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 Oracle Web Cache in OAS 10g

 

 

1. What is the OracleAS Web Cache ?

2. How Web Caching Work ?

3. Which is the Oracle Web Cache Directory Structure ?

4. Which is the default port for OracleAS Web Cache listener ?

5. Is OracleAS Web Cache certified with Oracle E-Business Suite 11i& R12 ?

6. How does one stop and start the Web Cache?

1. What is the OracleAS Web Cache ?

 

The Oracle Web Cache is a powerful tool that can be used to significantly reduce the load on both the application server and the backend database.   Oracle testing showed that placing Web Cache in front of the application server can reduce the back-end database load by 85%.   However, it is important to configure Web Cache and you application/database properly.

 

 

2. How Web Caching Work ?

 

The steps for browser interaction with Oracle Web Cache follow: 

  • A browser sends a request to a Web site named www.organization.com. 

  • This request in turn generates a request to Domain Name System (DNS) for the IP address of for the Web site. 

  • DNS returns the IP address of Oracle Web Cache, that is, 144.25.190.240. 

  • The browser sends the request for the Web page to Oracle Web Cache, 144.25.190.240. 

  • If the requested content is in its cache, Oracle Web Cache sends the content directly to the browser. This is called a cache hit. 

  • If Oracle Web Cache does not have the requested content or the content is stale or invalid, it hands the request off to the application Web server. This is called a cache miss. 

  • The application Web server sends the content through Oracle Web Cache. 

  • Oracle Web Cache sends the content to the client and makes a copy of the page in cache. 

 

3. Which is the Oracle Web Cache Directory Structure ?

 
Directory/File  Contents 

/bin directory on UNIX 

\bin in the ORACLE_HOME directory on Windows 

Contains the Oracle Web Cache binaries, including the webcached main executable and the webcachectl command-line tool. On UNIX, webcachectl is symbolically linked to the $ORACLE_HOME/bin directory, which is set in the path during installation. 

/docs directory on UNIX 

\docs directory on Windows 

Contains documentation and online help for Oracle Web Cache Manager 

/examples directory on UNIX 

\examples directory on Windows 

Contains unsupported Oracle Web Cache scripts for invalidation and personalized attributes and system administration scripts for debugging. Read readme.examples.html in the directory for further information about the scripts. 

internal.xml and internal_admin.xml files  

Contains internal configuration settings 

/lib directory on UNIX 

Contains library files 

/invalidation directory on UNIX 

\invalidation directory on Windows 

Contains the Document Type Definition (DTD) file WCSinvalidation.dtd for invalidation requests and responses 

/logs directory on UNIX 

\logs directory on Windows 

Contains event and access logs 

/mesg directory on UNIX 

\mesg directory on Windows 

Contains message files 

readme.html 

Contains important release information 

/utl directory on UNIX 

\utl directory on Windows 

Contains a utility to convert release 1.0 configuration files to a format supported by release 2.0 

webcache.xml 

Contains configuration parameters set by Oracle Web Cache Manager 

4. Which is the default port for OracleAS Web Cache listener ?

 

The default port OracleAS Web Cache listen for HTTP requests is 7777.

 

 

5. Is OracleAS Web Cache certified with Oracle E-Business Suite 11i& R12 ?

 

Oracle Web Cache 10g (10.1.2.2) is certified with E-Business Suite Release 11i and 12. E-Business Suite administrators may use the latest version of Oracle Web Cache 10.1.2.2 to provide caching, reverse-proxy, and failover and surge protection for their environments.

 

 

6. How does one stop and start the Web Cache?

 

$ webcachectl stop

$ webcachectl start

 

 

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