31 lines
1.5 KiB
Markdown
31 lines
1.5 KiB
Markdown
# 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 (using nanohttpd and d3.js).
|
|
* 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 (unlike commercial tooling). This way there is no overhead in interprocess communication.
|
|
|
|
# Usage
|
|
* Agent that instruments loaded classes: -javaagent:<path>/perfix.jar
|
|
* Include classes for instrumentation with -Dperfix.includes=com.project. ...etc (includes subpackages)
|
|
* Web page to report executed methods and sql query excutions:
|
|
<br/> * #invocations
|
|
<br/> * total execution time for the method in nanoseconds (this is also the sorting order)
|
|
<br/> * average time in nanoseconds per method (= total/#invocations)
|
|
* The http server starts on port 2048 by default. Use -Dperfix.port=... to adjust.
|
|
|
|
|
|
# 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)
|
|
|
|
# DISCLAIMER:
|
|
This has only been tested on oracle java8 in spring-boot using tomcat web-container
|