fix(metrics): correct maxrss metrics on macos

[skyzh]

Problem

macOS max_rss is in bytes, while Linux is in kilobytes. https://stackoverflow.com/a/59915669

Summary of changes

Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• Do we need to implement analytics? if so did you add the relevant metrics to the dashboard?
• If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section.

Checklist before merging

• Do not forget to reformat commit message to not include the above checklist

[github-actions]

2766 tests run: 2645 passed, 0 failed, 121 skipped (full report)

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Code coverage* (full report)

• functions: 28.1% (6481 of 23045 functions)
• lines: 47.0% (46049 of 97988 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
f093831 at 2024-04-24T15:17:14.747Z :recycle:}

[problame]

Hm, ru_maxrss on Linux also is in unit kilobytes

https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/getrusage.2.html
https://man7.org/linux/man-pages/man2/getrusage.2.html

[skyzh]

oh, i mean it's bytes in macOS, and therefore we need to / 1024 on macOS to convert it to kilobytes.

[koivunej]

https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man2/getrusage.2.html

There seems to be a difference between ios (which you linked) and macosx (for which man pages are not online?): https://stackoverflow.com/a/59915669

[koivunej]

It would be nice to have the macosx man pages online, but there are other sources.

[problame]

There seems to be a difference between ios (which you linked) and macosx (for which man pages are not online?): https://stackoverflow.com/a/59915669

Indeed, confirmed on my mac.

Would be nice to include that remark in a comment / commit message

[skyzh]

added in f093831