YGC | BestHub

DeWu Technology

Jul 13, 2022 · Backend Development

Diagnosing G1 Young GC Slowdown Caused by Excessive XStream ClassLoader Creation

The investigation revealed that repeatedly creating XStream objects generated thousands of CompositeClassLoader instances, inflating the JVM’s SystemDictionary and causing extremely long Ext Root Scanning during G1 Young GC pauses, which was resolved by caching XStream per class and reducing YGC pauses from seconds to milliseconds.

ClassLoaderG1GCJava

0 likes · 17 min read

Diagnosing G1 Young GC Slowdown Caused by Excessive XStream ClassLoader Creation

Full-Stack Internet Architecture

Oct 11, 2021 · Fundamentals

Understanding YGC (Young Generation Garbage Collection) Latency: Key Phases and Optimization Strategies

This article analyzes the main factors that contribute to Young Generation GC (YGC) latency in the JVM, covering safe‑point pauses, live object scanning and marking, object copying, GC log overhead, and OS activity, and offers practical tips for diagnosing and reducing pause times.

Garbage CollectionJVMJava

0 likes · 8 min read

Understanding YGC (Young Generation Garbage Collection) Latency: Key Phases and Optimization Strategies

Qunar Tech Salon

Nov 21, 2016 · Fundamentals

Why YGC Slows Down: The Impact of String.intern and StringTable on Young Generation GC

This article explains how excessive use of String.intern can enlarge the JVM's StringTable, causing the Young Generation Garbage Collection (YGC) to take longer, and provides a demo, code analysis, and practical tips for diagnosing and mitigating the slowdown.

Garbage CollectionJVMJava

0 likes · 9 min read

Why YGC Slows Down: The Impact of String.intern and StringTable on Young Generation GC