BIND 9.3.2 on FreeBSD 6.1 out of control
bert.hubert at netherlabs.nl
Mon Jan 8 09:23:40 UTC 2007
On Mon, Jan 08, 2007 at 11:02:05AM +1100, Mark Andrews wrote:
> 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.
I can tell from first hand experience that that works very well, much
PowerDNS doesn't go all the way, but simply shifts a cache entry to the back
of the 'to delete queue' whenever it is accessed.
http://www.PowerDNS.com Open source, database driven DNS Software
http://netherlabs.nl Open and Closed source services
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