Hello, I have a job that requires a bit more memory than the default for the reducer (not for the mapper). So for this I have this property in my configuration file:
mapreduce.reduce.java.opts=-Xmx4000m When I run the job, I can see its configuration in the web interface and I see that indeed I have mapreduce.reduce.java.opts set to -Xmx4000m but I also have mapred.child.java.opts set to -Xmx200m and when I ps -ef the java process, it is using -Xmx200m. So to make my job work I had to set mapred.child.java.opts=-Xmx4000m in my configuration file. However I don't need that much memory for the mapper. How can I set more memory only for the mapper ? Is the only solution to set mapred.child.java.opts to -Xmx4000m, mapreduce.reduce.java.opts to -Xmx4000m and mapreduce.map.java.opts to -Xmx200m ? I am using hadoop 1.0.1. Thank you very much, Juan
