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Posted to commits@cassandra.apache.org by "Chris Lohfink (JIRA)" <ji...@apache.org> on 2015/01/15 17:23:34 UTC

[jira] [Updated] (CASSANDRA-8627) Support Total/Recent latency histogram metrics for range slices

     [ https://issues.apache.org/jira/browse/CASSANDRA-8627?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Lohfink updated CASSANDRA-8627:
-------------------------------------
    Priority: Minor  (was: Major)

> Support Total/Recent latency histogram metrics for range slices
> ---------------------------------------------------------------
>
>                 Key: CASSANDRA-8627
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8627
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Chris Lohfink
>            Priority: Minor
>              Labels: metrics
>
> The Metrics histogram is pretty bad at non-normal data like latencies and (empirically tested and theoretically) is untrustworthy at 99th percentile. For applications that care about the percentiles having the more statistically accurate version is beneficial.  Adding the deprecated methods like other latency histograms for CASSANDRA-7338 temporarily would help.
> This is just for 2.1 branch. CASSANDRA-5657 solves everything in 3.0.



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