https://community.cloudera.com/t5/Archives-of-Support-Questions/Configuring-Yarn-MapReduce2-memory-configuration/m-p/168453#M57680 <P>I have a hadoop cluster on 2 nodes. Each node has 2 cpus and 24 gb memory.</P><P>So I am thinking of having 3 mappers and 3 reducers on each node. That's good?</P><P>So in Ambari -&gt; Yarn -&gt; Configs, can I have :</P><P>Memory allocated for all YARN containers on a node : 18 gb</P><P>Minimum container size (memory) : 1 gb</P><P>Maximum container size (memory) : 4 gb</P><P></P><P>If I configure as per above, then Ambari suggests other configurations based on these values - is that safe to follow?</P><P>Likewise in Ambari -&gt; MapReduce2 -&gt; Configs :</P><P>Not sure what to configure Map Memory, Reduce Memory, Appmaster Memory.</P><P>Appreciate the insights.</P> Wed, 22 Mar 2017 04:00:10 GMT vtpcnk 2017-03-22T04:00:10Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Configuring-Yarn-MapReduce2-memory-configuration/m-p/168453#M57680 <P>I have a hadoop cluster on 2 nodes. Each node has 2 cpus and 24 gb memory.</P><P>So I am thinking of having 3 mappers and 3 reducers on each node. That's good?</P><P>So in Ambari -&gt; Yarn -&gt; Configs, can I have :</P><P>Memory allocated for all YARN containers on a node : 18 gb</P><P>Minimum container size (memory) : 1 gb</P><P>Maximum container size (memory) : 4 gb</P><P></P><P>If I configure as per above, then Ambari suggests other configurations based on these values - is that safe to follow?</P><P>Likewise in Ambari -&gt; MapReduce2 -&gt; Configs :</P><P>Not sure what to configure Map Memory, Reduce Memory, Appmaster Memory.</P><P>Appreciate the insights.</P> Wed, 22 Mar 2017 04:00:10 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Configuring-Yarn-MapReduce2-memory-configuration/m-p/168453#M57680 vtpcnk 2017-03-22T04:00:10Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Configuring-Yarn-MapReduce2-memory-configuration/m-p/168454#M57681 <P>Below is a good read on Determining HDP Memory configs:</P><P><A href="http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.4/bk_installing_manually_book/content/determine-hdp-memory-config.html" target="_blank">http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.4/bk_installing_manually_book/content/determine-hdp-memory-config.html</A></P> Wed, 22 Mar 2017 05:35:15 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Configuring-Yarn-MapReduce2-memory-configuration/m-p/168454#M57681 namaheshwari 2017-03-22T05:35:15Z