[nsd-users] nsd4 process weirdness?

[W.C.A. Wijngaards]

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Hi Tom,

On 03/11/2013 01:07 AM, Tom Hendrikx wrote:
> 
> Hi,
> 
> I was playing with the munin plugin in nsd4 beta4, and saw some
> strange errors. Directly after starting nsd on linux, I'm seeing:

The errors you see are caused by a shell script issue, compounded by
the ps output that does not work with the nsd_munin_ script.

The process that forked and seems detached from the parent is normal
after nsd reload processing.  But this caused the statistics problems.

In svn trunk I have updated nsd4 to have a new nsd-control command
serverpid that prints out the pid of the process with the interesting
RSS and VSZ.  That is used by the munin script (that I also updated)
to output the correct values.

Very intermittently this may fail and print 0 memory usage, but for
munin that should be good enough to get a graph about memory usage.

Would you like to try this updated version?

Best regards,
   Wouter

> $ ps ax -o pid,ppid,user,args | grep nsd 1638     1 nsd
> /usr/sbin/nsd -c /etc/nsd/nsd.conf 1641  1638 nsd
> /usr/sbin/nsd -c /etc/nsd/nsd.conf 1647  1641 nsd
> /usr/sbin/nsd -c /etc/nsd/nsd.conf
> 
> $ sudo munin-run nsd_munin_memory 
> /etc/munin/plugins/nsd_munin_memory: line 377: test: : integer 
> expression expected /etc/munin/plugins/nsd_munin_memory: line 383:
> test: expr: syntax error: integer expression expected 
> /etc/munin/plugins/nsd_munin_memory: line 389: test: : integer 
> expression expected /etc/munin/plugins/nsd_munin_memory: line 395:
> test: expr: syntax error: integer expression expected size_vsz 0 
> size_rss 0 size_db_mem.value 124776 size_xfrd_mem.value 12622376 
> size_config_mem.value 1928 size_db_disk.value 334848 
> size_config_disk.value 371
> 
> $ ps ax -o pid,ppid,user,args | grep nsd 1638     1 nsd
> /usr/sbin/nsd -c /etc/nsd/nsd.conf 2912     1 nsd
> /usr/sbin/nsd -c /etc/nsd/nsd.conf 2913  2912 nsd
> /usr/sbin/nsd -c /etc/nsd/nsd.conf
> 
> The munin errors are generated because the child process of pid
> 1638 (1641 in above output) went away, occurring while pulling vsz
> and rss numbers from ps output. That might a c/p error from the
> unbound plugin (unbound creates threads that all keep the same
> ppid).
> 
> But I'm mostly interested in nsd forking a new process (2912)
> detached from the parent...
> 
> Kind regards, Tom _______________________________________________ 
> nsd-users mailing list nsd-users at NLnetLabs.nl 
> http://open.nlnetlabs.nl/mailman/listinfo/nsd-users
> 

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