RE: Thread Usage of a specific process

If there's something you didn't understand, let me know.  There are lots
of things I don't understand about SNMP, and it's frustrating when I'm
offered superficial or confusing advice.  

I'm happy to share my limited, hard-won experience with you.

As an experiment, do the following:

- Make a backup copy of your snmpd.conf file.
- Write a script that will produce the thread count for some process.
- Insert the following line into your snmpd.conf file (the script
reference is just an example):

	exec .1.3.6.1.4.1.2021.250.1.1 threadCount
/usr/local/bin/threadCount.ksh

   You should replace "/usr/local/bin/threadCount.ksh"
- Restart the snmp agent on the system
- From your monitoring system, or any other system that can make an
snmpget poll to the system, issue the following command:

	snmpget -c public -v 2c myhost.me.com
.1.3.6.1.4.1.2021.250.1.1.101.1

  In the example above, you will need to check and/or replace the
community string "public", version "2c", and host "myhost.me.com".
Let's say the process you check has 8 threads.  If you issue the command
above, this is what you would get:

UCD-SNMP::ucdavis.250.1.1.101.1 = STRING: "8"

You can parse this output or add options to the snmpget command to get
less text.  For example, if you wanted to assign the number of threads
to a particular variable at the command line, the following would do it:

threadCount=`snmpget -c public -v 2c myhost.me.com
.1.3.6.1.4.1.2021.250.1.1.101.1 | awk '{printf("%s\n", $NF)}' | sed
's/"//g'`

So, if you echoed $threadCount, the command line would display 8.

Hope that helps.

Michael Peoples
Senior Systems Manager
AT&T - ATTSI
Office:   614-789-8559
Cell:      614-886-0923
FAX:     614-789-8975
[email protected]

-----Original Message-----
From: Jatin [mailto:[email protected]] 
Sent: Tuesday, March 30, 2010 11:47 AM
To: PEOPLES, MICHAEL P (ATTSI)
Cc: Jatin Davey; Dave Shield; [email protected]
Subject: Re: Thread Usage of a specific process

Thanks Micheal , Appreciate your help.

I would not say that i understood all the things that you have 
mentioned. I will work on the things that you have mentioned and will 
probably get back to the mailing list for more help. This reply 
certainly gives me the direction in which i have move forward to achieve

what i want.

Thanks
Jatin

PEOPLES, MICHAEL P (ATTSI) wrote:
> Jatin,
>
> Consider using the SNMP agent extensions.  These extensions, amongst
> other things, allow you reference the output of a script through a
> user-defined OID.  
>
> These extensions are placed in the snmpd.conf file.  For example:
>
> extend .1.3.6.1.4.1.2021.250.1.1 httpdThreadCount
> /usr/local/bin/countHttpdThreads.ksh
>
> Then you need to write a small script to output that number.  For
> Solaris, you might issue the following:
>
> ps -efL | grep automountd | tr -s ' ' | sed 's/^ //' | cut -d' ' -f4
>
> If there were multiple automountd processes, you would have to sum the
> results.  Alternately, if you have a specific PID, then you could
> replace the above with:
>
> ps -fL -p | tr -s ' ' | sed 's/^ //' | cut -d' ' -f4
>
> No matter which approach you take, your script should print out a
single
> number.  Any program receiving it will consider that output to be a
> string, versus an integer or gauge.
>
> To get the value from the above OID, you would issue the following
> (example):
>
> snmpget -c public -v 2c myhost.me.com .1.3.6.1.4.1.2021.250.1.1.101.1
>
> Be sure to restart the agent after making the change.  Also, I found
> that the "extend" directive doesn't work on the Net-SNMP agent shipped
> with Solaris 10 (agent version 5.0.9).  You can replace "extend" with
> "exec", although the latter is being deprecated.
>
> This method is an easy way to gain SNMP access to data not supported
in
> traditional MIB's.  The down side is that unless you can figure out a
> way to mimic the table structure of a compiled MIB, every process you
> wish to monitor will require a separate OID.  You can mitigate some of
> the work by creating a script that allows you to pass a parameter to
in
> on the command line.   Example:
>
> extend .1.3.6.1.4.1.2021.250.1.1 httpdThreadCount
> /usr/local/bin/countThreads.ksh httpd
> extend .1.3.6.1.4.1.2021.250.1.2 automountdThreadCount
> /usr/local/bin/countThreads.ksh automountd
> extend .1.3.6.1.4.1.2021.250.1.3 statdThreadCount
> /usr/local/bin/countThreads.ksh statd
>
> If you walk the OID (.1.3.6.1.4.1.2021.250.1), you'll get a feel for
how
> the agent handles extensions.
>
> Good luck.
>
> Michael Peoples
> Senior Systems Manager
> AT&T - ATTSI
> Office:   614-789-8559
> Cell:      614-886-0923
> FAX:     614-789-8975
> [email protected]
> -----Original Message-----
> From: Jatin Davey [mailto:[email protected]] 
> Sent: Tuesday, March 30, 2010 3:46 AM
> To: Dave Shield
> Cc: [email protected]
> Subject: Re: Thread Usage of a specific process
>
> Thanks Dave.
>
> Thanks
> Jatin
>
> On 3/30/2010 12:39 PM, Dave Shield wrote:
>   
>> On 30 March 2010 07:45, Jatin Davey<[email protected]>  wrote:
>>    
>>     
>>> Is there a MIB parameter that i can use to monitor the "threads
>>>       
> usage"
>   
>>> by a specific process.
>>>      
>>>       
>> No
>>
>> Dave
>>
>>    
>>     
>
>
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proactively, and fine-tune applications for parallel performance.
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