[jira] [Updated] (CASSANDRA-12300) Disallow unset memtable_cleanup_threshold when flush writers is set

["C. Scott Andreas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-12300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

C. Scott Andreas updated CASSANDRA-12300:
-----------------------------------------
    Component/s: Configuration

> Disallow unset memtable_cleanup_threshold when flush writers is set
> -------------------------------------------------------------------
>
>                 Key: CASSANDRA-12300
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12300
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Configuration
>            Reporter: Brandon Williams
>            Priority: Major
>
> Many times I see flush writers set, and mct unset, leading to a very small mct, which causes unneeded frequent flushing, and then of course compaction.  I also think the default is a bit conservative, typically ending up at 0.11, where I'd say the majority of use cases only have one or two hot tables and are much better served at 0.7 or 0.8.



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