Linux bind / dhcp iowait status
tgreaser at hsc.wvu.edu
Wed Mar 15 19:37:46 UTC 2006
sorry i dont have the sar data avaliable
to go that far back from where i had the
phones also running dhcp leases every 4 hours..
but im thinking that didnt seem to make to much of a diff..
im going to break the mirror tonight and
see if is a hardware issue..
Thanks again for the echos..
>>>dhcp at thehobsons.co.uk 03/15/06 12:06 pm >>>
Tom Greaser wrote:
>have a beefy box that shows 18.40 % iowait at PEAK times
>and as low as 5.50 % during work hours..
>have 2000 phones lease set to 1 day
>2000 pc lease set to 4 hours..
>running ddns on this host ...
>just wanting to see if this is "normal"
>will track down to see if its named or dhcpd doing the bulk of IO
>Its an Redhat AS 4 update 3 box with mirrored scsi Ultra 320 drives
>from free -h
>buffer 137meg cache 1627 meg
That sounds exceedingly high IF the box is only doing DHCP and DNS.
In fact I'd consider 5.5% to be exceedingly high for such a box.
What else is running on the box ?
Does it make any difference if you increase lease times as Glenn
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