Maintained by: NLnet Labs

[Unbound-users] Memory Usage

Paul Taylor
Thu Mar 22 03:35:09 CET 2012

Sorry, I think I was in a bit of a hurry when I wrote this and didn't
complete my thought.

I can't say what my settings are without digging into the config
file(I'm travelling at the moment), but I wouldn't generally expect
memory use to continuously increase.  The number of devices using this
DNS server isn't really changing and my cache timeout is only 10
minutes.  So, if the number of users (and presumably the number of
queries) aren't increasing, and the cache timeout is so low that the
overall cache size shouldn't be continuously growing, why would the
memory usage keep going up?  

Anyone else out there monitoring their Unbound usage with Cacti?  How
does your memory usage look? 


-----Original Message-----
From: unbound-users-bounces at
[mailto:unbound-users-bounces at] On Behalf Of
lst_hoe02 at
Sent: Wednesday, March 21, 2012 6:05 PM
To: unbound-users at
Subject: Re: [Unbound-users] Memory Usage

Zitat von Paul Taylor <PaulTaylor at>:

> Hi,
>                 A few weeks ago, we put Unbound in as a caching
> DNS server and we started graphing stats in Cacti within the next
> of days.   Over the last two weeks, it appears that the memory usage
> creeping up for these metrics:
> Metric                                                   Min
> Max
> RRset cache memory                     6.9 M                     56.38
> Messages cache memory             6.0 M                     59.79 M
> Validator memory key cache      703.35 K               5.51 M
> All of these have moved up  little just about every day.


Sorry, i do not understand your question. What limits do you have in  
unbound.conf? Is it simply the fact that memory usage is raising you  
are worried about, or unbound not working within configured limits?



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