31 lines
1.5 KiB
Markdown
31 lines
1.5 KiB
Markdown
# perfix
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Pretty basic profiling tool for JVM's
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# Highlights:
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* Meant for development time (after process stops, data is gone).
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* Minimal memory footprint (agent < 1 mb).
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* Easy setup (2 commandline arguments for java process)
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* Minimalistic web interface.
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* Execution time is measured in nanoseconds
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* No manual instrumentation necessary using loadtime bytecode manipulation (javassist).
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* No special jdbc configuration necessary (ie no wrapped jdbc driver).
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* The agent is also the server (unlike commercial tooling). This way there is no overhead in interprocess communication.
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# Usage
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* Agent that instruments loaded classes: -javaagent:<path>/perfix.jar
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* Include classes for instrumentation with -Dperfix.includes=com.project. ...etc (includes subpackages)
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* Web page to report executed methods and sql query excutions:
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<br/> * #invocations
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<br/> * total execution time for the method in nanoseconds (this is also the sorting order)
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<br/> * average time in nanoseconds per method (= total/#invocations)
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* The http server starts on port 2048 by default. Use -Dperfix.port=... to adjust.
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# roadmap
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* Overhead (in method execution time) not clear yet. I wouldn't use it in production.
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* Finish jdbc query logging (CallableStatement)
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* Implement an actual call stack the way commercial tools work
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* Ability to dynamically turn off metrics to minimize cpu and memory overhead (when response time is below a set treshold)
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# DISCLAIMER:
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This has only been tested on oracle java8 in spring-boot using tomcat web-container
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