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<p class="MsoNormal"><span lang="EN-US">On Mon, 8 Mar 2021 at 19:21, Carl Melgaard <</span><a href="mailto:Carl.Melgaard@stab.rm.dk"><span lang="EN-US">Carl.Melgaard@stab.rm.dk</span></a><span lang="EN-US">> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:black">></span><span lang="EN-US">One last thing to look at.
</span>Are the gaps actual missing data points, or are they values of zero? <span lang="EN-US">
The way to tell this is to dump the RRD file's contents using something like "rrdtool fetch netstat.rrd AVERAGE | tail -100" (or "less rather than tail -100) and look for either zero or low numbers,
<span style="color:black">></span>or NaN (not a number) entries. </span>[Note that the last few are usually NaN because they're still waiting for updates, so you can ignore those.]<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Currently I cant actually find a graph with a gap in it. I just noticed because it happened
on the Xymon server itself. On my old setup, it never happened.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:black">></span><span lang="EN-US">OK. I think your best bet to diagnose is going to be correlating log messages or other events to the gaps.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:black">></span><span lang="EN-US">You mentioned an "old setup".
</span>Can you describe what has changed from old to new setup? Have you upgraded hardware/OS/Xymon server/Xymon client(s)?<o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">I changed OS, CentOS 5.11 -> RH 7.9 and Xymon from 4.3.7 to 4.3.30, and changed from selfcompiled to Terabithia-packages. So quite a big jump.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Yes, client and server both runs on the same host. As did it on the old system. I want he Xymon server itself monitored. I have 2 Xymon servers, 1
primary and 1 secondary. The primary distributes to the secondary. Only the secondary is updated as of yet.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:black">></span><span lang="EN-US">You said that you noticed on the Xymon server itself. Has it only happened to graphs
</span>for the Xymon server? I'm wondering if you have the Xymon client AND the Xymon server both running on the same host?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">After I noticed it on the Xymon server itself, I went looked for gaps elsewhere, and I found some on other servers as well.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Also in xymonclient.log I get these quite alot, dunno if its related:</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">mv: cannot stat '/dev/shm/logfetch.x.cfg.tmp': No such file or directory</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">cat: /dev/shm/xymon_vmstat.x: No such file or directory</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">cat: /dev/shm/xymon_vmstat.x: No such file or directory</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="color:black">></span><span lang="EN-US">Can you explain "quite alot"?
</span>Can you give an indication of how often these occur?<o:p></o:p></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">623 lines in the logfile yesterday.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Carl<o:p></o:p></span></p>
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