max-ncache-ttl

[Kevin Darcy]

Forrest Aldrich wrote:

> Reading pg. 294 (Chapter 10) of the 4th edition BIND nutshell book, it
> explains how it might be prudent to set the max-ncache-ttl variable to
> something like 3600 (1hr).
>
> However, I wonder what the performance tradeoff might be, on a server that
> you want a rich cache buildup to be created (for maximizing internal use).
>
> We've only run into 2 incidents where we needed to stop/restart the server
> due to an older record being cached.   Would be nice if there were some
> other way to poke the DNS server to drop a record(?).

Perhaps you could formulate this as a BIND feature request, e.g. an "ndc
purgeentry" option or something like that...


- Kevin