named cause defunct processes

[Rabia Q.]

I turn on query logging and found out that other dns issues about 1000
queries per second to our dns and our dns is not able to contact it back
(maybe firewall or something)
I added it's IP to 'blackhole' option of named.conf and all started to
work fine

Thanks for the Help!


On Fri, 29 Sep 2000, Kevin Darcy wrote:

> 
> Defunct processes don't consume CPU, so I think the defunct processes are a
> *symptom* of your problem, rather than a cause. named is probably so busy
> that it's falling behind on wait()'ing for its child processes.
> 
> As for the root cause, I have no idea. Perhaps you should turn on query
> logging to see how much traffic you're actually getting. If it's a reasonable
> amount, turning on debugging might help you determine whether some unusual
> condition is causing "named" to consume an excessive amount of CPU. Is the
> machine swapping?
> 
> 
> - Kevin
> 
> Rabia Q. wrote:
> 
> > Hi,
> >
> > recently i have a problem with my dns that cause it to work very slow.
> > named daemon "eats" CPU "95.90% named" and when i check the processes
> > that are running i found out lot of defunct processes , i checked parent
> > process of the defunct process and it's the named process.
> >
> > ps auxw | grep defunct
> > root      4963  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      4982  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5005  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5020  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5035  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5040  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5042  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5043  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5044  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5045  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5046  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5048  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5050  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5053  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5055  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5070  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5077  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5079  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5083  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5103  0.0  0.0    0    0          Z           0:00  <defunct>
> > root      5157  0.0  0.0    0    0          Z           0:00  <defunct>
> >
> > I am running Solaris 2.8 32bit ,2GB RAM on sun E220 server, named 8.2.2-P5
> >
> > ps: i replaced the current server with other server that runs solaris 2.7
> >     same problem.
> >
> >  -rabia.
> 
> 
> 
> 
> 


---
Rabia Qusseiny
System Group
NetVision LTD.
Tel: 972-4-8560600  #585
Fax2Mail: 972-3-5480393