absurd I/O perf with ZFS: hangs on zfs->cv)

[Adam Vande More]

On Tue, Jan 15, 2013 at 10:57 PM, Eitan Adler <lists at eitanadler.com> wrote:

> Hi all.
>
>
> Running FreeBSD 9.1-Release, I am seeing some absurd hangs (10 minutes
> or more to open a file) with SIGINFO informing me that the process is
> stuck on zio->io_cv.
>
> Does anyone have any suggestions for what I want to look at to tune
> this?
>

https://wiki.freebsd.org/ZFSTuningGuide  Even has a section on laptop
settings.  Also the ZFS Evil Tuning Guide



-- 
Adam Vande More