Pawel Jakub Dawidek wrote:
On Sun, Sep 23, 2012 at 08:20:41PM -0400, Glen Barber wrote:
Hi Pawel,
[...]
Great! Thanks for this.
Any chance you can document the following sysctls?
None od the kstat sysctls are documented, they emulate kstat framework
from Solaris. We would need to modify a lot of vendor code to document
those in 'sysctl -d' output. It still would be good to have them
documented even elsewhere, eventhough most are rather self-explanatory.
There were some "sysctl documentation" project on the net (maybe som
GSoC, I am not sure). Most sysctl's are self-explanatory - unfortunately
only for knowledgeable developers or authors of the code.
And sometimes even a short description (sysctl -d) is not enough. It
explains meaning of some counter, but not the condition where / by what
this counter is triggered.
I think some public page on FreeBSD Wiki bould be good starting place
for documenting all useful sysctls, their meaning, tips for tuning, what
one can gain or lose by changing them etc.
root@kaos:/root # sysctl -d kstat.zfs.misc.zio_trim
kstat.zfs.misc.zio_trim:
kstat.zfs.misc.zio_trim.zio_trim_bytes:
kstat.zfs.misc.zio_trim.zio_trim_success:
kstat.zfs.misc.zio_trim.zio_trim_unsupported:
kstat.zfs.misc.zio_trim.zio_trim_failed:
Miroslav Lachman
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