After the application upgraded their database to Oracle 19c and changed to the osjdb6 (11.2.0.4) driver, the JMX JDBCDataSourceRuntime metrics stopped reporting for the Oracle 19c db connection pool but continued to report for the Oracle 11g db connection pool.
Release : 10.7.0
Component : APM Agents
In the agent logs
[WARN] [IntroscopeAgent.Clamp] JMX metric clamp has been hit, no additional JMX metrics will be reported
customer was hitting the clamp introscope.agent.jmx.clamp=500. He increased to 5000 and is now able to see the missing metrics.
IntroscopeAgent.profile
# Changing this property requires restarting the Monitored Process
introscope.agent.jmx.clamp=5000