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From "Benjamin Lerer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8603) Cut tombstone memory footprint in half for cql deletes
Date Mon, 07 Dec 2015 14:52:11 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benjamin Lerer updated CASSANDRA-8603:
--------------------------------------
    Component/s: Local Write-Read Paths

> Cut tombstone memory footprint in half for cql deletes
> ------------------------------------------------------
>
>                 Key: CASSANDRA-8603
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8603
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Local Write-Read Paths
>            Reporter: Dominic Letz
>            Assignee: Benjamin Lerer
>              Labels: tombstone
>             Fix For: 2.1.6, 2.2.0 rc1
>
>         Attachments: 8603-2.1-V3.txt, cassandra-2.0.11-8603.txt, cassandra-2.1-8603.txt,
cassandra-2.1-8603_v2.txt, system.log
>
>
> As CQL does not yet support range deletes every delete from CQL results in a "Semi-RangeTombstone"
which actually has the same start and end values - but until today they are copies. Effectively
doubling the required heap memory to store the RangeTombstone.



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