perfix

Pretty basic profiling tool for JVM's

Highlights:

• Provides method and SQL statement execution times. (Somehow it gives me more info than Java Mission Control)
• Meant for development time (after process stops, data is gone).
• Minimalistic commandline interface (ssh).
• Execution time is measured in nanoseconds, reported in milliseconds (this way the totals and averages are most precise, but also human readable).
• 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 (unlike commercial tooling). This way there is no overhead in interprocess communication.
• Minimal memory footprint (agent is 2.5 mb).
• Overhead (in method execution time) not clear yet. I wouldn't use it in production.

Usage

• Agent that instruments loaded classes: -javaagent:/perfix.jar
• Include classes for instrumentation with -Dperfix.includes=com.project. ...etc (includes subpackages)
• Ssh interface 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 ssh server starts on port 2048 by default. Use -Dperfix.port=... to adjust.

roadmap

• Finish jdbc query recording (CallableStatement)
• Make output format configurable
• Implement password login (now any)
• Add web interface (maybe)
• Implement an actual call stack the way commercial tools work

DISCLAIMER:

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