SERVFAIL and lame server errors for google MX servers

[Chris Thompson]

On Oct 20 2008, JINMEI Tatuya / 神明達哉 wrote:

>At Mon, 20 Oct 2008 11:35:44 +0100,
>"andys" <a.smith at ukgrid.net> wrote:
>
>>   I am seeing SERVFAIL errors from our FreeBSD BIND 9.5.0.2 server when 
>> looking up MX records for google.com.
>
>I guess you mean 9.5.0-P2, and if so, do you explicitly specify
>max-cache-size?  If not, that may be an implicit reason for the
>trouble.  The default max-cache-size of 9.5.0-P2 is 32MB, way too
>small for reasonably busy servers.  Depending on your available
>memory, I'd suggest specifying at least 256MB for a busy server.

Would having too small a cache really cause sporadic SERVFAILs?
I thought that 9.5.x's super new cache cleaning algorithms were
meant to prevent the long dead periods of previous versions.

>Aside from that, we're currently fixing a bug in cache entry
>management of 9.5.  This may also be related to your symptom, and if
>so, it will hopefully be fixed in the next beta (or RC) version of
>9.5.1.

Fix number? (so that we will recognise it in the CHANGES file in
due course!)

-- 
Chris Thompson
Email: cet1 at cam.ac.uk