Memory Lite

Description

Memory Lite is a simple, bare-bones package for monitoring NodeJS memory usage using the console.

Table of Contents

• Installation
• Usage
• Arguments
• Contribute
• Support

Installation

Memory Lite can be installed using the package manager of your choosing. The example command below uses yarn.

$ yarn add memory-monitor

Usage

Usage is extremely straightforward -- 1) import the package, and 2) initialized the monitor. Memory Lite can be used without passing any arguments, however all arguments and their defaults are shown below:

// <app-entry-point>.ts
import memoryMonitor from 'memory-lite';

memoryMonitor({
    interval: 10000,
    rss: true,
    heapTotal: true,
    heapUsed: false,
    external: false,
    arrayBuffers: false
});

With this default setup, the following will be output to the console at 10 second intervals (numbers shown are arbitrary):

rss: 21.9 MiB | heapTotal: 4.6 MiB

If all boolean arguments set to true, the following will be output to the console:

rss: 22.9 MiB | heapTotal: 4.9 MiB | heapUsed: 4.3 MiB | external: 294.7 KiB | arrayBuffers: 43.7 KiB

Arguments

| Name | Default | Description | | -------------- | ------------ | ---------------------------------------------------------------------------------------------------------------------------------- | | interval | 10000 (ms) | The sampling rate expressed as time between sample (and subsequent logging) events. | | rss | true | Determines whether or not rss should be included in the output. | | heapTotal | true | Determines whether or not heapTotal should be included in the output. | | heapUsed | false | Determines whether or not heapUsed should be included in the output. | | external | false | Determines whether or not external should be included in the output. | | arrayBuffers | false | Determines whether or not arrayBuffers should be included in the output. |

Contribute

Contribution is welcome, although there is probably little more to be done. Some options include:

• add ability to toggle monitor off and on
• create options that allow for logs to be more queryable and traceable within a logging aggregator
• save output to a variable for actionable checks (i.e. usage notifications, etc.)

These would constitute fairly large changes and may even warrant packages of their own, however they are valid ideas for improving the utility of this package.

Support

• Buy me a coffee
• Read my writing