Spring Boot Performance Tuning Guide (Production Ready)
A Spring Boot app works fast locally… but slows down under real traffic. Performance tuning is about identifying bottlenecks and optimizing CPU, memory, database, and threads in Spring Boot applications. This guide covers practical production optimizations. đź“Ś Typical Performance Problems High response time High CPU usage Memory spikes Slow database queries Thread starvation đź–Ľ️ Performance Bottlenecks Overview 4 1️⃣ JVM Memory Tuning Default JVM settings are not optimized for production. Recommended JVM options -Xms2g -Xmx2g -XX : + UseG1GC -XX :MaxGCPauseMillis = 200 Why Prevents frequent garbage collection and memory resizing. đź–Ľ️ GC Behavior 4 2️⃣ Thread Pool Optimization Tomcat default threads = 200 (not always correct) Configure server.tomcat.threads.max=100 server.tomcat.accept-count=50 Too many threads → context switching overhead. 3️⃣ Database Performance Most performance issues come from database. Enable connection pooling Spring Boot uses HikariCP (good default) Tune it: sp...