perfix

Pretty basic profiling tool for JVM's

Highlights:

• Meant for development time (after process stops, data is gone).
• Minimal memory footprint (agent < 1 mb).
• Easy setup (2 commandline arguments for java process)
• Minimalistic web interface.
• Execution time is measured in nanoseconds
• No manual instrumentation necessary using loadtime bytecode manipulation (javassist).
• No special jdbc configuration necessary (ie no wrapped jdbc driver).
• The agent is also the server (ui backend).

Usage

• Agent that instruments loaded classes: -javaagent:/perfix.jar
• Include classes for instrumentation with -Dperfix.includes=com.project. ...etc (includes subpackages)
• Web page to report executed methods and sql query excutions:
  * #invocations
  * total execution time for the method in nanoseconds (this is also the sorting order)
  * average time in nanoseconds per method (= total/#invocations)
• The backend starts on port 2048 by default. Use -Dperfix.port=... to adjust.
• Start the UI using npm install followed by npm start. the UI starts on port 3000 by default.

roadmap

• Overhead (in method execution time) not clear yet. I wouldn't use it in production.
• Finish jdbc query logging (CallableStatement)
• Implement an actual call stack the way commercial tools work
• Ability to dynamically turn off metrics to minimize cpu and memory overhead (when response time is below a set treshold)
• extend the user interface

DISCLAIMER:

This has only been tested on oracle java8 in spring-boot using tomcat web-container