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From "Marcus Eriksson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12228) Write performance regression in 3.x vs 3.0
Date Wed, 03 Aug 2016 12:01:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15405797#comment-15405797
] 

Marcus Eriksson commented on CASSANDRA-12228:
---------------------------------------------

New default looks good, and it makes sense to remove memtable_cleanup_threshold - but I'm
not entirely sure we can/should do that in 3.x (def not in 3.9, maybe 3.10), should we make
it deprecated it and remove in 4.0 instead?

> Write performance regression in 3.x vs 3.0
> ------------------------------------------
>
>                 Key: CASSANDRA-12228
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12228
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: T Jake Luciani
>            Assignee: Ariel Weisberg
>            Priority: Minor
>             Fix For: 3.9
>
>
> I've been tracking down a performance issue in trunk vs cassandra-3.0 branch.
> I think I've found it.  CASSANDRA-6696 changed the default memtable flush default to
1 vs the min of 2 in cassandra-3.0.
> I don't see any technical reason for this and we should add back the min of 2 sstable
flushers per disk.



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