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Date: Sat, 20 Dec 2014 01:41:13 +0000 (UTC)
From: "Anoop Sam John (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12754711.1415782889000.74982.1419039673617@Atlassian.JIRA>
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Subject: [jira] [Updated] (HBASE-12463) MemstoreLAB reduce #objects created
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     [ https://issues.apache.org/jira/browse/HBASE-12463?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Anoop Sam John updated HBASE-12463:
-----------------------------------
    Resolution: Won't Fix
        Status: Resolved  (was: Patch Available)

ThreadLocal being bit costly I think no need to go with this now.

> MemstoreLAB reduce #objects created
> -----------------------------------
>
>                 Key: HBASE-12463
>                 URL: https://issues.apache.org/jira/browse/HBASE-12463
>             Project: HBase
>          Issue Type: Improvement
>          Components: Performance
>    Affects Versions: 0.99.0
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: HBASE-12463.patch
>
>
> By default Memstore uses MSLAB. For each of the Cell added to memstore, we will allocate area in MSLAB and return the area in BR wrapper. So each time a new BR object is created. Instead of this we can have ThreadLocal level BR instance and each time when allocate() API return the BR, we can set the byte[], offset, length on this ThreadLocal level BR instance. So totally only those many objects as the threads count (max handler count)


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