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Hodnocené. / 5. Na základě hodnocení zákazníků
JServ Overview
5-2 Oracle HTTP Server powered by Apache Performance Guide
JServ Overview
Apache JServ is made up of an Apache module called mod_jserv, which runs in the
httpd process, and a servlet engine, which runs in a Java process. mod_jserv, which
is implemented in C, functions as a dispatcher, routing each servlet request to a
JServ process for execution.
The servlet engine runs in its own JVM and is solely responsible for parsing the
request and generating a response. As Figure 5–1 shows, multiple JServs can service
requests. The HTTP server process and the JServ process communicate using the
Apache JServ Protocol 1.2.
Figure 5–1 Apache JServ components
- 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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