[jira] [Assigned] (HBASE-15950) We are grossly overestimating the memstore size

["Enis Soztutar (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-15950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Enis Soztutar reassigned HBASE-15950:
-------------------------------------

    Assignee: Enis Soztutar

> We are grossly overestimating the memstore size
> -----------------------------------------------
>
>                 Key: HBASE-15950
>                 URL: https://issues.apache.org/jira/browse/HBASE-15950
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>             Fix For: 2.0.0
>
>         Attachments: Screen Shot 2016-06-02 at 8.48.27 PM.png
>
>
> While testing something else, I was loading a region with a lot of data. Writing 30M cells in 1M rows, with 1 byte values. 
> The memstore size turned out to be estimated as 4.5GB, while with the JFR profiling I can see that we are using 2.8GB for all the objects in the memstore (KV + KV byte[] + CSLM.Node + CSLM.Index). 
> This obviously means that there is room in the write cache that we are not effectively using. 



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)