--On 7. oktober 2010 16.55.54 -0500 groups <gro...@obsd.us> wrote:
One party thinks that disabling query logging will give enormous performance gains, while 30% is a lot.. IMHO it is very negligible in CPU cycles when the named process only is taking up > 10% CPU.. and less than 10% in RAM... Just looking for any suggested tests..
I'm not an expert on this, so take whatever I say here with a grain of salt :D
You could run some dnsperf / resperf (<http://www.nominum.com/resources/measurement-tools>) ? Do some runs without query logging, then some with it enabled. Do the tests in the same way. A rather static way of doing it would be to run resperf against something you _know_ you have in your cache (like, looking up "localhost" or the reverse of 127.0.0.1 or whatever). Do it from the same server, or from another server in the same subnet, so you avoid network performance. resperf has a report tool which can easily make some nice graphs for you, showing when BIND starts to struggle with sending the replies, and another graph to tell you the latency / delay in replies. This should give you some numbers, to see how much query logging would impact you.
Regards Eivind Olsen _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
