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From "Brandon Williams (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-2142) Add "reduce memory usage because I tuned things poorly" feature
Date Wed, 09 Feb 2011 18:44:57 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12992652#comment-12992652
] 

Brandon Williams commented on CASSANDRA-2142:
---------------------------------------------

reduce_cache_sizes_at probably needs to go to at least 0.85 to be useful, but works really
well when cache sizing is the problem.  +1

> Add "reduce memory usage because I tuned things poorly" feature
> ---------------------------------------------------------------
>
>                 Key: CASSANDRA-2142
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2142
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>              Labels: ponies
>             Fix For: 0.7.1
>
>         Attachments: 2142-v2.txt, 2142-v3.txt, 2142.txt
>
>
> Users frequently create too many columnfamilies, set the memtable thresholds too high
(or adjust throughput while ignoring operations), and/or set caching thresholds too high.
 Then their server OOMs and they tell their friends Cassandra sucks.

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