Can you list types of system monitors and their features?

System monitors can be divided into several types depending on what exactly they track:

• Performance Monitors — track CPU load, memory usage, disk, network. They help identify bottlenecks in the system.
• Process Monitors — monitor the status and resources of specific processes, such as memory usage, runtime, number of threads.
• Event Monitors — record system events, errors, warnings, which is useful for troubleshooting.
• Security Monitors — track unauthorized access attempts, changes in the system.

Each type of monitor has its own features and tools. For example, in Java, JMX (Java Management Extensions) is often used for monitoring, allowing real-time data retrieval about JVM and application performance.