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From "Todd Blose (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (CASSANDRA-1007) Make memtable flush thresholds per-CF instead of global
Date Fri, 30 Apr 2010 10:24:54 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-1007?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Blose reassigned CASSANDRA-1007:
-------------------------------------

    Assignee: Todd Blose

> Make memtable flush thresholds per-CF instead of global
> -------------------------------------------------------
>
>                 Key: CASSANDRA-1007
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1007
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jonathan Ellis
>            Assignee: Todd Blose
>            Priority: Minor
>             Fix For: 0.7
>
>
> This is particularly useful in the scenario where you have a few CFs with a high volume
of overwrite operations; increasing the memtable size/op count means that you can do the overwrite
in memory before it ever hits disk.  Once on disk compaction is much more work for the system.
> But, you don't want to give _all_ your CFs that high of a threshold because the memory
is better used elsewhere, and because it makes commitlog replay unnecessarily painful.

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