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Home > Training > WebSphere Application Server 5 administration > WebSphere v5.1 Performance Tuning Tools & Methodology Workshop Training

WebSphere v5.1 Performance Tuning Tools & Methodology Workshop Training

Course#: WA1094

This course provides in depth information on how to tune WebSphere, database server, web server and the operating system to extract the last drop of performance. It covers performance tuning methodology, how to detect a bottleneck and common problems and solutions. After taking this class, students will be able to methodically create a stress testing plan and find bottlenecks and resolve them.

The students will perform hands on lab to create test scripts, perform stress test and gather key performance numbers. The class is generic as far as the stress testing tool is concerned. The concepts learned in this class can be used with any tool of choice.

Topics
 
  • Standardized terminionology.
  • Stress testing and tuning methodology.
  • Gathering key performance numbers using various tools.
  • Common WebSphere bottlenecks.
  • OS (AIX/Solaris) tuning tips
  • DB2 tuning tips
  • WebSphere best practices
  • Problem determination techniques
What you will learn
  After completing this course, the student should be able to:
  • Understand the performance testing methodology
    • How to standardize the terminology for better communication.
    • How to methodically stress test and discover bottlenecks.
    • How to measure if a system will meet performance expectations.
  • Identify potential bottlenecks in WebSphere® applications
  • Analyze application performance with Websphere performance tools
  • Create test cases
  • Improve application databases configurations for optimal performance
  • Know how to monitor applications after deployment
Audience
  QA team members, developers, architects, consultants and IT specialists.
Prerequisites
  Good experience with WebSphere application development and/or QA. Some WebSphere admin introductory knowledge required
Duration
  Three days.

Outline of WA1094 WebSphere v5.1 Performance Tuning Tools & Methodology Workshop Training

1. Foundation

 
  • Objectives
  • 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
  • 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
 

2. WebSphere Queuing Network

 
  • Topics
  • The WebSphere Queuing Network
  • Basic Tuning Principle
  • Terms
  • Open/Closed Queues in WebSphere
  • Queue Parameter List
  • IBM HTTP Server
  • Configuring MaxClients or ThreadsPerChild
  • UNIX Process Control
  • Backlog Queue
  • Keep Alive Settings
  • Web Container Queue
  • Web Container Thread
  • Configure the Web Container Thread Pool
  • HTTP Transport Properties
  • HTTP Transport Prpoerties (cont.)
  • Configuring HTTP Transport Properties
  • Example: Configuring MaxKeepAliveConnections
  • Taking Advantage of Backlog
  • 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

 
  • Performance Monitoring and Tuning in WebSphere
  • Performance Monitoring Infrastructure (PMI)
  • How PMI Works
  • PMI Performance Data
  • 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
  • Rating the Impact of Performance Monitoring
  • JVMPI Monitoring
  • JVMPI Metrics
  • Tivoli Performance Viewer
  • Tasks
  • Enable Performance Monitoring
  • Enabling JVMPI data reporting
  • Launching Tivoli Performance Viewer
  • Please Note…
  • One More Thing…
  • When Security is Enabled
  • Configure Monitoring Settings
  • Setting the Instrumentation Level
  • Viewing Performance Data
  • Viewing Performance Chart
  • Start Logging Data
  • Specify Log File
  • Storing and Replaying Data from a Log File
  • Changing Display Options
  • The PMI Servlet
  • The PMI Servlet (cont…)
  • Metric Tags
  • Monitor IBM HTTP Server
  • Monitor IBM HTTP Server…
  • IBM HTTP Server status
 

4. Monitoring Memory and the CPU

 
  • 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
  • Heap Regions – IBM JDK
  • Heap Regions – Sun JDK
  • 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
  • Solaris Threading Model
  • WebSphere Profiling Architecture
  • Architecture
  • Tasks
  • Install the IBM Agent Controller - Windows
  • Install the IBM Agent Controller - UNIX
  • Start the IBM Agent Controller
  • Enable profiling on the application server
  • Begin Profiling
  • Attach a monitor to a JVM
  • Class Filter Option
  • Profile Type Option
  • Start monitoring
  • Detecting Memory Leak
  • Class Statistics
  • Detecting Heavy CPU Usage
  • End to End Call Chain Analysis
  • Execution Table
  • Refresh Views
  • Save performance data
  • Stop Profiling
 

