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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-11939) Read and Write Latency columns are swapped in proxyhistograms vs cfhistograms
Date Fri, 03 Jun 2016 15:39:59 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-11939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sylvain Lebresne updated CASSANDRA-11939:
-----------------------------------------
    Labels: lhf  (was: )

> Read and Write Latency columns are swapped in proxyhistograms vs cfhistograms
> -----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-11939
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11939
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Tools
>            Reporter: J.B. Langston
>            Priority: Minor
>              Labels: lhf
>
> It’s triggering my ocd that read and write latency columns are swapped in proxyhistograms
vs cfhistograms. I guess the argument against changing it now is that it could screw with
some peoples scripts or expectations, but it does make it hard to eyeball when you’re trying
to compare local latencies vs coordinator latencies.
> {code}
> Percentile  SSTables     Write Latency      Read Latency    Partition Size        Cell
Count
>                               (micros)          (micros)           (bytes)
> 50%             4.00             17.00            770.00              8239          
      4
> 75%             5.00             24.00            924.00             17084          
     17
> 95%             5.00             35.00          61214.00             51012          
     24
> 98%             6.00             35.00         126934.00            105778          
     24
> 99%             6.00             72.00         152321.00            152321          
     35
> Min             0.00              9.00             36.00                21          
      0
> Max             6.00             86.00         263210.00          20924300          
   1109
> Percentile      Read Latency     Write Latency     Range Latency
>                     (micros)          (micros)          (micros)
> 50%                  1331.00            535.00          11864.00
> 75%                 17084.00            642.00          20501.00
> 95%                219342.00           1331.00          20501.00
> 98%                315852.00           2759.00          20501.00
> 99%                379022.00           3311.00          20501.00
> Min                   373.00             73.00           9888.00
> Max                379022.00           9887.00          20501.00
> {code}
> Ideally read and write latencies should be in the same order and the first and second
columns on both so they’re directly aligned.  The sstables column should be moved to the
3rd column to make way.



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