We are getting these alarms very frequently, and checked there was no issue on the vCenter, They were up and running fine.
Release : 9.2.0
Component : UIM - VMWARE
Please also make sure you're using vmware-7.1.4-HF3.
And make sure you check the sizing guidelines but you should have at least 2048/4096 java heap min and max configured. Its normally much higher for a larger environment. You can find sizing recommendations here:
After configuring the memory, deactivate the probe then activate it.
vmware FAQs guide is attached as well.