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Date: Sat, 16 Oct 2010 08:51:25 -0400 (EDT)
From: "Hudson (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Subject: [jira] Commented: (CASSANDRA-1007) Make memtable flush thresholds
 per-CF instead of global
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    [ https://issues.apache.org/jira/browse/CASSANDRA-1007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12921682#action_12921682 ] 

Hudson commented on CASSANDRA-1007:
-----------------------------------

Integrated in Cassandra #567 (See [https://hudson.apache.org/hudson/job/Cassandra/567/])
    Make memtable flush thresholds per-CF instead of global.  Patch by Jon Hermes, reviewed by brandonwilliams for CASSANDRA-1007


> 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: Jon Hermes
>            Priority: Minor
>             Fix For: 0.7.0
>
>         Attachments: 1007-2.txt, 1007-3.txt, 1007.txt
>
>
> 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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