> Depending on your OS and Bind settings, Bind may be performing IPv6/AAAA > queries in parallel to IPv4/A queries. If IPv6 is disabled on your RHEL5 > server I suspect they may only be performing IPv4/A queries during > recursion. You might check if this is, at least in part, responsible for the > additional load. >
I just compiled a version of bind on the RHEL 6 system with ipv6 disabled and the results were the same. > > You didn't provide the same CPU information about your RHEL 5 builds as you > did for your RHEL6 system, so I just responded about the information you did > provide. Are these 24/32 core systems? Do the same number of named child > processes run on both the RHEL5 and RHEL6 systems? I'm going to assume that > you've already examined query load on the servers and found them similar. The other system only has 16 CPUs but named runs at a third of the CPU that the RHEL 6 box does. RHEL 5: version: 9.9.4-P1 () <id:07aaf1ef> CPUs found: 16 worker threads: 16 UDP listeners per interface: 16 number of zones: 169 debug level: 0 xfers running: 0 xfers deferred: 0 soa queries in progress: 0 query logging is ON recursive clients: 30/9900/10000 tcp clients: 0/100 server is up and running -- Daniel _______________________________________________ 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
