Performance grapher - No data on disk usage

crystal.then · Post by **crystal.then** » Wed Jan 13, 2021 5:46 pm

Hi,

We have a problem where performance grapher isn't showing any graphs for disk usage. It's fine for CPU and Memory, but disk it's blank.
Any ideas on what the problem might be, and the solution to fix the issue?

Thanks in advance.

benjaminsmith · Post by **benjaminsmith** » Thu Jan 14, 2021 4:10 pm

HI @crystal.then

The first thing to check would be to make sure the plugin is returning performance data as this optional.

perf-data.png

If you go to Home > Details > Services then find the disk check, and click on it. Then select the Advance Tab (+), and check the Performance Data field for incoming data.

If that's being returned, then try increasing the timeouts and load thresholds for your performance graphs as directed in the article below.

Nagios XI - Performance graph Problems

And let me know if the issue is resolved.

crystal.then · Post by **crystal.then** » Thu Jan 14, 2021 9:36 pm

Hi,

Performance data is being collected. We've already increased the timeouts etc.. as per the document you sent. Still not working.

ssax · Post by **ssax** » Fri Jan 15, 2021 3:47 pm

Please attach (or PM) the XML and RRD file of one of these failing disk usage checks from this directory:
- Change HOSTNAME to the hostname on the filesystem

Code: Select all

/usr/local/nagios/share/perfdata/HOSTNAME/

Please PM me a copy of your profile.zip as well, you can download it from Admin > System Profile by clicking the Download Profile button.

crystal.then · Post by **crystal.then** » Mon Jan 18, 2021 6:38 pm

Packages have been sent via PM.

ssax · Post by **ssax** » Tue Jan 19, 2021 6:19 pm

From the XML file:

Code: Select all

  <RRD>
    <RC>1</RC>
    <TXT>/usr/local/nagios/share/perfdata/XXXXX/C__Drive_Usage.rrd: found extra data on update argument: 63898120192</TXT>
  </RRD>

That means when the RRD was originally created it had a certain number of metrics, then either the plugin or the number of metrics changed, and so it's failing to insert the new data into the RRD files. RRDs require you insert the same number of metrics from RRD creation, if that number changes the data will fail to insert into the rrd and your graphs won't update.

You'll likely need to do this (ignore the title, this bulk adds datasources to the ones that are failing automatically):

https://support.nagios.com/kb/article/n ... g-149.html

Once that's done, wait 15 minutes and validate, let me know if it doesn't resolve the issue.

You could technically just delete the RRD file from /usr/local/nagios/share/perfdata/HOSTNAME for the services and while you would lose historical data for the graphs it would rebuild the RRD file with the proper number of metrics on the next check and start graphing properly after a few checks have come in.

crystal.then · Post by **crystal.then** » Wed Jan 20, 2021 11:22 pm

Thanks, that appears to have resolved the issue.

scottwilkerson · Post by **scottwilkerson** » Thu Jan 21, 2021 8:50 am

crystal.then wrote:Thanks, that appears to have resolved the issue.

Great!

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Performance grapher - No data on disk usage

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