialNum	X	X	X	X		serial number
	[0].voltageConfigured	X	X		X		voltage conf.
	[0].voltageMin	X	X		X		voltage min
	[0].voltageMax	X	X		X		voltage max