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    usage-nan

    0.4.10 • Public • Published

    node-usage Build Status

    process usage lookup with nodejs

    • Simple interface to lookup cpu and memory usage of any accessible process on the system.
    • Works on OSX, Linux, SmartOS and Solaris
    • Tested on Heroku, Nodejitsu and Modulus

    Example

    Code

    var usage = require('usage');
    
    var pid = process.pid // you can use any valid PID instead
    usage.lookup(pid, function(err, result) {
    
    });

    Result Object

    {
    	cpu: 10.6, //in percentage
    	memory: 100065280 //in no of bytes
    }

    Average CPU usage vs Current CPU usage

    This is only applicable for Linux

    By default CPU Percentage provided is an average from the starting time of the process. It does not correctly reflect the current CPU usage. (this is also a problem with linux ps utility)

    But If you call usage.lookup() continuously for a given pid, you can turn on keepHistory flag and you'll get the CPU usage since last time you track the usage. This reflects the current CPU usage.

    see following example to enable keepHistory flag

    var pid = process.pid;
    var options = { keepHistory: true }
    usage.lookup(pid, options, function(err, result) {
    
    });

    you can clear history cache too

    usage.clearHistory(pid); //clear history for the given pid
    usage.clearHistory(); //clean history for all pids

    Install

    npm i usage-nan

    DownloadsWeekly Downloads

    1

    Version

    0.4.10

    License

    none

    Last publish

    Collaborators

    • mirrr