ZFS repeatable reboot 8.0-RC1

[jhell]

On Wed, 14 Oct 2009 18:55, grarpamp@ wrote:
> Happened again :) So some more notes...
>
> Watched it this time, it jumped from about 29xMiB straight to 366MiB,
> then hung and rebooted itself.
>
> The first zpool import after reboot takes about a minute more than
> the usual ten seconds to import. And uses up to maybe 125MiB instead
> of maybe 40MiB. Could be ZFS fscking itself? Second and further
> manual reboots are all normal speed and mem use.
>
> The fs is fine, I can do all sorts of normal ops on it. Even rm -r
> <that_dir>, ^C after a few seconds, and repeat ad nauseum until the
> tree is removed. Only continuous rm -r reboots.
>
> I have 1 more GiB RAM I can put in.
>
> Sorry to break threads, I'm not on list.
>

Your machine is starving! what you can do to improve upon performance of 
the pool is add a separate disk to the machine in which you can configure 
your ZIL(ZFS Intent Log) and a Cache. Those two things can improve greatly 
upon performance and reduce eating up so much ram that your system starts 
to starve itself. Add that other 1G of RAM if you have it just sitting 
around then put it to good use it will certainly help.

The disk that your doing your remove operation on ? is that being done on 
a ZFS GELI ?

PS: You can use thumb drives as caches and intent logs but beware I have 
had them stop and disappear in my system to only appear again on reboot.



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