Course Description | Outline | IT Home

1. Performance Tuning Foundation
* Topics
* List of Terms
* Load
* Active Load
* Concurrent Load
* Peak Load
* Throughput
* Throughput Curve
* The significance of throughput
* Response time
* Response Time Curve
* Think time
* User Ramp Up
* Saturation
* Response time at system saturation
* Response time past the buckle point
* Interpreting response time trends
* Performance Acceptance Criteria
* Measure your system s steady state
* Path length
* Bottleneck
* Dealing with a bottleneck
* Scaling
* Horizontal and vertical scaling
* Analyze before trying to scale
* Calculating QA User Count
* Accommodating QA User Count
* Scaling Up QA Configuration
* Bottom Up and Top Down
* Bottom Up Testing
* Summary

2. WebSphere Queuing Network
* Topics
* The WebSphere Queuing Network
* Basic Tuning Principle
* Terms
* Open/Closed Queues in WebSphere
* Queue Parameter List
* IBM HTTP Server 6.0/Apache 2.x
* Windows Thread Control
* UNIX Threads and Process Control
* Configuring MaxClients or ThreadsPerChild
* Backlog Queue
* Web Container Transport Chain
* Configure Transport Chain
* TCP Inbound Channel (TCP_2)
* Thread Pool
* Back to TCP Inbound Channel
* HTTP Inbound Channel (HTTP_2)
* EJB Method Call Queue
* Setting the ORB Queue Values
* Data Source Queue
* Prepared statements and caching
* Configuring Data Source
* Configuring Connection Pool Size
* Summary

3. Performance Data Gathering
* Topics
* Problem Determination v.s. Performance Tuning
* What May Affect the WebSphere Performance
* Performance Monitoring and Tuning in WebSphere
* Performance Monitoring Infrastructure (PMI)
* How PMI Works
* PMI Metrics Thread Pools
* PMI Metrics Web Application
* PMI Metrics - Transaction
* PMI Metrics - EJB
* PMI Metrics Data Source
* PMI Metrics Memory Usage
* PMI Metrics HTTP Session
* Monitoring Performance
* JVMPI Monitoring
* JVMPI Metrics
* Tivoli Performance Viewer
* Tasks
* Enable Performance Monitoring
* Enabling JVMPI data reporting
* Launching Tivoli Performance Viewer
* Select Performance Data
* Monitor IBM HTTP Server
* IBM HTTP Server status
* Summary

4. Memory Optimization in Java Virtual Machine
* What is this Chapter About?
* Performance Considerations
* Performance Concerns
* The Heap
* The Heap (cont.)
* Heap Limit
* Default Initial Heap Size
* Heap Top
* Default Maximum Heap Size
* Configure the heap in WebSphere
* Allocation Failure
* Garbage Collection
* Enable verbose garbage collection
* Analyzing Verbose GC - IBM
* Analyzing Verbose GC - Sun
* Thread Local Heap (TLH)
* Memory Tuning Goals
* Effect of Initial Heap Size on GC
* Controlling the GC Timings
* Optimizing GC
* Heap Regions IBM JDK
* Heap Regions Sun JDK
* Solaris Threading Model

5. Profiling Application Performance
* Objectives
* What is Application Profiling?
* Profiling to Improve Method Performance
* Profiling to Detect Memory Problems
* Profiling to Detect Synchronization Bottlenecks
* Profiling with IBM Support Assistant
* Profiling Architecture
* Installing the Profiling Agent
* Enabling Profiling on the Server
* Attaching to the Agent from Health Center
* Using the Health Center
* Health Center Perspectives
* Summary

6. Performance Tuning Techniques
* Topics
* Basic Methodology
* Problem Areas
* CPU utilization
* The components of CPU usage
* Measure CPU utilization everywhere
* Symptoms of underutilization
* What causes underutilization?
* Network capacity problem?
* Synchronization problem?
* Slow external resource?
* Is the test pushing the system hard enough?
* Does your system scale?
* Symptoms of burstiness
* Infrequent synchronization problem?
* Test driver synchronization problem?
* Slow back-end systems?
* Slow garbage collection?
* Timeout problems?
* Erratic network traffic?
* Symptoms of over utilization
* High User CPU
* High System CPU
* High Wait CPU
* Server hanging
* Thread dump in WebSphere v6
* Analyzing a Thread Dump
* Uneven cluster loading
* Load balancer configured correctly?
* Plan of attack
* Tuning the WebSphere Queuing Network
* Tuning Static Content
* Recall: Basic Tuning Principle
* EJB instance cache size
* Disable Web Application Auto Reload
* Enable Pass By Reference
* Relax Transaction Isolation Level
* Optimize Access Intent
* Cache JNDI Objects
* Database Connection Handling
* Prepared Statement Caching
* Tuning the Prepared Statement Cache

