OEM Alert:Host : hostname.localMessage: Loader Throughput (rows per second) for Loader_D crossed the critical threshold (75). Current value: 45.02

Oracle Enterprise Manager cloud control alerts :-

Issue :-

OEM Alert:Host : hostname.localMessage: Loader Throughput (rows per second) for Loader_D crossed the critical threshold (75). Current value: 45.02

Solution :-
add more loader threads by changing the following configuration parameter in emoms.properties file.
$OMS_HOME/sysman/config/emoms.properties

em.loader.threadPoolSize=n

Where 'n' is a positive integer [1-10].
The default is one and any value other than [1-10] will result in the thread pool size defaulting to one.

Changing this parameter will require to restart the Management Service to be reloaded with the new value.

emctl stop oms -all
emctl start oms