On Wed, Jun 5, 2024 at 19:49 (-0700), Mike Bird via tde-users wrote:
> On Wed June 5 2024 18:33:35 Jim via tde-users wrote:
>> Mike, how did you calculate how many files are opened by firefox? I just
>> added up all the entries in /proc/<pid>/fd for firefox and its children
>> processes and I "only" got 1881.
>> 2256004 seems like an astonishing number. Can you clarify this?
> Hi Jim,
> "lsof -n | grep firefox | wc -l" includes things like memory mapped libraries.
> "ps ax | grep firefox | wc -l" currently yields 78 firefox processes but
> "ps -eLf | grep firefox | wc -l" yields 2319 firefox threads.
> (This of course is nowhere near bulletproof but it'll do for now.)
> I probably have a couple hundred tabs open, across 23 firefox windows.
Thanks Mike.
I have three different firefox profiles running, and I'd guess over 100
tabs (more than I feel like counting right now).
For lsof -n | grep firefox | wc -l I get 882961 (which is a lot more
than I would have guessed before seeing your message, but not up in the
same range as you).
(Incidentally, I see that that the above grep catches lots of lines like
Socket 621 ... /usr/lib64/firefox/libsoftokn3.so
and I wonder whether the above grep double-counts some things. But maybe
that isn't a big deal anyway.)
FYI, on my system right now ps ax | grep firefox | wc -l gives 100,
and ps -eLf | grep firefox | wc -l gives 3105.
It is interesting (to me) that you have fewer threads, and yet about 2.55
times as many files opened.
For comparison, for a chromium instance with 22 tabs lsof reports 75422
files, and for 9 (collectively) urxvt terminals (with some perl extensions)
lsof reports 732 open files. Evidently the web browser programmers are
experts at writing software that uses lots of files. ;-)
Cheers.
Jim
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