lambda probe是一個tomcat性能監控工具，它提供了比tomcat管理控制檯更加強大的功能，它自身也是一個web應用，直接部署到tomcat下就可以通過web方式來訪問了.
lambda probe提供了非常豐富的功能，下面是它的一些特性：
* Comprehensive JVM memory usage monitor.
* JBoss compatibility
* Display of deployed applications, their status, session count, session object count, context object count, datasource usage etc.
* Start, stop, restart, deploy and updeploy of applications
* Ability to view deployed JSP files
* Ability to compile all or selected JSP files at any time.
* Ability to pre-compile JSP files on application deployment.
* Ability to view auto-generated JSP servlets
* Display of list of sessions for a particular application
* Display of session attributes and their values for a particular application. Ability to remove session attributes.
* Ability to view application context attributes and their values.
* Ability to expire selected sessions
* Graphical display of datasource details including maximum number of connections, number of busy connections and configuration details
* Ability to group datasource properties by URL to help visualizing impact on the databases
* Ability to reset data sources in case of applications leaking connection
* Display of system information including System.properties, memory usage bar and OS details
* Display of JK connector status including the list of requests pending execution
* Real-time connector usage charts and statistics.
* Real-time cluster monitoring and clulster traffic charts
* Real time OS memory usage, swap usage and CPU utilisation monitoring
* Ability to show information about log files and download selected files
* Ability to tail log files in real time from a browser.
* Ability to interrupt execution of “hang” requests without server restart
* Ability to restart Tomcat/JVM via Java Serview Wrapper.
* Availability “Quick check”
網址: http://www.lambdaprobe.org/d/index.htm
在線演示: http://demo.lambdaprobe.org/ 用戶名密碼爲demo/demo 。
