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From researcher qiao <>
Subject about jvm reuse
Date Fri, 28 Sep 2012 19:48:51 GMT
deal all,

i was running hive on hadoop. we noticed that there were maps slots
available even though you had many things queued up. so in the hive
interface, before run some query, i input:

set mapred.job.reuse.jvm.num.tasks = 50

i was hoping that this will improve the performance, but it doesnot and
there are many fails, any thoughts?


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