Bind 9.9.5 high CPU and when will Bind9.8 EOL?

[Cathy Almond]

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 <marka at isc.org
> <mailto:marka at 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: marka at isc.org <mailto:marka at isc.org>
> 
> 
> 
> 
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