hornet-js-gc-monitor

hornet-gc-monitor

Nodejs v8 garbage collector monitoring

This package is tested only with Node versions 0.10, 0.12 and 4.x

Note: This module currently works only on Linux operating systems.

GC statistics reporting

This module collects GC statistics and put them into a Javascript Object : Here is the list of data the module reports periodically:

  {
    "total": {
      "count": 10,
      "time": 47.908777
    },
    "scavenge": {
      "count": 8,
      "time": 41.046463,
      "maxtime": 7.650448
    },
    "marksweep": {
      "count": 2,
      "time": 6.862314,
      "maxtime": 6.859382
    }
  }

The object is stored into the "process" object with a customizable key (default: "gcMonitor").

Installation

With npm do:

npm install hornet-gc-monitor

Usage

var hornetGcMonitor = require("hornet-gc-monitor");
 
// start without argument > statistics available at : process.gcMonitor
hornetGcMonitor.start();
var gcStatistics = process.gcMonitor;
 
// or start with argument. ex: statistics available at process.customKey
hornetGcMonitor.start("customKey"); 
var gcStatistics = process.customKey;