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.