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Meituan Technology Team
Meituan Technology Team
Dec 2, 2016 · Backend Development

Comprehensive Performance Optimization Strategies and Real-World Cases

The article presents a comprehensive set of performance‑optimization strategies—from code‑level refactoring, SQL tuning, and caching patterns to asynchronous processing, NoSQL selection, JVM and multithreading tuning—alongside real‑world cases that cut job runtimes from over 50 minutes to under 15 minutes and dramatically reduce database load.

AsynchronousBackendJVM
0 likes · 23 min read
Comprehensive Performance Optimization Strategies and Real-World Cases
MaGe Linux Operations
MaGe Linux Operations
Oct 27, 2016 · Backend Development

Master JVM Performance: Essential Tools (jps, jstack, jmap, jstat, hprof)

Learn how to diagnose and resolve common Java performance issues such as OutOfMemoryError, thread deadlocks, and high CPU usage by using built‑in JVM tools—including jps, jstack, jmap, jhat, jstat, and hprof—through detailed command examples, output explanations, and practical profiling techniques.

JVMJavaMonitoring Tools
0 likes · 11 min read
Master JVM Performance: Essential Tools (jps, jstack, jmap, jstat, hprof)
Meituan Technology Team
Meituan Technology Team
Sep 23, 2016 · Fundamentals

Understanding G1 Garbage Collector: Key Concepts, Regions, SATB, RSet, and Pause Prediction Model

The G1 Garbage‑First collector is a server‑side, region‑based Java GC designed for multi‑processor, large‑memory systems that concurrently marks objects using SATB, tracks cross‑region references with RSets, and employs a pause‑prediction model to meet user‑specified pause‑time goals while maintaining high throughput.

Garbage CollectionJVMJava
0 likes · 15 min read
Understanding G1 Garbage Collector: Key Concepts, Regions, SATB, RSet, and Pause Prediction Model
Architect
Architect
May 25, 2016 · Big Data

How Flink Manages Memory to Overcome JVM Limitations

The article explains how Flink tackles JVM memory challenges by using proactive memory management, a custom serialization framework, cache‑friendly binary operations, and off‑heap memory techniques to reduce GC pressure, avoid OOM, and improve performance in big‑data workloads.

Big DataFlinkJVM
0 likes · 17 min read
How Flink Manages Memory to Overcome JVM Limitations
Qunar Tech Salon
Qunar Tech Salon
May 9, 2016 · Backend Development

Comprehensive Overview of Java Locks: Fair, Unfair, Spin, Reentrant, Biased, Lightweight, Heavyweight, and More

This article provides a detailed explanation of various Java lock mechanisms—including fair and unfair locks, spin locks, lock elimination, lock coarsening, reentrant, class and object locks, biased, lightweight, heavyweight, pessimistic and optimistic locks—as well as practical code examples and a lock state table to help developers understand concurrency control in the JVM.

JVMJavaLocks
0 likes · 16 min read
Comprehensive Overview of Java Locks: Fair, Unfair, Spin, Reentrant, Biased, Lightweight, Heavyweight, and More
Art of Distributed System Architecture Design
Art of Distributed System Architecture Design
Apr 27, 2016 · Fundamentals

Understanding the G1 (Garbage‑First) Garbage Collector in Java

The article explains the design, operation, and performance characteristics of Java's G1 (Garbage‑First) collector, covering its parallelism, generational approach, space‑efficiency, pause‑time predictability, implementation details, execution phases, benchmark results, and practical recommendations for choosing a collector.

G1Garbage CollectionJVM
0 likes · 16 min read
Understanding the G1 (Garbage‑First) Garbage Collector in Java
Java Captain
Java Captain
Apr 9, 2016 · Fundamentals

Key Java Fundamentals: JVM, JRE, JDK, Environment Variables, Data Types, Memory, and More

This article provides concise explanations of core Java concepts including the differences between JVM, JRE and JDK, the roles of PATH and CLASSPATH, variable usage, operators, naming rules, data types, type conversion, Java architecture tiers, cross‑platform nature, signed number representations, functions, overloading, arrays, and memory structure.

Data TypesJREJVM
0 likes · 6 min read
Key Java Fundamentals: JVM, JRE, JDK, Environment Variables, Data Types, Memory, and More
DevOps
DevOps
Apr 7, 2016 · Fundamentals

The Story of a Java Class in the JVM

Through a whimsical tale of a class named Account, the article explains Java class loading, the hierarchy of classloaders, bytecode execution, the method area, stack, heap, garbage collection, and debugging, providing an engaging overview of JVM fundamentals.

Garbage CollectionJVMJava
0 likes · 13 min read
The Story of a Java Class in the JVM
21CTO
21CTO
Aug 14, 2015 · Databases

Mastering Elasticsearch: Real-World Indexing & Query Performance Tips

This article shares practical Elasticsearch experience covering index and query performance optimization, shard routing strategies, JVM tuning, daily maintenance, and answers to common production questions, providing actionable guidance for building high‑availability search clusters.

ElasticsearchJVMTuning
0 likes · 16 min read
Mastering Elasticsearch: Real-World Indexing & Query Performance Tips
MaGe Linux Operations
MaGe Linux Operations
Mar 18, 2015 · Fundamentals

Unlocking Java Memory: How Garbage Collection Works and Why It Matters

This article explores Java's garbage collection mechanisms, detailing why memory reclamation is essential, the design considerations, various algorithms such as mark‑sweep, copy, and compact, the roles of different collectors like Serial, Parallel, CMS, and G1, and how they impact performance.

