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https://issues.apache.org/jira/browse/CASSANDRA-2142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-2142:
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Attachment: 2142.txt
adds StorageService.reduceHeapUsage, which flushes the largest memtables and
caps cache size when GCInspector notices that heap post-full-collection is
within a configurable threshold of completely full.
The threshold defaults to 100% if it is not specified in .yaml (i.e., off for
people upgrading) and 95% in the sample .yaml.
> 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.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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