By default, the Oracle Exadata (oracle.sysman.xa) and Oracle Database (oracle.sysman.db) plug-ins are deployed to your OMS during the OMS installation, and the parts of the plug-ins necessary for discovering the targets of the types are deployed to an agent when you install/deploy the agent. Thus, normally it is not necessary to manually deploy the plug-ins to an agent.
You may want to make sure that your OMS has the latest versions of the Oracle Exadata and Oracle Database plug-ins before discovering the targets. As of now, the latest version for both plug-ins is 18.104.22.168.
Note: The current version of Oracle Exadata Healthchecks plug-in, which is optional, is 22.214.171.124.
thanks very much, Loc.
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