Re: sysctl -a is slow

On 09/19/2010 09:28, David Xu wrote:
> just typed sysctl -a on keyboard, and found it is slow, sometimes
> it has been stuck for a few seconds, further studied,I found it is
> stucked at sysctl kern.geom:
> 
> %/usr/bin/time sysctl -a kern.geom
> kern.geom.collectstats: 1
> kern.geom.debugflags: 0
> kern.geom.label.debug: 0
> kern.geom.label.ext2fs.enable: 1
> kern.geom.label.iso9660.enable: 1
> kern.geom.label.msdosfs.enable: 1
> kern.geom.label.ntfs.enable: 1
> kern.geom.label.reiserfs.enable: 1
> kern.geom.label.ufs.enable: 1
> kern.geom.label.ufsid.enable: 1
> kern.geom.label.gptid.enable: 1
> kern.geom.label.gpt.enable: 1
>        2.01 real         0.00 user         0.00 sys
> 
> it seems it needs more than 2 seconds to complete.
> 

A ktrace(1) and a kdump(1) of the resulting ktrace.out file would
probably help here along with uname -a. Ive seen this happen once before
but do not recall what caused it.


Regards & good luck,

-- 

 jhell,v