Recently a smart engineering manager from a major financial institution asked the question: ‘We are already using APM tool (AppDynamics), why do we need to use GC log analysis tool (GCeasy)?’. Fair question that deserves detailed answer. There are angles to this question:
Continue reading “GC LOG ANALYSIS COMPLIMENTS APM”
GC logs are vital artifacts to troubleshoot memory/CPU related problems and optimize applications performance. In Sep 2017, much-awaited java 9 got released. In Java 9, GC logging has been re-implemented using Unified GC logging framework (JEP 271). Some changes are surprising and some changes might be shocking.
Continue reading “DISRUPTIVE CHANGES TO GC LOGGING IN JAVA 9. WHAT YOU NEED TO DO?”
Based on the JVM version (1.4, 5, 6, 7, 8, 9), JVM vendor (Oracle, IBM, HP, Azul, Android), GC algorithm (Serial, Parallel, CMS, G1, Shenandoah) and few other settings, GC log format changes. Thus, today the world has ended up with several GC log formats.
Continue reading “GC LOG STANDARDIZATION API”
Time taken by every single GC event is reported in the GC log. In every GC event, there are ‘user’, ‘sys’, and ‘real’ time. Continue reading “SYS TIME GREATER THAN USER TIME”
Time taken by every single GC event is reported in the GC log. In every GC event, there are ‘user’, ‘sys’, and ‘real’ time. Continue reading “REAL TIME IS GREATER THAN USER AND SYS TIME”
In Java 9, G1 GC will become the default garbage collector. One of the key features of G1 Garbage collector is its ability to limit the GC pause time (i.e. you can set the desired maximum pause time) without compromising on throughput.
Continue reading “UNDERSTANDING G1 GC LOG FORMAT”