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[Evaggelos Balaskas <Evaggelos AT balaskas.gr>]

I guess a good strategy is to set something like 80% of your real mem.
Are you seeing any swapiness with max-cache-size 0 ?

you could also play with:

 max-cache-ttl seconds;
 max-ncache-ttl seconds;

to fine tune your settings.


Another solution is to change from bind to something else. I did it with
powerdns!


On 10/13/2015 08:26 PM, Julien Champenois wrote:
> Hey Opennic Community,
> 
> I have a quick question, since a day or two my named (bind9) process is
> maxing out my ram and thus DNS server stops answering (which is really
> annoying).
> 
> Before my config was the following: 
> 
> max-cache-size 0; // Default
> 
> 
> This was the default and it is unlimited, meaning that records are
> purged from the cache only when their TTLs expire. I guess that my
> server was receiving many queries from and the TTL wasn't reached before
> the process was actually reaching the max RAM I have. I've set this to
> 512M for testing.
> 
> So, I'm just wondering, what setting do you have? How much ram is your
> DNS server using (only the DNS process). Any advice on how to optimise
> the server?
> 
> 
> Thanks
> 
> Julien :)
> 
> 
> 
> 
> 
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