1822317 - Mention available/configured swapfile size in about:support

Status: NEW

(Toolkit :: General, enhancement, P3)

Description

[Gian-Carlo Pascutto [:gcp]]

From the investigation in https://bugzilla.mozilla.org/show_bug.cgi?id=1716727 and similar bugs, we know swapfile sizing is critical on Windows due to how the allocator behaves.

about:support currently mentions physical memory size, but we know from the above this isn't necessarily the most relevant metric.

It would also help diagnosing issues like:
https://bugzilla.mozilla.org/show_bug.cgi?id=1809763#c11

Lastly, if we detect swapfile < physical memory size, we could even consider highlighting that in red in about:support, as we know the machine is basically misconfigured.

Comment 1

[Gabriele Svelto [:gsvelto]]

I believe that "swapfile < physical memory size" is going to be common in machines with lots of physical memory and automatic pagefile adjustment. But maybe Ray/David/Bob would know more about this than me.

Comment 2

[Mike Hommey [:glandium]]

about:support is toolkit.

Comment 3

[Sam Foster [:sfoster] (he/him)]

:gcp, can you triage this one?

Comment 4

[Yannis Juglaret [:yannis]]

Releasing ownership because I haven't been able to focus on this one.

Comment 1 makes a good point though -- since page file size grows dynamically it might be harder than it seems to implement the bonus part from comment 0 (detecting bad page file configuration). For that part we may want to try to figure out how the page file is configured and print that directly (if that is possible), rather than try to detect a bad configuration based on numbers (though that may work as well, I'm not sure).