Thank you that worked! Juan
On Mon, Apr 2, 2012 at 12:55 PM, Harsh J <ha...@cloudera.com> wrote: > For 1.0, the right property is "mapred.reduce.child.java.opts". The > "mapreduce.*" style would apply to MR in 2.0 and above. > > On Mon, Apr 2, 2012 at 3:00 PM, Juan Pino <juancitomiguel...@gmail.com> > wrote: > > 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 > > > > -- > Harsh J >
