...

Count of path updates in Sentry:(Need to check if this handled handles compacted numbers as well)
org.apache.sentry.hdfs.SentryHDFSServiceProcessor.paths-updates-size
org.apache.sentry.hdfs.SentryHDFSServiceProcessor.handle-hms-notification.path-changes-size

...

"org.apache.sentry.hdfs.SentryHDFSServiceProcessor.handle-hms-notification.has-full-image-num"

Memory related metrics:

TODOVarious memory metrics (TODO)