Performance Problem Postmortem

[David W. Hankins]

On Sat, Aug 15, 2009 at 06:19:14PM -0400, Robert Hille wrote:
> Aug  9 06:04:13 ns-dhcp-07 dhcpd: Unable to add forward map from [hostname] 
> to [IP]: timed out

DDNS timeouts pause the server for one second, so it couples your
performance to one DHCPREQUEST per second.  This is very likely the
source of your issues, I would suggest disabling ddns until the
issue can be fixed.

DISCOVER/OFFER may appear delayed, but this is the icmp-echorequest
feature ("ping-check"), and is performed asynchronously with handling
other DHCP packets.

-- 
David W. Hankins	"If you don't do it right the first time,
Software Engineer		     you'll just have to do it again."
Internet Systems Consortium, Inc.		-- Jack T. Hankins
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