Help please: bind 9.3.0

[Guido Roeskens]

Hi,

Chris Stromsoe wrote:
> On Tue, 18 Jan 2005, Mark Andrews wrote:
> 
> 
>>	You have datasize (hard limit) and max-cache-size (soft limit)
>>	both set to 20M.  datasize is there to raise the default limit
>>	if it is too low.  max-cache-size is there to restrict the
>>	amount of memory used by the cache.
> 
> 
> I have a similar memory usage issue with 9.2.4.  I have max-cache-size set 
> to 250M.  After all the zones are loaded, bind uses approximately 500M. 
> datasize is not set.  I'm loading ~800 zones.  After a week of running, 
> bind swells to ~ 1.5G.  rndc dumpdb gives me a 58M file.
> 
> ~36 hours after starting, rndc dumpdb gives me a 58M dump file, and ps 
> shows:
> 
> cbs:~ > ps axu|egrep "^(USER|named)"
> USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
> named    11918  0.0 68.0 1070096 702688 ?    S    Jan17   0:00 /usr/local/bind-9.2.4/sbin/named -u named -n 2
> named    11919  0.0 68.0 1070096 702688 ?    S    Jan17   0:00 /usr/local/bind-9.2.4/sbin/named -u named -n 2
> named    11920  5.7 68.0 1070096 702688 ?    S    Jan17  91:46 /usr/local/bind-9.2.4/sbin/named -u named -n 2
> named    11921  5.7 68.0 1070096 702688 ?    S    Jan17  91:57 /usr/local/bind-9.2.4/sbin/named -u named -n 2
> named    11922  0.0 68.0 1070096 702688 ?    S    Jan17   0:11 /usr/local/bind-9.2.4/sbin/named -u named -n 2
> named    11923  0.8 68.0 1070096 702688 ?    S    Jan17  13:05 /usr/local/bind-9.2.4/sbin/named -u named -n 2
> 
ok, this is ~1GB
Bind with local zones uses 500M, plus 250M cache gives 750M

> 
> options {
>          version "x";
>          directory "/usr/local/etc/named";
> 
>          dump-file "/var/run/named/named_dump.db";
>          pid-file "/var/run/named/named.pid";
>          statistics-file "/var/run/named/named.stats";
> 
>          transfer-format many-answers;
>          max-cache-size 250M;
> };
> 
> 
> How "soft" a soft limit is max-cache-size?  Even allowing for other 
> allocations, growth 750M past the max-cache-size doesn't strike me as 
> right.  Is there anything that would prevent bind from expiring entries 
> from the cache even with max-cache-size set?  The system is running Linux, 
> Debian stable, kernel 2.4.  bind was compiled locally.  Any ideas where to 
> look?
> 
Do you use views?
max-cache-size is a limit per view.


Guido