Memory leak cause of Comcast DNS problems

Mon Apr 18 06:14:06 UTC 2005

Hi,

On Apr 17, 2005, at 8:20 PM, Eric A. Hall wrote:
>> | The maximum amount of memory to use for the server's cache, in
>> | bytes. [...] The default is unlimited, meaning that records are
>> | purged from the cache only when their TTLs expire.
>
> That was my first guess too.
>
> Most DNS servers don't even have this switch.

Actually, I suspect most servers now do, at least in the context of 
Internet service provision.  I believe BINDv9 + dnscache + CNS (don't 
know about maradns, powerdns, or posadis but I believe their relative 
percentage isn't significant) outnumber BINDv4 and BINDv8.  Don't know 
if Microsoft DNS allows you to limit memory consumption, but I don't 
think it is used in an ISP context that frequently (although I might be 
wrong).

Rgds,
-drc