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https://issues.apache.org/jira/browse/HBASE-12128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14225408#comment-14225408
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Hudson commented on HBASE-12128:
--------------------------------
FAILURE: Integrated in HBase-1.0 #503 (See
[https://builds.apache.org/job/HBase-1.0/503/])
HBASE-12128 Cache configuration and RpcController selection for Table in
Connection (enis: rev b9dfcd01b8248cecdd8fc06632c738fe863af823)
* hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTable.java
*
hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableConfiguration.java
*
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionManager.java
> Cache configuration and RpcController selection for Table in Connection
> -----------------------------------------------------------------------
>
> Key: HBASE-12128
> URL: https://issues.apache.org/jira/browse/HBASE-12128
> Project: HBase
> Issue Type: Sub-task
> Affects Versions: 1.0.0, 2.0.0
> Reporter: Andrew Purtell
> Assignee: Stephen Yuan Jiang
> Fix For: 2.0.0, 0.99.2
>
> Attachments: HBASE-12128.v1-1.0.patch, HBASE-12128.v1-2.0.patch,
> HBASE-12128.v2-2.0.patch
>
> Original Estimate: 120h
> Time Spent: 72h
> Remaining Estimate: 48h
>
> Creating Table instances should be lightweight. Apps that manage their own
> Connections are expected to create Tables on demand for each interaction.
> However we look up values from Hadoop Configuration when constructing Table
> objects for storing to some of its fields. Configuration is a heavyweight
> registry that does a lot of string operations and regex matching. Method
> calls into Configuration account for 48.25% of CPU time when creating the
> HTable object in 0.98. Another ~48% of CPU is spent constructing the desired
> RpcController object via reflection in 0.98. Together this can account for
> ~20% of total on-CPU time of the client. See parent issue for more detail.
> We are using Connection like a factory for Table. We should cache
> configuration for Table in Connection. We should also create by reflection
> once and cache the desired RpcController object, and clone it for new Tables.
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