[cfarm-users] cfarm104 maintenance

[Tom Lane]

Stefan Ring via cfarm-users <cfarm-users at lists.tetaneutral.net> writes:
> somehow this system is dog slow when compiling C/C++. I’ve never been
> very good at reading Darwin’s diagnostic output, but it seems like
> there is a crazy amount of swapping going on, and the fseventsd
> process is hogging two thirds of the memory. Every process that wants
> to do something is in state "stuck", i.e., waiting for disk. The
> system reads and writes around 3 TB from/to disk every day. This is
> insane!

On my own Mac minis, fseventsd occasionally gets stuck in some kind of
loop and starts consuming ~100% of one core (per "top") as well as
plenty of I/O.  Rebooting fixes it, for awhile.  This seems to be less
probable on Apple Silicon hardware, or maybe just less probable on
newer OS versions, but I have seen it recently even on an M4 + Tahoe
machine.

> Maybe switching off Spotlight would make it better.

"sudo mdutil -a -i off" FTW.  It won't fix this fseventsd problem
though.

			regards, tom lane