WA1094 WebSphere v5.1 Performance Tuning Tools and Methodology Workshop Training and Courseware Course Outline

WA1094 WebSphere v5.1 Performance Tools and Methodology Workshop Training and Courseware Course Outline

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

WA1094 WebSphere v5.1 Performance Tools and Methodology Workshop Training and Courseware Course Outline

1. Foundation

2. WebSphere Queuing Network

3. Performance Data Gathering

4. Monitoring Memory and the CPU

5. AIX Monitoring Tools and Tuning

6. Performance Tuning Techniques

7. WebSphere Problem Determination

8. Problem Determination Techniques

9. WebSphere Best Practices

Appendix A. Sun ONE Web Server 6.0 Tuning

Appendix B. Solaris Monitoring and Tuning

Appendix C. Linux Monitoring and Tuning

Appendix D. Monitoring memory and the CPU with JProbe