About This Book

Tuning Enhancements for AIX 5.2

Performance Concepts

Resource Management Overview

Introduction to Multiprocessing

Planning and Implementing for Performance

System Monitoring and Initial Performance Diagnosis

Monitoring and Tuning CPU Use

Monitoring and Tuning Memory Use

File System, Logical Volume, and Disk I/O Performance

Monitoring Disk I/O

Guidelines for Tuning File Systems

Changing File System Attributes that Affect Performance

Changing Logical Volume Attributes That Affect Performance

Physical Volume Considerations

Volume Group Recommendations

Reorganizing Logical Volumes

Reorganizing File Systems

Reorganizing File System Log and Log Logical Volumes

Tuning with vmtune

Using Disk-I/O Pacing

Tuning Logical Volume Striping

Tuning Asynchronous Disk I/O

Tuning Direct I/O

Using Raw Disk I/O

Using sync/fsync Calls

Setting SCSI-Adapter and Disk-Device Queue Limits

Expanding the Configuration

Using RAID

Using SSA

Using Fast Write Cache

Monitoring and Tuning Communications I/O Use

Monitoring and Tuning NFS Use

Monitoring and Tuning Java

Analyzing Performance with the Trace Facility

Using Performance Diagnostic Tool (PDT)

Reporting Performance Problems

Application Tuning

Using POWER4-based Systems

Monitoring and Tuning Partitions

Appendix A. Monitoring and Tuning Commands and Subroutines

Appendix B. Efficient Use of the ld Command

Appendix C. Accessing the Processor Timer

Appendix D. Determining CPU Speed

Appendix E. National Language Support: Locale versus Speed

Appendix F. Summary of Tunable Parameters

Appendix G. Test Case Scenarios

Appendix H. Notices

Index