JAVA Performance Tuning and Troubleshooting

Course Introduction

The "JAVA Performance Tuning and Troubleshooting" course is a program where you learn how to run Java applications more efficiently and effectively resolve performance issues that may arise. This course focuses on resource management problems, processing speed degradation, and unexpected errors frequently encountered in actual project environments, covering solution strategies that can be immediately applied in practice.

Course Objectives

📌 When performance tuning is needed

1. When system response speed becomes slow

   • Page loading delays, cases where API responses take several seconds or more

   • When perceived performance drops drastically during specific feature execution

     
     

2. When traffic surges

   • When simultaneous users surge due to events, promotions, service launches, etc.

   • When there is a risk of failure due to increased load compared to existing infrastructure

3. When resource usage is inefficient

   • CPU usage is consistently high, or memory usage is abnormally increasing

   • Frequent Stop-the-world time due to GC (Garbage Collection)

4. When processing large-scale data

   • When processing speed becomes excessively slow in batch processing, large-scale data analysis, etc.

   • When the entire operation is delayed due to I/O bottlenecks

📌 When troubleshooting is needed

1. When an unexpected service outage occurs

   • OutOfMemoryError occurs due to memory leak

   • Threads stopped due to Deadlock

2. When errors or exceptions become frequent

   • When the same error is repeatedly recorded in the log

   • Continuous exceptions occurring only in specific features after deployment

Curriculum Overview

1. Course Introduction

This course is designed for developers who use Java, performance engineers, system operators, and others interested in practical performance optimization and problem-solving.
Along with theory, we provide hands-on practice examples to systematically learn not just "why" but "how" to improve performance.

2. Java Resource Performance Tuning

• Memory Usage Optimization (Heap, Stack, GC Optimization Techniques)

• Strategies for Minimizing Unnecessary Object Creation

• Connection Resource Management

• CPU Usage Analysis and Efficient Allocation Methods

  
  

In this part, you will learn techniques for maximizing the efficient utilization of system resources and methods for early detection of resource bottlenecks.

3. Java Processing Speed Performance Tuning

• Algorithm and Data Structure Selection Optimization

• Utilizing Multithreading/Parallel Processing Techniques

• Applying Caching Strategies

This course includes not only code optimization, but also speed improvement strategies at the system architecture level.

4. Java Troubleshooting Methods

• Log Analysis for Problem Root Cause Identification

• JDK Tools (JVisualVM) Utilization

• Memory leaks, thread deadlocks, GC problem solving

• Exception Handling and Recurrence Prevention Strategies

  
  

  

Recommended for these people

• Java developers who want to improve service speed and stability

• Engineers who frequently experience performance issues in production systems

• Project managers responsible for large-scale traffic handling and optimization

• Developers who want to resolve issues like memory leaks, GC delays, and deadlocks

• QA/Operations personnel who want to develop performance monitoring and analysis capabilities

Areas where you can grow after taking the course

• Improving Performance Issue Diagnosis Skills

  
  

• Acquiring Efficient Resource Management Skills

  
  

• Strengthening Code and Architecture Optimization Capabilities

  
  

• Improved problem-solving speed and stability

  
  

• Securing Preventive Capabilities

  
  

• Maximizing Practical Application Potential