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MapReduce >> mail # user >> How to set the handler count related parameters?


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How to set the handler count related parameters?
Hi,

We have 20 nodes cluster(1 namenode, 1 jobtracker, 18 datanodes).  Each
node has 20 cpu cores and 64 GB memory.

How to set the values for following parameters?

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*dfs.namenode.handler.count- dfs.datanode.handler.count- *
*mapreduce.jobtracker.handler.count*
- *mapred.child.java.opts*

Thanks very much!
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB