[smokeping-users] Curl Graphs blank?

Pete Hoffswell Pete.Hoffswell at davenport.edu
Wed Sep 12 18:10:56 CEST 2007

Hi Peter and list - 

My log says:

Sep 12 10:29:50 networker3 smokeping[23449]: Curl: WARNING: smokeping took 430 seconds to complete 1 round of polling. It should complete polling in  300 seconds. You may have unresponsive devices in your setup. 

How about that!  You called it right, Peter.

I see that

Sep 12 10:19:13 networker3 smokeping[23449]: Curl: probing 21 targets with step 300 s and offset 160 s.

I do not have offset configured for curl, and expect it must be doing a random offset.  I will configure the offset for 0% to get them started right away.  I've also lowered the curl timeout to 5 seconds.

I would like to stay in the 300 second step if possible.

Any other suggestions?  I have 95 rrd files in my smokeping directory tree.  It's not huge....

Thanks for the quick response.  

Pete Hoffswell                 616-732-1101 (x1101)
Network Manager                616-510-1198 (Mobile)
IT Services                    pete.hoffswell at davenport.edu
Davenport University           http://www.davenport.edu

>>> <smokeping-users-bounces at lists.oetiker.ch> 9/12/2007 11:50 AM >>>
Hi Pete;

When an RRD graph is blank, it means null/no data (meaning no data at 
all was entered, like a NULL in a database, rather than a zero). With 
SmokePing, typically this would occur if the daemon was turned off 
during that time period, or e.g. if the probe crashed.  One other 
possible cause would be if SmokePing is not able to complete all probes 
within the allotted cycle time (e.g. if it takes 330 seconds to run all 
of the probes, but you are on a 300 second scan cycle, then some hosts 
will get missed).  Check your SmokePing log files to see what's going on 
-- it will warn you if cycles are overlapping.

The other thing to do is correlate the information against something 
else.  For example, if you're monitoring servers and there is a blank 
spot in SmokePing, did the server actually go down during that time?  
Are there helpdesk tickets for that system in that timeframe?   If the 
server WAS down but the SmokePing graphs are blank, it could be a bug in 
the Curl probe.  If the servers were up at those times, it's more likely 
the problem described in my first paragraph.

- Peter

Pete Hoffswell wrote:
> Good day!
> I have been encountering blank sections within trending charts on some 
> CURL probes.  I would have expected them to go red, if there was no 
> response.
> What does this mean? I cannot find in the documentation or searching 
> the list.
> I've posted a representative graph here:
> http://www.flickr.com/photos/petehoffswell/1366734130/ 
> Anyone know why this happens? 
> Pete Hoffswell                 616-732-1101 (x1101)
> Network Manager                616-510-1198 (Mobile)
> IT Services                    pete.hoffswell at davenport.edu 
> <mailto:pete.hoffswell at davenport.edu>
> Davenport University           http://www.davenport.edu 
> <http://www.davenport.edu/>
> http://www.youtube.com/watch?v=jyV_zLKth3I 
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