performance-tuning
OpenJDK JVM Deep Dive: The Most Detailed JVM Memory Structure Analysis
·23344 words·110 mins
A comprehensive deep-dive into JVM memory architecture covering heap memory, metaspace, thread stacks, and compressed object pointers. This technical analysis examines memory allocation processes, Native Memory Tracking, and provides practical examples using tools like jol, jhsdb, and JFR for understanding JVM memory management internals.
Gateway Avalanche Crisis: How Synchronous Redis Calls Nearly Brought Down Our System
·1662 words·8 mins
A deep dive into a production incident where our Spring Cloud Gateway experienced cascading failures due to blocking Redis operations. Learn how synchronous API calls in reactive environments can cause thread starvation, leading to health check failures and system-wide avalanches, plus the complete solution using async patterns.
Troubleshooting a SSL Performance Bottleneck Using JFR
·395 words·2 mins
In-depth analysis of a microservice performance issue with CPU spikes and database connection anomalies. Through JFR profiling, we discovered the root cause was Java SecureRandom blocking on /dev/random and provide solutions using /dev/urandom.
OpenJDK 11 JVM Logging: A Comprehensive Guide to the New Unified Configuration
·1397 words·7 mins
Discover how OpenJDK 11 revolutionized JVM logging with its unified configuration system. Learn about essential log tags for GC analysis, class loading, and runtime compilation, plus master dynamic log configuration using jcmd for real-time performance tuning.