BIND 9.3.2 on FreeBSD 6.1 out of control

Mark Andrews Mark_Andrews at
Mon Jan 8 00:02:05 UTC 2007

> So is no one else experiencing this sudden surge in CPU usage when
> BIND 9 hits its max cache size?

	When the cache hits it's max size it trigger's a cleaning
	pass which randomly removes 25% of the RRset's in the cache
	as well as cleaning those that have expired.  That will
	take some cpu usage.
	At some point it would be nice to make the overmemory removal
	be LRU based rather than random.


> On 1/3/07, patrick <gibblertron at> wrote:
> > But when it reaches that limit, is there any reason why the named
> > process starts eating up all CPU time? The memory size, I can handle
> > (and control) -- it's the unexplained CPU usage that concerns me.
> >
> > This server is a master for 143 domains, and will likely take on many
> > more. Is there a way I can see what's in the cache? I'd just like to
> > get an idea of how much memory each record takes up so I can do some
> > math for future planning on resource requirements.
> >
> > Patrick
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at

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