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From "Vijay (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-4315) Use EntryWeigher instead of Weigher to Measuring the cache.
Date Thu, 07 Jun 2012 04:32:23 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13290787#comment-13290787
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Vijay edited comment on CASSANDRA-4315 at 6/7/12 4:31 AM:
----------------------------------------------------------

We also might want to use MemoryMeter for KeyCache.put() too, with Promoted index in 1.2...
KeyCache no longer honers AVERAGE_KEY_CACHE_ROW_SIZE of 48 bytes.
                
      was (Author: vijay2win@yahoo.com):
    We also might want to use MemoryMeter for KeyCache.put() too, with Promoted index in the
mix KeyCache no longer honers AVERAGE_KEY_CACHE_ROW_SIZE of 48 bytes.
                  
> Use EntryWeigher instead of Weigher to Measuring the cache.
> -----------------------------------------------------------
>
>                 Key: CASSANDRA-4315
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4315
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.2
>            Reporter: Vijay
>            Assignee: Vijay
>             Fix For: 1.2
>
>
> This ticket is a followup for CASSANDRA-4150.
> CLHM 1.3 added EntryWeigher which will help us accurately measure the size of the 
> It might be useful to add Key capacity (In-Heap Overhead) vs off-heap capacity for serializing
cache (To avoid OOM's for a long Row Keys).

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