[AMBARI-5400] Inefficient default Map heap size values set by Ambari

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.5.1
• Fix Version/s: 1.5.1
• Component/s: ambari-web
• Assignee: Srimanth Gunturi
• Reporter: Srimanth Gunturi
• Created: 09/Apr/14 00:37
• Updated: 09/Apr/14 02:02
• Resolved: 09/Apr/14 02:02

Description

Currently Ambari calculates the number of containers per node, and the size of each container. This size is used to set the java heap size for Maps and Reduces.

Ambari sets the Map heap size using the following formula - which is inefficient usage of resources.

map_memory = math.floor(container_ram / 2)