[Xymon] rrddefinitons.cfg - how to modify the default step in RRA

Fri Feb 8 15:54:06 CET 2013

 From the rrddef.cfg comments:
# Each section key is the column- or data-name reported from your
# client test. Typically this is "cpu", "memory", "tcp", or some
# custom test you have created.

In your original script:
[ buda ext]# cat httpd_threads.sh
#!/bin/bash
THREADS_HTTP=`ps -ef | grep -c [h]ttpd`
*LINE="data $MACHINE.trends*
[httpd_threads.rrd]
DS:threads:GAUGE:5:U:U $THREADS_HTTP"
$BB $BBDISP "$LINE"

it appears that your  data name is "trends".  This is what xymon is 
trying to match in rrddef.cvf.  The key you should be using in rrddef.cfg.

[trends]
     -s 5
     RRA:AVERAGE:0.5:60:576
     RRA:AVERAGE:0.5:360:576
     RRA:AVERAGE:0.5:1440:576
     RRA:AVERAGE:0.5:17280:576

With that said, "trends" is already a column heading... I'm not sure 
that using it for your rrd key won't cause other problems in xymon.  
Maybe change it to "httpd_threads"?

If that doesn't work, try putting the -s in the default section "[]", 
and see if that works.  You shouldn't leave it there as it will set all 
future graphs to a 5 second step, but it works there, then you know your 
problem is with your data name and key.

Michael Beatty
Sherwin-Williams
IT Analyst/Developer
michael.beatty at sherwin.com
216-515-7374

