Allocating Memory for the OS, MapR Filesystem, and Hadoop Services

Warden allocates memory to the operating system, MapR Filesystem, and MapR Hadoop services based on the following parameters:

Parameter Default OS MapR Filesystem Hadoop Service(s) Description




varies Defines the heap size percentage.
service.command.<os|mfs|servicename>.heapsize.maxpercent 85 Defines the heap size maximum percentage


4000 5000 Defines the maximum heap size in MB.
service.command.<os|mfs|servicename>.heapsize.min 256 512 256 Defines the minimum heap size in MB.

A dash (—) indicates that the cell value is not used or not applicable.

Memory settings for the operating system and MapR Filesystem are configured in the warden.conf file. The warden.conf file is located in /opt/mapr/conf. Other services, such as NodeManager and ResourceManager, have their own warden.<servicename>.conf file within /opt/mapr/conf/conf.d. For more information about the Warden files, see warden.conf and warden.<servicename>.conf.

Note: Warden only allocates resources for MapR Hadoop services associated with roles that are installed on the node.