7. Troubleshooting
* Objectives
* Problem Determination
* Error Reporting
* Networking Problems and Solutions
* HTTP Request Problems
* HTTP Request Solutions
* Other Solutions
* Tools for Resolving WebSphere Problems
* Admin Console Messages
* Configuration Problems
* Runtime Messages
* Message Details
* Important Log Files
* Configuring JVM Log Files
* Viewing Logs
* Event Types
* Log Detail Levels
* Configuring Tracing
* Log File Format
* Reading Java Exceptions
* Common Exceptions
* Server Does Not Start
* AST
* Importing Log Files Into AST
* Log View of AST
* dumpNameSpace Tool
* Debugging
* IBM Tools
* Troubleshooting Questions
* Troubleshooting Answers
* Reference

8. Network Deployment Architecture
* Objectives
* Workload Management (WLM) Basics
* Role of Network Deployment Software
* Similarities With Base Edition
* Differences With Base Edition
* Coexistence With Base Edition
* Network Deployment Cell
* Deployment Manager and Node Agents
* Configuration File Synchronization
* Synchronization Problems
* WebSphere Profiles - Recap
* Network Deployment Profiles
* Federating Nodes
* Federating an Application Server Profile
* Federating a Custom Profile
* Adding Nodes
* Controlling Deployment Manager and Node Agents
* Automatically Starting Servers
* Types of WLM
* Web Server WLM
* Web Module WLM Architecture
* Weighted Routing
* State Management
* Server Affinity
* Weighted Routing with Server Affinity
* EJB WLM
* References

9. WebSphere High Availability Overview
* Workload Management and Failover in WebSphere
* Server Affinity
* Problems With Server Affinity
* Server Affinity With Failover
* Data Replication Service
* Number of Replicas
* Replication Security
* Enabling Server Affinity Failover
* Session Database
* Session Tuning
* Distributed Session Tuning
* Introduction - HAManager
* HAManager
* HAManager Messaging Service
* HAManager - Functioning
* Core Group
* Core Group Coordinator

10. Dynamic Caching for Web Applications
* Introduction
* Configuring Dynamic Cache
* How Caching Works
* Structure of cachespec.xml
* URL Based Caching
* Session Based Cache
* Cache Priority
* Configuring Cache Manager
* Edge Side Include (ESI) Cache
* Configuring ESI Cache

11. Performance Advisors Overview
* Topics
* Performance Advisors
* Performance Advisors in Tivoli Performance Viewer (TPV)
* Performance & Diagnostic Advisor
* Enabling and Configuring Performance & Diagnostic Advisor
* Performance & Diagnostic Advisor
* Reference

12. IBM Support Assistant
* Objectives
* Source of Errors
* Support Tools
* IBM Support Assistant
* ISA Workbench
* Customizing the Workbench
* ISA Preferences
* Search for Information
* Case Management
* Collecting Information
* Guided Troubleshooting
* Troubleshooting Tools
* Manage Service Requests
* Summary

Appendix A. AIX Monitoring Tools and Tuning
* topas
* Advanced topas Use
* svmon
* Generating svmon Reports
* The monitor Tool
* Network Buffer Tuning
* Network Dropped Packets Resolution
* Network Statistics Report
* TCP/UDP Buffer Tuning
* System Activity Report
* Disk I/O Report
* Reduce IO Bottleneck
* Using filemon
* Using vmstat
* Tuning VMM Policy

Appendix B. Solaris Monitoring and Tuning
* The vmstat Command
* The mpstat Command
* The iostat Command
* The netstat Command
* netstat (cont.)
* Increasing the Connection Backlog
* Minimize Packet Fragmentation
* Reduce Socket Overhead
* Recover from Browser Disconnects
* Kernel Tuning
* Minimize Page Scanning

Appendix C. Linux Monitoring and Tuning
* Monitoring Tools
* The uptime Command
* The top Command
* The iostat Command
* The vmstat Command
* The pmap Command
* Kernel Parameter Tuning
* Increase Maximum File Descriptor Limit
* Network Tuning
* Linux Tuning Tips

Appendix D. Sun Java System Web Server 6.0 Tuning
* Sun Java System Web Server v6.0 - Basic Concepts
* Basic Concepts (cont.)
* Monitoring Using stats-xml
* Monitoring Using perfdump
* Connection Tuning
* Socket Listen Tuning
* Session Thread Tuning
* Keep Alive Tuning
* Static File Cache Tuning
* DNS Lookup Tuning

Appendix E. DB2 Performance Tuning Techniques
* Topics
* Logs
* Separate DB2 log files from the physical database
* Configuration Advisor
* Launch Configuration Advisor
* DB2/Linux communication
* MaxAppls
* MaxAgents
* Buffer Pool Tuning
* Configuring buffpage
* Evaluating the buffer pool size
* Monitoring the database buffer pool
* Query optimization level
* Configuring query optimization level
* Prepared Statement Caching by DB2
* reorgchk
* MinCommit
* Determining the need to change MinCommit
* Guidelines
* Session Affinity
* Session Cache
* Configuring Session Management
* Configuring the Session Database
* Tuning Session Database I/O
* Calculating Average Session Size
* Tuning Session Database I/O DB2 Specific Notes