On Tue, Apr 29, 2008 at 05:17:57PM -0700, Eugene Pefti wrote: > Can somebody explain me why the recursor cache size and latency are > correlated and directly proportional? > This is my dns graph. > http://ns2.w3media.net/recursor/ > Whenever the cache grows up to 30K entries the latency reaches as high as > 120 ms. See the second graph called "Questions/Answers latency in > milliseconds"
You have so little questions (10/second) that the statistics are not very good, and will be dominated by single queries that time out. > It when it reaches 120-130 ms it really affects recursor performance. If you see performance issues, please try http://svn.powerdns.com/snapshots/pdns-recursor-3.1.6-pre.tar.bz2 it contains an important fix for a timeout problem. Also, have you managed to look at the questions I sent you earlier? Bert -- http://www.PowerDNS.com Open source, database driven DNS Software http://netherlabs.nl Open and Closed source services _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
