I have a FreeBSD 11.3-STABLE server that is my router, using a ZFS mirror (of
two GPT disks) as it’s disk. It’s many years old, and has only been
misbehaving like this for a day or so. I’m trying to figure out what’s wrong.
I confirmed that internet connectivity isn’t the problem, and a reboot didn’t
fix it. (The reboot took 10-15 minutes to finish going multi-user, starting
daemons, due to the underlying problem described below.)
Truss’ing a very basic command (date), I can see that close() and exit() calls
are taking 1-2 seconds. All of the files being opened are on ZFS, but I don’t
know if that’s for sure related. Similarly, using shell builtin “echo foo”
always is immediate, but “/bin/echo” sometimes works quickly, but sometimes the
close() on /var/run/ld-elf.so.hints takes 3-5 seconds.
I _think_ this is a filesystem problem. It’s very hard to diagnose because
logging in, and doing anything, takes many seconds per command. zpool status
shows my mirror as online, so I’m not sure where I should check.
I’d appreciate any help! Thanks much…
- Chris
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