Configuration File
| Configuration Setting | Value Calculation | 8G VM (4G For MR) | |
| yarn-site.xml | yarn.nodemanager.resource.memory-mb | = containers * RAM-per-container | 4096 |
| yarn-site.xml | yarn.scheduler.minimum-allocation-mb | = RAM-per-container | 1024 |
| yarn-site.xml | yarn.scheduler.maximum-allocation-mb | = containers * RAM-per-container | 4096 |
| mapred-site.xml | mapreduce.map.memory.mb | = RAM-per-container | 1024 |
| mapred-site.xml | mapreduce.reduce.memory.mb | = 2 * RAM-per-container | 2048 |
| mapred-site.xml | mapreduce.map.java.opts | = 0.8 * RAM-per-container | 819 |
| mapred-site.xml | mapreduce.reduce.java.opts | = 0.8 * 2 * RAM-per-container | 1638 |
| yarn-site.xml (check) | yarn.app.mapreduce.am.resource.mb | = 2 * RAM-per-container | 2048 |
| yarn-site.xml (check) | yarn.app.mapreduce.am.command-opts | = 0.8 * 2 * RAM-per-container | 1638 |
| tez-site.xml |
tez.am.resource.memory.mb |
= RAM-per-container |
1024 |
| tez-site.xml |
tez.am.java.opts |
= 0.8 * RAM-per-container |
819 |
| tez-site.xml |
hive.tez.container.size |
= RAM-per-container |
1024 |
| tez-site.xml |
hive.tez.java.opts |
= 0.8 * RAM-per-container |
819 |
原文：http://www.cnblogs.com/jackchen001/p/6404897.html