JVM in Containers: Cgroup Memory Limits and Heap Sizing
A guide to how the JVM detects container memory limits, configures heap accordingly, and avoids pitfalls when running Java in Docker and Kubernetes.
Posts tagged with #java
GC Logging Analysis: Decoding JVM Garbage Collection Logs
Master JVM garbage collection log analysis with -Xlog:gc, GCEasy, and GCViewer. Practical guide to diagnosing memory issues and tuning performance.
Heap Walking and Allocation Tracking: TLABs and Heap Analysis
Understand how the JVM allocates memory with TLABs, how to track allocations with low overhead, and how heap walking tools analyze object graphs.
Java Bytecode Fundamentals
Explore the low-level representation of Java code: op codes, the stack-based JVM architecture, and local variable table mechanics.
Java Flight Recorder: Continuous Monitoring and Diagnostics
Learn how Java Flight Recorder captures low-level diagnostics, profiling data, and continuous monitoring events from the JVM in production environments.
Java Memory Model: Happens-Before, Volatile, and Final Fields
Understanding happens-before guarantees, volatile field semantics, and final field safety in the Java Memory Model for correct concurrent code.
java.util.concurrent: Thread Pools, ForkJoinPool, Synchronizers
Master Java's java.util.concurrent: Executors, ForkJoinPool, CountDownLatch, CyclicBarrier, Phaser, and thread pool patterns for high-performance apps.
JIT Compilation Internals
Understand how the JVM's Just-In-Time compiler detects hot code, applies compilation thresholds, and manages the code cache for peak performance.
JMX and MXBeans: JVM Hotspot Diagnostics and Custom MBeans
Learn how to use JMX and MXBeans to monitor JVM memory pools, perform hotspot diagnostics, and build custom MBeans for production observability.
JVM Architecture Overview: Understanding the Java Virtual Machine
A deep dive into the JVM architecture covering Class Loader, Runtime Data Areas, and Execution Engine components that power Java applications.