‘Samsung Research America’ engaged us to give 2 days onsite training on the topic ‘JVM performance engineering & troubleshooting‘.Training was given in Samsung’s corporate office located in Mountain View, California (heart of silicon valley). Continue reading “TRAINING TO SAMSUNG”
Workday, leader in cloud ERP system for Finance, HR and planning is our customer. On Feb’ 21, 2019 Workday invited our architect Ram Lakshmanan to their headquarters located in Pleasanton, CA Continue reading “WORKDAY – GUEST LECTURE”
JVM memory has multiple regions, some are known (Young Generation, Old Generation, Metaspace). Some are unknown (Threads, JNI, Socket Buffers,…). You will understand the purpose of each region in JVM memory. Continue reading “JVM MEMORY – LEARN EASILY (VIDEO)”
Popular Concurrent Mark Sweep (CMS) GC algorithm is deprecated in JDK 9. According to JEP-291, this decision has been made to reduce the maintenance burden of GC code base and accelerate new development. Continue reading “CMS DEPRECATED. NEXT STEPS?”
In some of the GC logs, timestamps of GC events are printed in relative format i.e.
[0.209s] .....
Continue reading “PAINTING GRAPHS IN ABSOLUTE TIMESTAMP FORMAT”
Eclipse Memory Analyzer (MAT) is a powerful tool for heap dump analysis. It has several great features to debug memory problems effectively. Continue reading “ECLIPSE MAT – INCOMING REFERENCES, OUTGOING REFERENCES”
Developers take advantage of the JVM argument -XX:+UseGCLogFileRotation to rotate GC log files. Continue reading “Try to avoid -XX:+UseGCLogFileRotation”
Eclipse MAT (Memory Analyzer Tool) is a powerful tool to analyze heap dumps. It comes quite handy when you are trying to debug memory related problems. In Eclipse MAT two types of object sizes are reported: Continue reading “SHALLOW HEAP, RETAINED HEAP”
Java.lang.VirtualMachineError is thrown when Java virtual machine encounters any internal error or resource limitation which prevents it from functioning. Continue reading “VIRTUAL MACHINE ERROR”
