One issue that *may* be impacting you (and another reason to upgrade) is the size of the receive buffer within named was bumped up in 9.5 or 9.6 IIRC.
-- Jack Tavares ________________________________________ From: bind-users-bounces+j.tavares=f5....@lists.isc.org [bind-users-bounces+j.tavares=f5....@lists.isc.org] on behalf of Florian Weimer [f...@deneb.enyo.de] Sent: Sunday, November 11, 2012 13:46 To: Ed LaFrance Cc: bind-users@lists.isc.org Subject: Re: Need to improve named performance * Ed LaFrance: > Running BIND 9.3.6-P1-RedHat-9.3.6-16.P1.el5 on a quadcore xeon server > (3Ghz) with 2GB RAM. Named is being used only for rDNS queries against > our address space. You should really upgrade to the latest version on that branch (likely bind-9.3.6-20.P1.el5_8.5). > The bottom line is: I need to improve named performance. Tcpdump only > shows about 20 requests per second on average, I would estimate. This > should be handled easily, but instead it's gagging on it and the > requests are stacking up. Something is stalling the named process. Try to run "strace -T -f -p 4509" (4509 is the PID for the named process) and see where named spends its time. The top output you quoted suggests that the process is not spinning in user space. _______________________________________________ Please visit 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 _______________________________________________ Please visit 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