[Xymon] white gaps in graphs across a number of services

[Vincent Baines]

Thanks! will put those changes in now and see what it collects.

One other thing thats bugged me for a while, maybe related, I get some really random spurious RRD files generated, which when I look in the trends page for a specific host really make things messy. So, for example, in ./data/rrd/hostname1 for a specific service I'm monitoring called warehouse, I should have:
./warehouse,Memory.rrd
./warehouse,Threads.rrd

but as well as those I get all sorts of randomness:
warehouse,24590_24589_xymon_09.rrd
warehouse,4224_1_hostname2_20.rrd
warehouse,Kernel.rrd
murexnet,_FONT_SIZE.rrd
etc
In other words, appended other server names, PIDs, and other processes, and even xymon keywords.. 

They seem to get generated in clumps everynow and then, say a whole load of new ones at a specific time.

With the debug flags on I'll see if anything corresponds to a time when they're created.. but someone may have seen this one before maybe..?
________________________________________
From: cleaver at terabithia.org [cleaver at terabithia.org]
Sent: 18 June 2012 20:47
To: Vincent Baines
Cc: Xymon Email List
Subject: RE: [Xymon] white gaps in graphs across a number of services

No problem.. It can be confusing with long process chains like this :)

In tasks.cfg, in [xymond] put it straight after the xymond in the CMD
line. In [rrdstatus] and [rrddata], put it immediately after the
"xymond_rrd" (not xymond_channel).


-jc



> Sorry.. hopefully not a stupid question, but where should I put the
> --debug flag? I've done this before where I think I've enabled debug, but
> haven't and become happy because there were no debug errors!
>
> The logs are a bit messy at the moment, I'm trying to get rid of some of
> the errors, the main culprits are too many data sources for the RRD files,
> which I can't really explain as they work sometimes, and some cases of the
> message relating to 'expected message number XXX and received message
> number XXY' - sometimes just one or two but sometimes alot in one go.
> ________________________________________
> From: cleaver at terabithia.org [cleaver at terabithia.org]
> Sent: 18 June 2012 19:29
> To: Vincent Baines
> Cc: xymon at xymon.com
> Subject: Re: [Xymon] white gaps in graphs across a number of services
>
> Do you see anything unusual in the xymond_rrd or xymond log(s) around that
> time? If messages are dropping to zero, it could definitely be a crash
> somewhere.
>
> If nothing interesting shows up, try running both with --debug enabled as
> well... We might get a better idea of why that's happening.
>
> Regards,
>
> -jc
>
>
>> Hi Everyone,
>>
>>
>>
>> Have been looking on and off at a problem I've seen for a while now,
>> without massive success. I see intermittant 'white gaps' occuring in
>> xymon
>> results across a number of services, and sometimes at corresponding
>> times,
>> but sometimes not. Most frequently I see this gap for CPU load, and this
>> isn't just specific to one server.
>>
>> Attached is an example of useres and processes from one client server.
>> There is a corresponding gap for the approx 3AM gap in CPU utilization
>> graphs, memory graphs, actually, all of them I think, and a large
>> 300second spike in clock offset at that time. But, nothing corresponding
>> to the other gaps.
>>
>>
>>
>> If I look at the xymon server itself, it looks like there was something
>> up
>> at that time too, as xymond incoming messages drops to zero. But, for
>> the
>> rest of the day,  it holds at a steady number. But, theres are gaps all
>> over the place in xymonnet runtime, CPU utilization, users and procs,
>> etc.
>>
>>
>>
>> I seem to recall we did try to tweak some rrd cache value as it cropped
>> up
>> in another post, which I think improved things slightly. But, we are
>> having problems with the platforms that we're trying to monitor, with
>> apparent long NFS pings between boxes.
>>
>>
>>
>> The xymon server itself is running on a VM box. Has anyone had issues
>> running on VM?
>>
>>
>>
>> As best I can figure, either we have a xymon config issue, the xymon box
>> itself isn't stable and it dropping data, or we have genuine network /
>> disk write issues..
>>
>>
>>
>> Any other thoughts?
>>
>>
>>
>> Cheers!
>>
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