GC AlgorithmsGarbage CollectionJVM
0 likes · 8 min read
Unlocking Java Memory: How Garbage Collection Works and Why It Matters
Qunar Tech Salon
Qunar Tech Salon
Jan 8, 2015 · Fundamentals

Understanding JVM Performance Limits and Tuning Strategies

The article examines the inherent scalability constraints of the JVM, explains how memory walls and pause times affect enterprise Java applications, and presents practical tuning parameters and architectural considerations to mitigate performance bottlenecks in production environments.

Garbage CollectionJVMJava
0 likes · 18 min read
Understanding JVM Performance Limits and Tuning Strategies
Qunar Tech Salon
Qunar Tech Salon
Jan 7, 2015 · Fundamentals

Understanding the C4 Garbage Collector: A Concurrent Continuously Compacting Collector for Low‑Latency Java Applications

This article explains the design, phases, and practical implications of the C4 concurrent continuously compacting garbage collector, comparing it with G1 and IBM's Balanced GC, and provides guidance on when to choose C4 for enterprise Java workloads requiring low pause times and high scalability.

C4Garbage CollectionJVM
0 likes · 21 min read
Understanding the C4 Garbage Collector: A Concurrent Continuously Compacting Collector for Low‑Latency Java Applications
Qunar Tech Salon
Qunar Tech Salon
Jan 6, 2015 · Backend Development

JVM Performance Optimization Part 3 – Garbage Collection

This article explains Java's memory model and garbage collection mechanisms, covering reference counting, tracing collectors, copying and mark‑sweep algorithms, parallel and concurrent collectors, generational GC, and compression techniques, while discussing their trade‑offs, tuning considerations, and impact on application performance.

GC AlgorithmsGarbage CollectionJVM
0 likes · 25 min read
JVM Performance Optimization Part 3 – Garbage Collection
Qunar Tech Salon
Qunar Tech Salon
Jan 5, 2015 · Fundamentals

Understanding Java Compilers and JVM Optimization Techniques

This article explains the role of Java compilers, compares static, client, server and tiered compilation, and describes common JVM optimizations such as dead‑code elimination, inlining, and loop transformations to improve Java application performance.

JITJVMJava
0 likes · 19 min read
Understanding Java Compilers and JVM Optimization Techniques
Qunar Tech Salon
Qunar Tech Salon
Jan 3, 2015 · Fundamentals

Introduction to the Java Virtual Machine: Architecture, Garbage Collection, and Performance

This article provides a comprehensive overview of the Java Virtual Machine, explaining its role in enabling "write once, run anywhere," detailing the compilation process, JIT optimization, memory allocation strategies such as TLAB, various garbage‑collection algorithms, and how these factors impact Java application performance and scalability.

Garbage CollectionJITJVM
0 likes · 19 min read
Introduction to the Java Virtual Machine: Architecture, Garbage Collection, and Performance
MaGe Linux Operations
MaGe Linux Operations
Dec 15, 2014 · Fundamentals

Mastering JVM Garbage Collectors: Which One Fits Your Application?

This article explains the main JVM garbage collectors—including Serial, ParNew, Parallel Scavenge, Serial Old, Parallel Old, CMS, and G1—detailing their algorithms, use cases, advantages, and configuration options, and provides visual diagrams and parameter tables for clear understanding.

Garbage CollectionJVMJava
0 likes · 8 min read
Mastering JVM Garbage Collectors: Which One Fits Your Application?
Qunar Tech Salon
Qunar Tech Salon
Dec 9, 2014 · Fundamentals

Oracle Announces Second Set of Java 9 Features Including Unified JVM Logging, Compiler Controls, and Module System Enhancements

Oracle has revealed the remaining four Java 9 JEPs—unified JVM logging, finer‑grained compiler controls, removal of obsolete garbage‑collector combos, and fixes to the Coin project—while also confirming modularization, DTLS support, HTML5 Javadoc output, and upcoming import‑warning clean‑up, signaling a clearer roadmap for the next Java release.

JDKJEPJVM
0 likes · 5 min read
Oracle Announces Second Set of Java 9 Features Including Unified JVM Logging, Compiler Controls, and Module System Enhancements
Qunar Tech Salon
Qunar Tech Salon
Nov 10, 2014 · Fundamentals

Introduction to Java Memory Allocation and Garbage Collection

This tutorial introduces Java's automatic memory allocation and garbage collection managed by the JVM, explains key terminology such as JDK, JVM, JRE, outlines the JVM architecture and heap memory structure—including young, old, and permanent generations—providing essential fundamentals for understanding Java GC.

Garbage CollectionJVMJava
0 likes · 6 min read
Introduction to Java Memory Allocation and Garbage Collection
MaGe Linux Operations
MaGe Linux Operations
Aug 26, 2014 · Backend Development

Master JVM Tuning: Proven Settings to Eliminate Full GC Pauses

Learn how to optimize JVM parameters to prevent frequent Full GC pauses, improve throughput, and maintain zero‑downtime for high‑traffic websites, with practical tips on memory sizing, survivor space, CMS settings, and real‑world command‑line configurations demonstrated on a 8 GB Linux server.

GC tuningJVMJava performance
0 likes · 7 min read
Master JVM Tuning: Proven Settings to Eliminate Full GC Pauses