On Tue, Apr 22, 2014 at 02:40:08PM -0700, Shawn Zhou wrote: > Our performance tests show that ISC BIND (authoritative only setup) > doesn't perform well on RHEL 6.4 in comparison with FreeBSD > 7:?bind_perf.png
You didn't specify which version of BIND, but I know that BIND 9.9 and higher, when running on Linux, is sensitive to the number of threads listening for incoming UDP connections. You can adjust this via the -U command line option: If you have 8 processors, I'd try it at -U 4, -U 5, -U 6 and -U 7 and see where the peak performance was found. Older linux kernels had a problematic UDP stack that caused a big performance drop relative to BSD or Solaris, essentially reducing it to single-thread performance. I believe all the major Linux distributions have switched to lockless UDP by now, but it might be worth checking out. -- Evan Hunt -- [email protected] Internet Systems Consortium, Inc. _______________________________________________ dns-operations mailing list [email protected] https://lists.dns-oarc.net/mailman/listinfo/dns-operations dns-jobs mailing list https://lists.dns-oarc.net/mailman/listinfo/dns-jobs
