This course focuses on the development aspects that affect the performance of a WebSphere v5 application. After taking the course, students will be able to write code that is free of any obvious performance problem. They will gain an understanding of the low level memory management mechanisms of JVM. They will also learn to use the profiling tools to inspect the memory usage of an application

WebSphere Training Course duration

3 Days

WebSphere Training Course outline

1. Chapter 1 - Standardized terminology
• Load
  • Concurrent load
  • Active load
  
  
• Throughput
  • Pages per second.
  • Transactions per second.
  
  
• Response time
• Path length
• Bottleneck
• Scaling


2. Chapter 2 - JVM Memory Management Fundamentals
• Memory management by the operating system
  • Virtual memory
  • The page space
  • The page in and page out process.
  
  
• IBM JDK 1.3 memory management details.
  • Heap allocation
  • Thread local storage
  • Garbage collection mechanism
  • Compaction
  • Tuning parameters.
  • Lab: Interpret verbosegc output
  
  
• Sun JDK memory management details.
  • Heap allocation
  • Garbage collection mechanism
  • Compaction
  • Tuning parameters.
  • Lab: Interpret verbosegc output
  
  
• Coding practices for better memory related performance
  • Shallow inheritance
  • Short class path
  • Minimize hidden objects
  • Just In Time object creation.
  • Rlease objects immediately
  • Reuse objects
  • More...
  • Lab: Optimize Java code for memory usage.
  
  


3. Chapter 3 - Profiling
• Profiling from WSAD
  • Setup the environment
  • Detecting memory leaks
  • Detecting slow classes
  • Detecting excessive object creation
  • Lab: Detect memory leak and excessive object creation.
  
  
• Profiling from JProbe
  • Setup the environment
  • Detecting memory leaks
  • Detecting slow classes
  • Detecting excessive object creation
  • Lab: Detect memory leak and excessive object creation.
  
  


4. Chapter 4 - Impact of Java Language Construts
• Exceptions
• Type casting
• Assertion
• Comparative performance of stack, member and static variables.
• Tuning loops
• Recursion
• Collections
  • Advantages of JDK1.3 colelction classes
  • Presetting sizes
  • Efficient HashMap traversal
  • Sorting
  • Lab: Efficient use of Java collections.
  
  
• Using a logging framework
  • Log4J
  • JRAS
  • Optimize logging.
  • Lab: Using Log4J
  • Lab: Using JRAS
  
  


5. Chapter 5 - Database Coding Practices
• Using a Data Source.
• Proper way of closing JDBC resources.
• Use transactions to wrap database activity
  • JDBC transaction
  • Session EJB facade
  • Client controled EJB transaction
  
  
• Lab: Using Data Source and JDBC transaction.
• Using prepared statement
  • Security
  • Performance
  • WebSphere's statement pooling
  • Lab: Using Prepared Statements.
  
  
• Handling stale connection exception
  • Lab: Handling stale connection exception.
  
  
• Avoid Two Phase Commit


6. Chapter 6 - Servlet and JSP
• Making Servlets multi-thread aware
  • Avoid thread serialization.
  • How does WebSphere treat single threaded model.
  • Lab: Fix multi-thread incompatibility in a Servlet.
  
  
• Using the init method.
• How to cache data and JNDI objects.
  • Lab: Cache JNDI objects from the init method.
  
  
• Avoid Servlet logging
• Disable session in JSP
• Minimize JSP output size.
• Disable auto class reload.


7. Chapter 7 - Session Management
• Session persistence in WebSphere
  • Why we need session persistence?
  • Database persistence
  • Memory to memory replication
  
  
• Minimize session usage
  • Discuss alternate techniques
    • Cookie
    • Hidden variable
    • Relational table
    
    
  • Lab: Modify session management code to use relational table.
  • Lab: Modify session management code to use hidden variables.
  
  
• Implement java.io.Serializable
• Eliminate circular dependency


8. Chapter 8 - EJB
• Local interfaces
  • Lab: Creating an EJB that supports the local interface.
  
  
• How to cache data and JNDI objects.
  • Lab: Caching JNDI objects.
  
  
• Understand WebSphere's object pooling
• Minimize system exception
• Enable pass by reference
• Session facade
• Access beans
• CMP EJB access intent
• Transaction isolation level
• Avoid stateful session bean
• CMP EJB caching
  • Lab: Enable CMP data caching.
  
  


9. Chapter 9 - WSAD Tuning
• Memory settings
• Closing projects
• Disable autobuild
• Disable verification
• More...
• Lab: Tune WSAD.