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Hadoop, mail # user - memory usage tasks


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memory usage tasks
Koert Kuipers 2012-06-09, 00:49
silly question, but i have our hadoop slave boxes configured with 7 mappers
each, yet i see java 14 process for user mapred on each box. and each
process takes up about 2GB, which is equals to my memory allocation
(mapred.child.java.opts=-Xmx2048m). so it is using twice as much memory as
i expected! why is that?
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Harsh J 2012-06-09, 12:21