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RE: [NV-L] Reporting NetView process threads with NetView ITM agent

To: "Tivoli NetView Discussions" <nv-l@lists.ca.ibm.com>
Subject: RE: [NV-L] Reporting NetView process threads with NetView ITM agent
From: "Paul Campbell" <Paul.Campbell@orb-data.com>
Date: Wed, 25 Apr 2007 11:23:50 +0100
Delivery-date: Wed, 25 Apr 2007 11:36:16 +0100
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Thread-topic: [NV-L] Reporting NetView process threads with NetView ITM agent
Jane, 

This is normal behaviour running a java application under Linux and has
nothing to do with Netview itself as per Sun's (SDN) comments below:

"Under Linux, threads are implemented using the clone() system call.
This creates a new process which can share memory space, file
descriptors and signal handlers.  This means each thread which Java
creates appears as a separate process which will show up in ps.  This is
normal." 

You should see one master pid and several child pids depending on the
no. of threads.

Cheers

-----Original Message-----
From: nv-l-bounces@lists.ca.ibm.com
[mailto:nv-l-bounces@lists.ca.ibm.com] On Behalf Of Jane Curry
Sent: 25 April 2007 10:50
To: NetView mailing list
Subject: [NV-L] Reporting NetView process threads with NetView ITM agent

NetView 7.1.5 on SuSE 9 Linux.
One of the out-of-the-box views that you get with the ITM NetView Agent,
shows the number of threads per process. 

I had always thought that some of the NetView processes are
multi-threaded - largely the Java based ones so, webserver, snmpserver,
servmon, maptreeserver.  If you do a ps -ef listing on a SLES 9 system
then you apparently get lots of processes showing for each of these
daemons, rather than several threads, whereas on an AIX system you tend
to see a single process.  Can anyone clarify this for me???

Going on from that, the ITM NetView agent is reflecting what I see in ps
- lots of processes for these daemons on a SLES 9 system.  I'd much
rather see a single process with several threads.  Any suggestions???

Many thanks,
Jane

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Copyright (c) 2007 Jane Curry <jane.curry@skills-1st.co.uk>.  All rights
reserved.

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