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https://issues.apache.org/jira/browse/CASSANDRA-5537?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dave Brosius reassigned CASSANDRA-5537:
---------------------------------------
Assignee: Dave Brosius
> Reduce Empty Map allocations in Directory.SSTableLister
> -------------------------------------------------------
>
> Key: CASSANDRA-5537
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5537
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 2.0
> Reporter: Dave Brosius
> Assignee: Dave Brosius
> Priority: Trivial
> Fix For: 2.0
>
> Attachments: 5537.txt
>
>
> SSTableLister allocates HashMaps consistently that are very often not used.
> See output: http://pastebin.com/Ky4hUn5X
> Format is
> Type Date SourceLine CollectionSize NumBuckets NumBucketsUsed
> The snapshot is taken after the size of the collection hasn't changed for 5
> seconds.
> Postpone creation of hashmap until you need it.
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