Coincidentally yesterday ( 15, March ) at 1700 PST four of our name servers were knocked off-line with similar large CPU spikes and no corresponding spike in query requests.
We run Bind 9.9.2-P1 with RPZ feeds from Spamhaus and SURBL. We are still investigating some other potential sources of the problem, but I read your message this morning with great interest. On Sat, Mar 16, 2013 at 4:39 AM, Phil Mayers <p.may...@imperial.ac.uk>wrote: > All, > > In the last 12 hours, we've had repeated instances of named getting > wedged. The symptoms are: > > * named consuming nearly 100% CPU, all in user-time > * lots of queries apparently not processed, and based on query logging, a > sharp drop in the rate of queries that are > * a very sharp drop (almost a complete halt, in fact) in the rate of RPZ > "hits" in the logs at the exact time this happens > * no other interesting logs, as far as I can see > > Re-starting the named process clears it. > > I can't see anything in the release notes for 9.8.4/9.8.5 - any ideas? > > This is with the Spamhaus DBL, in case it matters. > > Cheers, > Phil > ______________________________**_________________ > Please visit > https://lists.isc.org/mailman/**listinfo/bind-users<https://lists.isc.org/mailman/listinfo/bind-users>to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/**listinfo/bind-users<https://lists.isc.org/mailman/listinfo/bind-users> > -- Augie Schwer - au...@schwer.us - http://schwer.us
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