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The following page has been changed by DevarajDas: http://wiki.apache.org/lucene-hadoop/FAQ ------------------------------------------------------------------------------ * `mapred.job.tracker.handler.count = 60` * `mapred.reduce.parallel.copies = 50` * `tasktracker.http.threads = 50` + * `mapred.child.java.opts = -Xmx1024m` == 4. Do I have to write my application in Java? ==