On 02/08/2013 09:47 AM, Nico wrote:
> Hi
>
> i modified also the name but no change.
>
> [httpd_threads]
>         -s 5
>         RRA:AVERAGE:0.5:60:576
>         RRA:AVERAGE:0.5:360:576
>         RRA:AVERAGE:0.5:1440:576
>         RRA:AVERAGE:0.5:17280:576
>
> There is no column, the script is only posting RRD data.
>
>>>>>> [ buda ext]# cat httpd_threads.sh
>>>>>> #!/bin/bash
>>>>>> THREADS_HTTP=`ps -ef | grep -c [h]ttpd`
>>>>>> LINE="data $MACHINE.trends
>>>>>> [httpd_threads.rrd]
>>>>>> DS:threads:GAUGE:5:U:U $THREADS_HTTP"
>>>>>> $BB $BBDISP "$LINE"
>
>
> Is it the issue ?
>
> Cheers
> NIco
>
> Le 8 févr. 2013 à 15:22, Michael Beatty <Michael.Beatty at sherwin.com 
> <mailto:Michael.Beatty at sherwin.com>> a écrit :
>
>> in your rrdef.cfg file, Is your key correct?  Is the column you are 
>> reporting really [httpd_threads/15]?  This key is what it matches 
>> against your column.  If your key is [httpd_threads/15] but the 
>> column is "httpd_threads" (without the "/15"), then the rrd will be 
>> created with the default "[]" definition.
>>
>>
>> Michael Beatty
>> Sherwin-Williams
>> IT Analyst/Developer
>> michael.beatty at sherwin.com
>> 216-515-7374
>> On 02/08/2013 09:06 AM, Nico wrote:
>>> Hi,
>>>
>>> i tried "-s" trick and i also checked the man of rrdcreation which 
>>> made a reference of your suggestion:
>>>
>>>  --step|-s step (default: 300 seconds)
>>>        Specifies the base interval in seconds with which data will 
>>> be fed into the RRD.
>>>
>>>
>>> i tried to add both in rrddefinitions.cfg :
>>>
>>> [httpd_threads/15]
>>> --step 5
>>>         RRA:AVERAGE:0.5:60:576
>>>         RRA:AVERAGE:0.5:360:576
>>>         RRA:AVERAGE:0.5:1440:576
>>>         RRA:AVERAGE:0.5:17280:576
>>>
>>> or
>>>
>>>
>>> [httpd_threads/15]
>>> - s 5
>>>         RRA:AVERAGE:0.5:60:576
>>>         RRA:AVERAGE:0.5:360:576
>>>         RRA:AVERAGE:0.5:1440:576
>>>         RRA:AVERAGE:0.5:17280:576
>>>
>>> But it doesn't change anything, the RRD file is still created with 300.
>>>
>>> What s wrong ?
>>>
>>> Cheers
>>> Nico
>>>
>>> Le 8 févr. 2013 à 14:57, Nico <nicolas at lienard.name 
>>> <mailto:nicolas at lienard.name>> a écrit :
>>>
>>>> Hi
>>>>
>>>> Thanks for answer.
>>>>
>>>> I updated the rrddefinitons.cfg with your recommandations :
>>>>
>>>>
>>>> [httpd_threads/15]
>>>>         -s 5
>>>>         RRA:AVERAGE:0.5:60:576
>>>>         RRA:AVERAGE:0.5:360:576
>>>>         RRA:AVERAGE:0.5:1440:576
>>>>         RRA:AVERAGE:0.5:17280:576
>>>>
>>>> Then i restarted xymon server (it is needed ? in doubt i did it).
>>>>
>>>> I also deleted the previous RRD file to see how is created a fresh 
>>>> one after the modification:
>>>>
>>>> <?xml version="1.0" encoding="utf-8"?>
>>>> <!DOCTYPE rrd SYSTEM "http://oss.oetiker.ch/rrdtool/rrdtool.dtd">
>>>> <!-- Round Robin Database Dump -->
>>>> <rrd>
>>>> <version>0003</version>
>>>>         <step>*300*</step> <!-- Seconds -->
>>>> <lastupdate>1360331300</lastupdate> <!-- 2013-02-08 14:48:20 CET -->
>>>>
>>>>         <ds>
>>>>                 <name> threads </name>
>>>>                 <type> GAUGE </type>
>>>> <minimal_heartbeat>*5*</minimal_heartbeat>
>>>> <min>NaN</min>
>>>> <max>NaN</max>
>>>>
>>>>                 <!-- PDP Status -->
>>>> <last_ds>32</last_ds>
>>>> <value>3.1000000000e+03</value>
>>>>                 <unknown_sec> 105 </unknown_sec>
>>>>         </ds>
>>>>
>>>>
>>>> Unfortunately, it is still a step of 300.
>>>>
>>>> What did i miss ?
>>>>
>>>> Thanks again.
>>>>
>>>>
>>>> Cheers
>>>> Nico
>>>>
>>>>
>>>> Le 8 févr. 2013 à 14:19, Michael Beatty <Michael.Beatty at sherwin.com 
>>>> <mailto:Michael.Beatty at sherwin.com>> a écrit :
>>>>
>>>>> The 5 in your DS is your heartbeat, not step.
>>>>>
>>>>> Put a -s parameter in rrddefinitions.cfg  ie:
>>>>>
>>>>> [httpd_treads/5]
>>>>>     -s 5
>>>>> RRA:AVERAGE:0.5:60:576
>>>>>        RRA:AVERAGE:0.5:360:576
>>>>>        RRA:AVERAGE:0.5:1440:576
>>>>> RRA:AVERAGE:0.5:17280:576
