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Add additional documentation for heap snapshot flag #28754

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13 changes: 13 additions & 0 deletions doc/api/cli.md
Original file line number Diff line number Diff line change
Expand Up @@ -216,6 +216,19 @@ reference. Code may break under this flag.
added: v12.0.0
-->

Enables a signal handler that causes the Node.js process to write a heap dump
when the specified signal is received.

```console
$ node --heapsnapshot-signal=SIGUSR2 index.js &
$ ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
node 1 5.5 6.1 787252 247004 ? Ssl 16:43 0:02 node --heapsnapshot-signal=SIGUSR2 index.js
$ kill -USR2 1
$ ls
Heap.20190718.133405.15554.0.001.heapsnapshot
```

### `--heap-prof`
<!-- YAML
added: v12.4.0
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