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From "Vijay (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-1969) Use BB for row cache - To Improve GC performance.
Date Tue, 11 Jan 2011 22:27:50 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-1969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vijay updated CASSANDRA-1969:
-----------------------------

    Description: 
Java BB.allocateDirect() will allocate native memory out of the JVM and will help reducing
the GC pressure in the JVM with a large Cache.
>From some of the basic tests it shows around 50% improvement than doing a normal Object
cache.

In addition this patch provide the users an option to choose BB.allocateDirect or store everything
in the heap.

  was:
Java BB.allocateDirect() will allocate memory out of the GC region and will help reducing
the GC pressure on the JVM. 
>From some of the basic tests it shows around 50% improvement than doing a normal Object
cache.

In addition we can provide the users an option to choose BB.allocateDirect or store everything
in the heap.


> Use BB for row cache - To Improve GC performance.
> -------------------------------------------------
>
>                 Key: CASSANDRA-1969
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1969
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>         Environment: Linux and Mac
>            Reporter: Vijay
>            Assignee: Vijay
>            Priority: Minor
>
> Java BB.allocateDirect() will allocate native memory out of the JVM and will help reducing
the GC pressure in the JVM with a large Cache.
> From some of the basic tests it shows around 50% improvement than doing a normal Object
cache.
> In addition this patch provide the users an option to choose BB.allocateDirect or store
everything in the heap.

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