1. Performance Tuning Foundation
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- 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
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2. WebSphere Queuing Network
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- Topics
- The WebSphere Queuing Network
- Basic Tuning Principle
- Terms
- Open/Closed Queues in WebSphere
- Queue Parameter List
- IBM HTTP Server 7.0/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
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3. Performance Data Gathering
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- Topics
- Problem Determination vs. 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
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4. Memory Optimization in Java Virtual Machine
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- 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
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5. Profiling Application Performance
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- 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
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6. Performance Tuning Techniques
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- 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
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7. Troubleshooting
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- 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
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8. Network Deployment Architecture
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- 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
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9. WebSphere High Availability Overview
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- 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
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10. Dynamic Caching for Web Applications
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- 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
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11. Performance Advisors Overview
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- Topics
- Performance Advisors
- Performance Advisors in Tivoli Performance Viewer (TPV)
- Performance & Diagnostic Advisor
- Enabling and Configuring Performance & Diagnostic Advisor
- Performance & Diagnostic Advisor
- Reference
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12. IBM Support Assistant
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- 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
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