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From "Dave Brosius (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-5538) Reduce Empty Map allocations in StorageProxy.sendToHintedEndpoints
Date Mon, 06 May 2013 06:26:16 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-5538?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dave Brosius updated CASSANDRA-5538:
------------------------------------

    Attachment: 5538.txt
    
> Reduce Empty Map allocations in StorageProxy.sendToHintedEndpoints
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-5538
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5538
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 2.0
>            Reporter: Dave Brosius
>            Assignee: Dave Brosius
>            Priority: Trivial
>             Fix For: 2.0
>
>         Attachments: 5538.txt
>
>
> StorageProxy.sendToHintedEndpoints allocates HashMaps consistently that are very often
not used.
> See output: http://pastebin.com/jEaBxz1h
> 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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