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.
Posts tagged with #java
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.
JVM Flags Explained: Standard, -X, and -XX Options for Tuning
Master JVM flags configuration with this comprehensive guide covering standard, -X, and -XX options for production Java performance tuning.
Method Invocation Bytecode
Deep dive into JVM method invocation: invokevirtual, invokestatic, invokespecial, invokeinterface, and invokedynamic explained per the JVM Specification.
Java 9 Module System: Boundaries, Encapsulation, and requires/exports
A guide to the Java 9 Module System covering module boundaries, strong encapsulation, the requires and exports directives, and practical migration patterns.
Java Security Manager: Permission Checks and Policy Files
A deep dive into the Java Security Manager, policy file configuration, permission checks, and how to properly sandbox untrusted code in the JVM.