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doc: add note on process memoryUsage #59026

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doc: add rss leak note on process memoryUsage
fengmk2 Jul 11, 2025
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Update process.md
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doc: add rss leak note on process memoryUsage
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@fengmk2
fengmk2 authored Jul 11, 2025
commit bc4086867258f2956cbe0343a0f572fbbc7edf07
5 changes: 5 additions & 0 deletions doc/api/process.md
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Expand Up @@ -2807,6 +2807,11 @@ The `process.memoryUsage()` method iterates over each page to gather
information about memory usage which might be slow depending on the
program memory allocations.

### A note on process memoryUsage

Once you notice that the `rss` continues to rise while the `heapTotal` shows normal, and the `rss` is more than three times higher than the `heapTotal`, it is very likely that there is an issue with an external memory leak.
Referer to the discussions in [nodejs/node#21973](https://github.com/nodejs/node/issues/21973) and [nodejs/help#1942](https://github.com/nodejs/help/issues/1942) for suggestions on switching the system's default `malloc` to `jemalloc` to try to resolve such issues.

## `process.memoryUsage.rss()`

<!-- YAML
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