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From "Donald Smith (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8433) Add jmx and nodetool controls to reset lifetime metrics to zero
Date Sat, 06 Dec 2014 00:28:12 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8433?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Donald Smith updated CASSANDRA-8433:
------------------------------------
    Summary: Add jmx and nodetool controls to reset lifetime metrics to zero  (was: Add jmx
and mdoetool controls to reset lifetime metrics to zero)

> Add jmx and nodetool controls to reset lifetime metrics to zero
> ---------------------------------------------------------------
>
>                 Key: CASSANDRA-8433
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8433
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Donald Smith
>            Priority: Minor
>
> Often I change some parameter in cassandra, in the OS, or in an external component and
want to see the effect on cassandra performance.  Because some the jmx metrics are for the
lifetime of the process, it's hard to see the effect of changes.  It's inconvenient to restart
all the nodes. And if you restart only some nodes (as I often do) then only those metrics
reset to zero.
> The jmx interface should provide a way to reset all lifetime metrics to zero.  And *nodetool*
should invoke that to allow resetting metrics from the command line.



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