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Re: [monit] Process without pidfile - cannot script

From: Martin Pala
Subject: Re: [monit] Process without pidfile - cannot script
Date: Thu, 11 Mar 2010 21:56:51 +0100


yes, monit requires pidfile ... you can still watch the parent process of smbd 
childs - the 'totalcpu' and 'totalmem' allows to react to total cpu and memory 
usage of all smbd's sub-processes, the 'children' statement allows to check 
sub-processes count.


check process smbd with pidfile /opt/samba/var/locks/
   start program = "/etc/init.d/smbd start"
   stop  program = "/etc/init.d/smbd stop"
   if failed host port 139 type TCP  then restart
   if totalcpu > 80% for 5 cycles then restart
   if totalmem > 500 MB then restart
   if children > 50 then restart


On Mar 11, 2010, at 4:35 AM, Adam Nielsen wrote:

> Hi all,
> Perhaps I'm not looking in the right spot but as far as I can tell Monit 
> requires a pidfile in order to monitor a process.
> I'm a bit stuck as to how to apply this to Samba.  I don't want to monitor 
> the main Samba process, but I do want to monitor each process that gets 
> spawned every time someone connects.  If there are 50 users connected to the 
> machine, there will be ~51 copies of smbd running, and they are created more 
> or less at random so there is no way to put them in a pidfile.
> After these sub-processes have exceeded a certain amount of memory I want to 
> kill them (the Windows machine will immediately reconnect so this isn't a 
> problem) but I'm not sure how to tell monit to check all the processes that 
> match the name "smbd".
> Any suggestions?
> Many thanks,
> Adam.
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