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Posted to dev@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2015/04/11 02:49:14 UTC

[jira] [Resolved] (HBASE-4314) MemStoreFlusher lower bound should be allowed to be lower.

     [ https://issues.apache.org/jira/browse/HBASE-4314?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell resolved HBASE-4314.
-----------------------------------
    Resolution: Fixed

This was done recently elsewhere

> MemStoreFlusher lower bound should be allowed to be lower.
> ----------------------------------------------------------
>
>                 Key: HBASE-4314
>                 URL: https://issues.apache.org/jira/browse/HBASE-4314
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Jonathan Hsieh
>
> It might be nice to have the lower bound of a mem store set to a percentage or some set value such as Math.min(10% of heap, 100MB). 
> As an example, for applications that only bulk load and just want a big read cache, it makes sense that you might have a 10GB heap and set this to 0.02 for 200MB, since memstores are basically unused. An app that writes rarely could be configured to such a low value such as 0.05.   (which is below the current .10 threshold)
> Automatically changing back to the default limit (.35) could be nasty.
> Maybe we should just warn, rather than silently changing config?



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