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From Robert Evans <ev...@yahoo-inc.com>
Subject Re: how to specify -Xmx option in a hadoop jar command ?
Date Thu, 28 Apr 2011 21:47:38 GMT
Which JVM?  The Mapper one, the Reducer one, or the one that is launching all of it?

mapred.child.java.opts will set the mapper and the reducer.  If it is the one you are launching
then the HADOOP_OPTS environment variable should be what you want to use.

--Bobby Evans

On 4/28/11 4:26 PM, "Mapred Learn" <mapred.learn@gmail.com> wrote:

I am runnnig a hadoop jar command as:
hadoop --config <> jar <jarname> <main class> -conf <conf file>

My question is how and where can I specify -Xmx option to increase heap assigned to my JVM

Thanks in advance

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