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Posted to commits@cassandra.apache.org by "Ariel Weisberg (JIRA)" <ji...@apache.org> on 2018/11/28 21:59:00 UTC
[jira] [Comment Edited] (CASSANDRA-11939) Read and Write Latency
columns are swapped in proxyhistograms vs cfhistograms
[ https://issues.apache.org/jira/browse/CASSANDRA-11939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16702416#comment-16702416 ]
Ariel Weisberg edited comment on CASSANDRA-11939 at 11/28/18 9:58 PM:
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Hey when you update patches can you delete the old ones? It's hard to tell which is the latest one.
was (Author: aweisberg):
Hey when you update patches can you delete the olds? It's hard to tell which is the latest one.
> 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
> Assignee: Amanda R Debrot
> Priority: Minor
> Labels: lhf
> Attachments: 11939-2.2.txt, 11939-2.2.txt, 11939-3.0.txt, 11939-3.0.txt, 11939-3.11.txt, 11939-3.11.txt, 11939-output.txt, 11939-trunk.txt, 11939-trunk.txt
>
>
> 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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