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From "Radim Kolar (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (CASSANDRA-3961) Make index_interval configurable per column family
Date Fri, 02 Nov 2012 01:40:12 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-3961?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Radim Kolar reassigned CASSANDRA-3961:
--------------------------------------

    Assignee: Radim Kolar
    
> Make index_interval configurable per column family
> --------------------------------------------------
>
>                 Key: CASSANDRA-3961
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3961
>             Project: Cassandra
>          Issue Type: Improvement
>    Affects Versions: 1.0.7
>         Environment: Cassandra 1.0.7/unix
>            Reporter: Radim Kolar
>            Assignee: Radim Kolar
>            Priority: Minor
>
> After various experiments with mixing OLTP a OLAP workload running on single cassandra
cluster i discovered that lot of memory is wasted on holding index samples for CF which are
rarely accessed or index is not much used for CF access because slices over keys are used.

> There is per column family setting for configuring bloom filters - bloom_filter_fp_chance.
Please add setting index_interval configurable per CF as well. If this setting is not set
or it is zero, default from cassandra.yaml will be used.

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