PSI Probe Tomcat的管理和监控

PSI Probe 是一个 Lambda Probe 的后续版本，主要是为了替换 Tomcat 自带的管理器，可方便的管理和监控 Tomcat 实例。

主要特性：

• Requests: Monitor traffic in real-time, even on a per-application basis.

• Sessions: Browse/search attributes, view last IP, expire, estimate size.

• JSP: Browse, view source, compile.

• Data Sources: View pool usage, execute queries.

• Logs: View contents, download, change levels at runtime.

• Threads: View execution stack, kill.

• Connectors: Status, usage charts.

• Cluster: Status, usage charts.

• JVM: Memory usage charts, advise GC

• Java Service Wrapper: Restart JVM.

• System: CPU usage, memory usage, swap file usage.