we have spark production cluster with YARN service ( based on HDP 2.6.5 version )
total node-managers services are - 745 ( actually 745 Linux machines )
and yarn active resource-manager and standby resourcemanager are installed on different masters machines
we found that the following parameters not defined in our YARN configuration ( yarn-site.xml ) !
and above parameters not defined not in Ambari and not in YARN XML configuration files!
I want to know what the meaning of the parameter - yarn.scheduler.increment-allocation-vcores ?
and what is the affect if this parameters are not defined in our configuration?
from YARN best practice configuration we are understanding that both parameters are part of YARN configuration , but we not sure if we must to add them to YARN custom configuration
from documentation we found: