1.0.0 • Published 11 years ago
heapdumper v1.0.0
Utility to debug memory usage of NodeJS processes.
Based on heapdump.
Usage
Requiring the module will activate it. It has no functions.
require("heapdumper");
Now, your process will dump a .heapsnapshot
file to its current directory
if you send it the USR2
signal.
Example use, where the program myserverthing.js
uses heapdumper
:
$ node myserverthing.js &
[1] 4955
$ kill -s USR2 4955
USR2 received - creating .heapdump file in /home/helge/proj/heapdumper
$ ls
heapdump-3808509.864648.heapsnapshot
heapdump-3808509.864648.log
myserverthing.js
node_modules
$
Install
The module is available via NPM.
npm install heapdumper
Inspecting the .heapsnapshot
files
Chrome/Chromium has a profiling tool to visually inspect the heap: Chrome heap profiling
Quick recipe: Open Chrome, open dev tools, go to "profiles tab", right click in the tool area and select "Load profile". Navigate to the generated .heapsnapshot
file and open it. Enjoy.
1.0.0
11 years ago