Have a look at reducing -n to the number of physical cores (which might be 4 or 8) and then also have a look at -U (number of listening tasks per interface).
Multiple listeners defaults to -n (number of worker threads). It's worth trying some tuning experiments from n/2 to n-1. What works best seems to be implementation/OS-dependent. For info on the multiple listening tasks, see: https://kb.isc.org/article/AA-00629/0/Performance%3A-Multi-threaded-I-O.html Is it remotely possible that your named is using more CPU because it's now handling a higher query rate more effectively, therefore the LB is sending it more traffic than before? Cathy On 27/07/2014 22:35, Lily wrote: > Thanks Mark. > > Also, for the high CPU of 9.9.5 on our RHEL5 box, after changed the # of > worker threads to 4, which was 16 by default, the load goes back to > normal, while on another same server with 16 worker threads, the CPU > load is 3 times higher. > > While with BIND 9.8, the default 16 thread never cause any load problem. > > Thanks > Lily > > > > On Sat, Jul 26, 2014 at 8:59 PM, Mark Andrews <ma...@isc.org > <mailto:ma...@isc.org>> wrote: > > > BIND 9.8 goes eol in September. BIND 9.8.8 will/should be released > before then. BIND 9.8.8 will be the eight maintainence release for > BIND 9.8. > > After EOL we still look at bugs as they will most probably in later > releases but you will need to move to a newer feature set (9.9.x, > 9.10.x, 9.11.x) to get the fix. As time goes on it becomes "please > reproduce with a current release" > > Mark > -- > Mark Andrews, ISC > 1 Seymour St., Dundas Valley, NSW 2117, Australia > PHONE: +61 2 9871 4742 <tel:%2B61%202%209871%204742> > INTERNET: ma...@isc.org <mailto:ma...@isc.org> > > > > > _______________________________________________ > 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