5. AIX Monitoring Tools and Tuning

 
  • AIX Work Load Management
  • Work Load Management
  • WLM Classes
  • Predefined Classes
  • Resource Metrics
  • Share Value of a Resource
  • Classification Attributes
  • Other Class Attributes
  • Basic WLM Administration
  • Basic Administration
  • WLM Monitoring Tools
  • 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
 

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 v5
  • 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
  • Prepared Statement Caching by DB2
  • Overview
  • 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
  • reorgchk
  • MinCommit
  • Determining the need to change MinCommit
  • Guide Lines
  • Session Affinity
  • Session Cache
  • Configuring Session Management
  • Tuning Session Database I/O
  • Configuring the Session Database
  • Calculating Average Session Size
  • Tuning Session Database I/O – DB2 Specific Note
 

7. WebSphere Problem Determination

 
  • Topics
  • Resources for Problem Determination
  • Access Log
  • Error Log
  • Start Up Error
  • The JRAS Toolkit
  • JRAS Log Types
  • Common Log Format
  • Example WebSphere Log Using JRAS
  • Understanding Java Stack Trace
  • Application Server Logs
  • Configure JVM Logs
  • Configure JVM Logs (cont…)
  • Service Logs
  • Configuring Activity Log
  • Native Log
  • Configuring Native Logs
  • Web Server Plug-in Log
  • WebSphere Log Files
  • Server Log Files
  • Can’t Keep Them Straight?
  • Application Tracing
  • Application Tracing…
  • Diagnostic Trace Options
  • Trace Specification
  • Trace Specification String
  • Runtime Trace Options
  • Tools for Tuning and Troubleshooting
  • Tools for Tuning and Troubleshooting…
  • Collector * Running Collector
  • First Failure Data Capture (FFDC)
  • dumpNameSpace
  • HTTP Sessions Tracker Servlet
  • IBMTrackerDebug Output
  • Installation Information
  • Java Stack Dump
  • Thread Analyzer
  • Viewing Transactions
  • Log Analyzer
  • Launching Log Analyzer
  • Use Log Analyzer
  • Log Analyzer Interface
  • Preferences
  • Log Type and Sorting
  • Adjust Log Analyzer Settings – Set Log Record Format
  • UOW Format
  • Activity Record Format
  • Merge Logs
  • Merge Logs…
  • Update Symptom Database
  • Overview
  • Debugging Service
  • WebSphere Studio
  • Summary
 

8. Problem Determination Techniques

 
  • Steps to Follow
  • WebSphere specific Notes
  • Problem With Installation
  • Server Does Not Start
  • 404 File Not Found
  • 500 Internal Server Error
  • Cannot Find Server or DNS Error
  • Virtual Host Not Found
  • JSP Compilation Problem
  • Class Not Found Error
  • JNDI Name Not Found
  • High CPU Usage
  • Application Server Hanging
 

9. WebSphere Best Practices

 
  • Best Practices
 

Appendix A. Sun ONE Web Server 6.0 Tuning

 
  • iPlanet v6.0 - Basic Concepts
  • Basic Concepts (cont.)
  • Monitoring Using stats-xml
  • Monitoring Using perfdump
  • Connection Tuning
  • Connection Tuning (cont.)
  • Socket Listen Tuning
  • Session Thread Tuning
  • Keep Alive Tuning
  • Static File Cache Tuning
  • DNS Lookup Tuning
 

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
  • Increase Maximum File Descriptor Limit…
  • Network Tuning
  • Network Tuning…
  • Linux Tuning Tips
  • Linux Tuning Tips…
 

Appendix D. Monitoring memory and the CPU with JProbe

 
  • What is JProbe Suite?
  • What JProbe provides
  • Tasks
  • Create JProbe Memory Debugger session settings
  • Start monitoring
  • Runtime Heap Summary
  • Instance Summary
  • Controls
  • Controls…
  • Request garbage collection
  • Checkpoint
  • Setting a checkpoint
  • “Change” values
  • What is a Use Case?
  • How a Use Case works
  • Execute a Use Case
  • Memory Debugger creates a snapshot
  • Analyze a snapshot
  • Class View
  • Instance Detail View
  • Referrers and References
  • Reference Graph View
  • Complex Reference Graph View
  • Leak Doctor
  • Launch the Leak Doctor
  • Leak Doctor’s analysis
  • Remove a reference
  • JProbe Threadalyzer
  • Configuring Threadalyzer
  • Running a Test
  • Threadalyzer Browser
  • Data Collection Options
  • JProbe Profiler
  • Configuring the Profiler
  • Running a Profiling Session
  • Analyzing Statistics
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