If you left peanut butter and jelly sandwiches behind in your childhood, it just might be time to try one again. Even though jelly has sugar, the combination of peanut butter and bread provides protein, B vitamins, iron and zinc. Peanut butter is also a good choice for healthy unsaturated fats.
SAP Host Agent is an agent that can accomplish several life-cycle management tasks, such as operating system monitoring, database monitoring, system instance control and provisioning. In the context of the SAP Solution Manager, the Diagnostics Agents use several functions of the SAP Host Agent to collect data from the monitored systems and hosts.
Agent-based means that you will need to install some sort of agent (service) on all computers that are to be monitored. The advantage of agent-based monitoring systems is that they can monitor the event logs in real time, with a minimum amount of CPU time and network bandwidth used. Agent-based systems usually don't impact the system noticably and don't require a central computer designated to event log monitoring.