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From Steve Loughran <ste...@apache.org>
Subject Re: How to do load control of MapReduce
Date Tue, 12 May 2009 10:53:39 GMT
zsongbo wrote:
> Hi Stefan,
> Yes, the 'nice' cannot resolve this problem.
> 
> Now, in my cluster, there are 8GB of RAM. My java heap configuration is:
> 
> HDFS DataNode : 1GB
> HBase-RegionServer: 1.5GB
> MR-TaskTracker: 1GB
> MR-child: 512MB   (max child task is 6, 4 map task + 2 reduce task)
> 
> But the memory usage is still tight.

does TT need to be so big if you are running all your work in external VMs?

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