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https://issues.apache.org/jira/browse/PIG-2397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13247957#comment-13247957
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alex gemini commented on PIG-2397:
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600 map tasks: 2334 sec and 200 map tasks: 2157 sec,I guess join will not
benefit more maps due to it will need read more times small table intermediate
result and deserilized it to java memeory object. can you shared
hdfs_read_bytes metrics?
> Running TPC-H on Pig
> --------------------
>
> Key: PIG-2397
> URL: https://issues.apache.org/jira/browse/PIG-2397
> Project: Pig
> Issue Type: Task
> Reporter: Jie Li
> Attachments: TPC-H_on_Pig.tgz, pig_tpch.ppt
>
>
> For a class project we developed a whole set of Pig scripts for TPC-H. Our
> goals are:
> 1) identifying the bottlenecks of Pig's performance especially of its
> relational operators,
> 2) studying how to write efficient scripts by making full use of Pig Latin's
> features,
> 3) comparing with Hive's TPC-H results for verifying both 1) and 2).
> We will update the JIRA with our scripts, results and analysis soon.
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