>>>>>
>>>>>
>>>>> This will change your step to 5 seconds.  Note, that you will 
>>>>> probably want to change your heartbeat to a value greater than 
>>>>> your step.  By setting your heartbeat = step, you are running a 
>>>>> probable scenario of missing data. Your heartbeat should be 
>>>>> greater than your step, I'd recommend double, if not triple.
>>>>>
>>>>> Both step and heartbeat are set when the rrd file is created, you 
>>>>> cannot change them on the fly.  If you do not wish to lose 
>>>>> existing data, you will need to run "rrdtool tune -h threads:10" 
>>>>> to change your heartbeat.   Then, you will need to dump your rrd 
>>>>> to a file, edit the xml step with a text editor, then restore your 
>>>>> rrd from the edited xml,
>>>>>
>>>>> rrdtool dump httpd_threads.rrd > threads.xml
>>>>> edit the threads.xml setting step to 5
>>>>> rrdtool restore threads.xml httpd_threads.rrd
>>>>>
>>>>> If you plan on doing this on several hosts, or plan on doing it 
>>>>> frequently, I suggest you write a script and utilize the xymon 
>>>>> grep utility.... it will make your life considerably easier.
>>>>>
>>>>>
>>>>>
>>>>> Michael Beatty
>>>>> Sherwin-Williams
>>>>> IT Analyst/Developer
>>>>> michael.beatty at sherwin.com
>>>>> 216-515-7374
>>>>> On 02/07/2013 02:59 PM, Nico wrote:
>>>>>> Hi
>>>>>>
>>>>>> I need to do a temporarily graph with a very low frequency : 5 
>>>>>> seconds instead of the regular 300 seconds.
>>>>>>
>>>>>> 1/ On client side, the external script is simple:
>>>>>>
>>>>>> [ buda ext]# cat httpd_threads.sh
>>>>>> #!/bin/bash
>>>>>> THREADS_HTTP=`ps -ef | grep -c [h]ttpd`
>>>>>> LINE="data $MACHINE.trends
>>>>>> [httpd_threads.rrd]
>>>>>> DS:threads:GAUGE:5:U:U $THREADS_HTTP"
>>>>>> $BB $BBDISP "$LINE"
>>>>>>
>>>>>> So, as you can see, the step is 5 in the DS.
>>>>>>
>>>>>> clientlaunch.cfg has "INTERVAL 5s".
>>>>>>
>>>>>> 2/ On Xymon server side :
>>>>>>
>>>>>> rrddefinitions.cfg  :
>>>>>>
>>>>>> # step = 5 seconds
>>>>>> [httpd_threads/5]
>>>>>>         # 576 * 60 * 5 sec = 48 h soit 2 jours sans perte
>>>>>> RRA:AVERAGE:0.5:60:576
>>>>>> RRA:AVERAGE:0.5:360:576
>>>>>> RRA:AVERAGE:0.5:1440:576
>>>>>> RRA:AVERAGE:0.5:17280:576
>>>>>>
>>>>>>
>>>>>> # This one is the default setup. You can change it, if you like.
>>>>>> []
>>>>>>         # 576 datapoints w/ 5 minute interval = 48 hours @ 5 min avg.
>>>>>> RRA:AVERAGE:0.5:1:576
>>>>>>         # 576 datapoints w/ 6*5 minute averaged = 12 days @ 30 
>>>>>> min avg.
>>>>>> RRA:AVERAGE:0.5:6:576
>>>>>>         # 576 datapoints w/ 24*5 minute averaged = 48 days @ 2 
>>>>>> hour avg.
>>>>>> RRA:AVERAGE:0.5:24:576
>>>>>>         # 576 datapoints w/ 288*5 minute averaged = 576 days @ 1 
>>>>>> day avg.
>>>>>> RRA:AVERAGE:0.5:288:576
>>>>>>
>>>>>>
>>>>>>
>>>>>> 3/ RRD created:
>>>>>>
>>>>>> here the issue, the step is still 300. The minimal_heartbeat is 5.
>>>>>>
>>>>>> rrdtool dump httpd_threads.rrd
>>>>>>
>>>>>>
>>>>>> <?xml version="1.0" encoding="utf-8"?>
>>>>>> <!DOCTYPE rrd SYSTEM "http://oss.oetiker.ch/rrdtool/rrdtool.dtd">
>>>>>> <!-- Round Robin Database Dump -->
>>>>>> <rrd>
>>>>>> <version>0003</version>
>>>>>>         <step>*300*</step> <!-- Seconds -->
>>>>>> <lastupdate>1360264485</lastupdate> <!-- 2013-02-07 20:14:45 CET -->
>>>>>>
>>>>>>         <ds>
>>>>>>                 <name> threads </name>
>>>>>>                 <type> GAUGE </type>
>>>>>> <minimal_heartbeat>5</minimal_heartbeat
>>>>>>
>>>>>> --- snip ---
>>>>>>
>>>>>>
>>>>>> How can i change the step to 5 instead of 300 ?
>>>>>>
>>>>>> Thanks for your help.
>>>>>>
>>>>>>
>>>>>> Cheers
>>>>>> Nico
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>>> Xymon at xymon.com
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>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>> http://lists.xymon.com/mailman/listinfo/xymon
>>>>
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>>
>>
>

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