Bug 964135 - pmchart fails to plot an archive
pmchart fails to plot an archive
Product: Fedora EPEL
Classification: Fedora
Component: pcp-gui (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Nathan Scott
Fedora Extras Quality Assurance
Depends On:
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Reported: 2013-05-17 06:49 EDT by Marko Myllynen
Modified: 2013-08-05 11:55 EDT (History)
3 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Clone Of:
Last Closed: 2013-08-04 22:12:35 EDT
Type: Bug
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Example archives (146.62 KB, application/x-bzip2)
2013-05-17 06:50 EDT, Marko Myllynen
no flags Details

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Description Marko Myllynen 2013-05-17 06:49:54 EDT
Description of problem:
I'll attach three different archives, one for incoming traffic, one for outgoing traffic, and one containing both, all generated from the same CSV data. Using pminfo/pmval shows no differences for the corresponding metrics.

Opening csv-data-lan-out with "pmchart -t 1m -a csv-data-lan-out" and plotting csv_data_lan_out.test.lan_outbytes_linux.eth0.txbyt_s works as expected but opening csv-data-lan-both with "pmchart -t 1m -a csv-data-lan-both" and plotting csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s produces an empty view.

Version-Release number of selected component (if applicable):
Comment 1 Marko Myllynen 2013-05-17 06:50:40 EDT
Created attachment 749294 [details]
Example archives
Comment 2 Nathan Scott 2013-07-26 01:03:33 EDT
| ... plotting csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s
| produces an empty view

It appears there is only a single value in the archive for this metric - is that expected?  It also has a timestamp that is for the final fetch group in the archive.

$ pmdumplog -z -a csv-data-lan-both | grep csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s
PMID: 245.0.12 (csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s)
23:59:00.000  245.0.12 (csv_data_lan_both.test.lan_outbytes_linux.eth0.txbyt_s): value 657803.87

pmchart is going to have a hard time working with a single data point.  Could this be a failure to import all the data you expected, Marko?  (and also, is it an archive that would be susceptible to the earlier log import issues around out-of-time-order records?)

Comment 3 Nathan Scott 2013-08-04 22:12:35 EDT
As per earlier comments, on closer inspection of the archive this appears to not be a bug.
Comment 4 Marko Myllynen 2013-08-05 11:55:32 EDT
Hi Nathan,

yes, agreed, all the evidence suggests that this was also collateral damage of bug 958745.


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