Message=Listener response to a TNS ping is 5,010 msecs

I am running a enterprise edition db 19C RU15 on a redhat 7 OS Enterprise Manager is 13C5

I have been getting errors from the Enterprise Manager about the listener not responding fast enough to a tns ping. The error is:

Host=xxx.com 

Target type=Listener 

Target name=listener-xxx

Categories=Performance 

Message=Listener response to a TNS ping is 5,010 msecs 

Severity=Critical 

Event reported time=Jun 8, 2022 2:59:45 AM EDT 

Operating System=Linux

Platform=x86_64

Customer Support Identifier=xxxxxxx

Associated Incident Id=18251 

Associated Incident Status=New 

Associated Incident Owner= 

Associated Incident Acknowledged By Owner=No 

Associated Incident Priority=None 

Associated Incident Escalation Level=