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From "cuijianwei (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8220) can we record the count opened HTable for HTablePool
Date Mon, 01 Apr 2013 08:47:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13618699#comment-13618699
] 

cuijianwei commented on HBASE-8220:
-----------------------------------

Thanks for your comment, I add a new patch which including:
commont#1 fixed
comment#2 fixed
comment#3 add more specific comment at the place we call 'decrementAndGet'
comment#4 fixed
comment#5 the path is made over 0.94 branch
I'm sorry that I don't construct a test suite environment, do we have common platform to run
the test suite?

                
> can we record the count opened HTable for HTablePool
> ----------------------------------------------------
>
>                 Key: HBASE-8220
>                 URL: https://issues.apache.org/jira/browse/HBASE-8220
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client
>    Affects Versions: 0.94.3
>            Reporter: cuijianwei
>         Attachments: HBASE-8220-0.94.3.txt, HBASE-8220-0.94.3.txt
>
>
> In HTablePool, we have a method getCurrentPoolSize(...) to get how many opened HTable
has been pooled. However, we don't know ConcurrentOpenedHTable which means the count of HTable
get from HTablePool.getTable(...) and don't return to HTablePool by PooledTable.close(). The
ConcurrentOpenedHTable may be meaningful because it indicates how many HTables should be opened
for the application which may help us set the appropriate MaxSize of HTablePool. Therefore,
we can and a ConcurrentOpenedHTable as a counter in HTablePool.

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