mem-stat

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 |   Y   |   _   |   Y   |   _   |       |   _   |       |
 |.      |.  1___|.      |   1___|.|   | |.  1   |.|   | |
 |. \_/  |.  __)_|. \_/  |____   `-|.  |-|.  _   `-|.  |-'
 |:  |   |:  1   |:  |   |:  1   | |:  | |:  |   | |:  |
 |::.|:. |::.. . |::.|:. |::.. . | |::.| |::.|:. | |::.|
 `--- ---`-------`--- ---`-------' `---' `--- ---' `---'

Note: This repo can be found on npm here: mem-stat

Note: This repo can be found on github here: node-mem-stat

Caveat: Works by parsing /proc/meminfo, so will only work on nix OS.

Install

npm install mem-stat

Example

Require the module:

var memStat = require('mem-stat');

By default free() returns values in bytes:

var free = memStat.free();
console.log(free);

Return free memory in GiB, see docs below for allowed values of units:

var free = memStat.free('GiB');
console.log(free);

usedPercent() returns the percentage memory used eg. 13.359272:

var usedPercent = memStat.usedPercent();
console.log(usedPercent);

Get all the calculated statistics, requiring only one read and parse of /proc/meminfo:

var allStats = memStat.allStats();
console.log(allStats);
  {
    free: 1000,
    total: 8000,
    freePercent: 86.245977,
    usedPercent: 13.754023,
  }

Get all fields available from /proc/meminfo formatted as an object, see docs below for example of all the fields:

var raw = memStat.raw();
console.log(raw);
``

``
//or use the callback style
memStat.raw(function(err, raw) {
  if (err) {
    return console.log(err);
  }
  console.log(raw);
});

free(units)

Returns the amount of free memory in units available on the system.

Option | Type | Default | Explanation ------------- | -------------| ------------- | ------------ units | String | 'bytes' | The units of the returned value, can be one of bytes, KiB, MiB or GiB.

total(units)

Returns the amount of total memory in units available on the system. It's basically the same as os.totalmem(), but instead using /proc/meminfo.

Option | Type | Default | Explanation ------------- | -------------| ------------- | ------------ units | String | 'bytes' | The units of the returned value, can be one of bytes, KiB, MiB or GiB.

freePercent()

Returns the amount of free memory as a percentage eg 83.9430437.

usedPercent()

Returns the amount of used memory as a percentage eg 13.9430437.

allStats(units)

Returns an object of all the stats, therefore only requiring one reading and parsing of /proc/meminfo.

  {
    free: 1000,
    total: 8000,
    freePercent: 86.245977,
    usedPercent: 13.754023,
  }

Option | Type | Default | Explanation ------------- | -------------| ------------- | ------------ units | String | 'bytes' | The units of the returned value, can be one of bytes, KiB, MiB or GiB.

raw([cb])

Returns an object representing the data in /proc/meminfo.

Option | Type | Default | Explanation ------- | -------------| ------------------------------------------------ | ------------ cb | Function | If no callback is specified, uses sync file read | Gives the user the option of using a callback style interface.

  {
    memTotal: 8114892,
    memFree: 794140,
    memAvailable: 5879036,
    buffers: 385952,
    cached: 4597408,
    swapCached: 10992,
    active: 4288952,
    inactive: 2453264,
    activeAnon: 1197680,
    inactiveAnon: 592184,
    activeFile: 3091272,
    inactiveFile: 1861080,
    unevictable: 32,
    mlocked: 32,
    swapTotal: 1951740,
    swapFree: 1930036,
    dirty: 212,
    writeback: 0,
    anonPages: 1748032,
    mapped: 378400,
    shmem: 31012,
    slab: 418628,
    sReclaimable: 385960,
    sUnreclaim: 32668,
    kernelStack: 6800,
    pageTables: 32020,
    nFSUnstable: 0,
    bounce: 0,
    writebackTmp: 0,
    commitLimit: 6009184,
    committedAS: 6138892,
    vmallocTotal: 34359738367,
    vmallocUsed: 120844,
    vmallocChunk: 34359595004,
    hardwareCorrupted: 0,
    anonHugePages: 370688,
    hugePagesTotal: 0,
    hugePagesFree: 0,
    hugePagesRsvd: 0,
    hugePagesSurp: 0,
    hugepagesize: 2048,
    directMap4k: 237136,
    directMap2M: 5992448,
    directMap1G: 2097152
  }

Contributing

Just send a PR, or create an issue if you are not sure.

Areas ripe for contribution:

• testing
• cross compatability for windows and darwin/osx
• performance
• bugs

Other Stat Modules

• cpu-stat npm git
• net-stat npm git
• disk-stat npm git
• mem-stat npm git

Note: net-stat, disk-stat, mem-stat only work on nix platforms.

License

MIT