"High" cpu usage when using ZFS cache device

Steven Hartland killing at multiplay.co.uk
Tue Oct 11 17:21:40 UTC 2011

----- Original Message ----- 
From: "Artem Belevich" <art at freebsd.org>

> No, there was no PR.
> L2arc CPU hogging after ~24 days was fixed in r218180 in -HEAD and was
> MFC'ed to 8-stable in r218429 early in February '11.

> If you're using 8-RELEASE, upgrading to 8-STABLE would be something to
> consider as there were other ZFS-related issues fixed there that
> didn't make it into -RELEASE.

Thanks for the confirmation there Artem, we currently can't use 8-STABLE
due to the serious routing issue, seem like every packet generates a
RTM_MISS routing packet to be sent, which causes high cpu load.

Thread: "Re: serious packet routing issue causing ntpd high load?"


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