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Contents
Send Us Your Comments.................................................................................................................. vii
Preface............................................................................................................................................................ ix
1 Performance Overview
Performance Terms............................................................................................................................. 1-2
What is Performance Tuning? .......................................................................................................... 1-2
Response Time.............................................................................................................................. 1-3
System Throughput...................................................................................................................... 1-4
Wait Time....................................................................................................................................... 1-4
Critical Resources......................................................................................................................... 1-5
Effects of Excessive Demand....................................................................................................... 1-6
Adjustments to Relieve Problems.............................................................................................. 1-6
Setting Performance Targets............................................................................................................. 1-7
Setting User Expectations.................................................................................................................. 1-7
Evaluating Performance .................................................................................................................... 1-7
Performance Methodology ............................................................................................................... 1-8
Factors in Improving Performance............................................................................................ 1-9
Architecture........................................................................................................................................ 1-10
2 Monitoring Your Web Server
Monitoring Processor Use................................................................................................................. 2-2
Using the sar Utility (AIX, HP-UX, Intel Solaris)..................................................................... 2-2
Using the top Utility..................................................................................................................... 2-3
- Application Server 1
- Contents 3
- 3 Sizing and Configuration 4
- Send Us Your Comments 7
- Audience 9
- Assumptions 9
- Conventions 9
- Oracle Services and Support 10
- Product and Documentation 11
- Customer Service 11
- Education and Training 11
- Oracle Technology Network 11
- Performance Overview 13
- Performance Terms 14
- What is Performance Tuning? 14
- Response Time 15
- System Throughput 16
- Wait Time 16
- Critical Resources 17
- Effects of Excessive Demand 18
- Setting Performance Targets 19
- Setting User Expectations 19
- Evaluating Performance 19
- Performance Methodology 20
- Architecture 22
- Monitoring Your Web Server 23
- Monitoring Processor Use 24
- Monitoring the Web Server 25
- Using the mod_status Utility 26
- Figure 2–1 Server status page 27
- Monitoring JServ Processes 30
- Sizing and Configuration 33
- Determining CPU Requirements 35
- JServ Memory Requirements 36
- Determining Java Heap Size 36
- Sizing and Configuration 3-5 37
- Component JDK 1.1.8 JDK 1.2 37
- Servlet 10MB 24MB 37
- OracleJSP page 10MB 32MB 37
- Number of JServ Processes 38
- Sizing and Configuration 3-7 39
- TCP Tuning 42
- Linux Tunables 44
- Tuning at Compile Time 45
- Setting TCP parameters 46
- MaxClients 49
- SSL Session Caching 50
- Impact of Logging 50
- HTTP/1.1 51
- Shorter Response Times 52
- Reduction in Server Workload 53
- FIN_WAIT_2 53
- Apache Versions 54
- Optimizing Apache JServ 55
- JServ Overview 56
- Loading Servlet Classes 57
- Pre-Loading with JSPs 57
- Automatic Class Reloading 57
- Load Balancing 58
- Optimizing Apache JServ 5-7 61
- What is OracleJSP? 62
- Developer Mode 63
- Buffering 63
- Caching database connections 63
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