selecttest tool

[Walter Gould]

JINMEI Tatuya / ???? wrote:
> At Fri, 08 Aug 2008 14:24:31 -0500,
> Walter Gould <gouldwp at auburn.edu> wrote:
>
>   
>>> I guess we need more information to diagnose:
>>>
>>> - your detailed configuration (named.conf)
>>>   
>>>       
>> Jinmei,
>>
>> See our attached named.conf file.
>>     
>
> I have a couple of suggestions:
>
> 1. you should specify a larger max-cache-size in named.conf.  the
>    default size of 9.5.0 (32MB) is normally too conservative for a
>    busy server with many clients, reducing cache hit rate and making
>    the server busier, and possibly triggering subsequent performance
>    troubles as a result.
> 2. #1 may be sufficient for you, but you may also want to raise
>    recursive-clients (whose default is 1000) to some reasonable large
>    value (e.g., 10000).  I suspect the primary reason for the SERVFAIL
>    in your case is that the server hits the recursive-clients quota.
>    I suspect the server left warning messages like ""no more recursive
>    clients: ...".  Raising recursive-clients will at least solve this
>    issue.
>
> ---
> JINMEI, Tatuya
> Internet Systems Consortium, Inc.
>
>   

So, why would we have not had these same issues arise six months or a 
year ago? Do you think it is related to upgrading to these newer BIND 
versions or possibly just a timing coincidence?

Thanks again,
Walter