On Wed, Apr 25, 2018 at 2:30 AM, Steve Wills <swi...@freebsd.org> wrote:
Hi,
Recently on multiple systems running CURRENT, I've been seeing the
system become unresponsive. Leaving top(1) running has lead me to
notice that when this happens, the system is still responding to ping
and top over ssh is still working, but no new processes can start and
switching to other tasks doesn't work. In top, I do see pid 17,
[zfskern{txg_thread_enter}] monopolizing both CPU usage and disk IO.
Any ideas how to troubleshoot this? It doesn't appear to be a
hardware issue.
Hi,
Do you have something writing to a gzip compressed dataset? You can use
the vfssnoop DTrace script from
https://forums.freebsd.org/threads/sharing-of-dtrace-scripts.32855/#post-181816
to see who's writing what.
I don't remember if it was exactly txg_thread_enter or whatever, but
both CPU and disk sounds a lot like heavily compressed writes.
In my case, the Epiphany browser was downloading a large malware
database to ~/.config/epiphany/gsb-threats.db :D
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