Graphing in Xymon

I thing RRD needs two or more consecutive data points before it produces
results. If you add more than one within a timeslot, it rejects the second
and subsequent ones. If you've configured your RRD file to work on an
hourly basis, you need to wait 2-3 hours.

On Wed, 11 Sep 2019 at 02:07, Root, Paul T <user-76fdb6883669@xymon.invalid>
wrote:

A couple hours later, and still no graph in xymon.  Ssl_error_log yields:


[Tue Sep 10 11:01:36 2019] [error] [client 10.139.63.193] Premature end of
script headers: showgraph.sh, referer:
https://xymon.corp.intranet/xymon-cgi/svcstatus.sh?HOST=nsmdenvp185&SERVICE=ConfigPulls


The manual graph is still getting more data in, using the exact same
definitions as in graphs.cfg.


*From:* Root, Paul T
*Sent:* Tuesday, September 10, 2019 9:09 AM
*To:* 'Jeremy Laidman' <user-0608abae5e7c@xymon.invalid>
*Cc:* Japheth Cleaver <user-87556346d4af@xymon.invalid>; Ralph Mitchell <
user-00a5e44c48c0@xymon.invalid>; xymon at xymon.com
*Subject:* RE: [Xymon] Graphing in Xymon


Excellent, that?s probably the key.


I?ve made the change, I?m guessing I need a new input before anything can
work.


rrdtool tune ConfigPulls.rrd -h NetAtoD:86400 -h NetEtoN:86400 -h
NetOtoZ1to9:86400 -h Other:86400 -h InfraGen:86400 -h InfraSec:86400


<?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> 1568123701 </lastupdate> <!-- 2019-09-10 08:55:01
CDT -->


        <ds>

                <name> NetAtoD </name>

                <type> GAUGE </type>

                <minimal_heartbeat> 86400 </minimal_heartbeat>

                <min> NaN </min>

                <max> NaN </max>


                <!-- PDP Status -->

                <last_ds> 167 </last_ds>

                <value> NaN </value>

                <unknown_sec> 1 </unknown_sec>

       </ds>


Impatient as I am, I manually ran the script again, and then ran the
rrdtool graph, and I got data points on the graph. So I should be close
now.


Thanks,

Paul.


*From:* Jeremy Laidman <user-0608abae5e7c@xymon.invalid>
*Sent:* Tuesday, September 10, 2019 8:38 AM
*To:* Root, Paul T <user-76fdb6883669@xymon.invalid>
*Cc:* Japheth Cleaver <user-87556346d4af@xymon.invalid>; Ralph Mitchell <
user-00a5e44c48c0@xymon.invalid>; xymon at xymon.com
*Subject:* Re: [Xymon] Graphing in Xymon


"ds[NetAtoD].minimal_heartbeat = 600"


Isn't the minimal_heartbeat setting for telling RRD to discard samples
that exist on their own? I think the idea is that it doesn't make sense to
calculate values from DERIVE or COUNTER inputs. From the man page for
rrdcreate:


<*The "heartbeat" defines the maximum acceptable interval between
samples/updates. If the interval between samples is less than "heartbeat",
then an average rate is calculated and applied for that interval. If the
interval between samples is longer than "heartbeat", then that entire
interval is considered "unknown".*>


If you're sampling once per hour, then every sample will exceed the 600
second heartbeat. So you might need to re-create (or rrdtune) your RRD file
and increase the mimimal_heartbeat value.


And from the man page for rrdtune:


<*--heartbeat**|-h ds-name:heartbeat *

*modify the heartbeat of a data source. By setting this to a high value
the **RRD will accept things like one value per day.*>


J


This communication is the property of CenturyLink and may contain
confidential or privileged information. Unauthorized use of this
communication is strictly prohibited and may be unlawful. If you have
received this communication in error, please immediately notify the sender
by reply e-mail and destroy all copies of the communication and any
attachments.