[jira] Updated: (CASSANDRA-75) wire up memtable mbean

["Eric Evans (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-75?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Evans updated CASSANDRA-75:
--------------------------------

    Attachment: 0002-an-MBean-attribute-for-displaying-a-flush-counter.patch

This changeset adds a new attribute to the ColumnFamilyStore MBean which displays the number of times the memtable has been "switched". This attribute (along with the newly added count and size attributes), should prove useful in tuning thresholds.

> wire up memtable mbean
> ----------------------
>
>                 Key: CASSANDRA-75
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-75
>             Project: Cassandra
>          Issue Type: Improvement
>    Affects Versions: trunk
>            Reporter: Eric Evans
>            Assignee: Eric Evans
>             Fix For: trunk
>
>         Attachments: 0001-add-instrumentation-for-memtable-attributes.patch, 0002-an-MBean-attribute-for-displaying-a-flush-counter.patch, 0003-jmx-resource-names-to-reflect-the-move-to-apache.patch
>
>
> It would be useful in the tuning of MemtableSizeInMB and MemtableObjectCountInMillions if the Memtable values for currentSize_ and currentObjectCount_ where exposed via JMX.

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