Customizing Fast Response Cache Accelerator logging

The fast response cache accelerator (FRCA) can improve the performance of the IBM® HTTP Server when serving static content, such as text and image files. By default, FRCA generates an access log of all requests that are served out of the cache. In order to minimize the effect of logging on performance, this is a separate file from the normal Apache access log.

Before you begin

The use of FRCA is discouraged, as it was deprecated starting in WebSphere® Application Server Version 7.0. FRCA might be removed in a future release. This release has no AFPA directives in the default configuration file.

Read about deprecated features in the Deprecated features topic.

Read the Fast Response Cache Accelerator operational restrictions topic for information on restrictions and limitations.

About this task

When FRCA is enabled, the default configuration setting allows all static files to be cached. The cache automatically loads during server operation so that individual files do not need to be listed. Use the AfpaCache directive to turn caching on or off for specific directories.

FRCA will remove files from the cache when they change to avoid serving stale content.

Enable the FRCA access log if you want to maintain a record of requests served by FRCA. Requests that are not served out of the cache will be logged in the FRCA access log file. The FRCA access log file provides a useful way to verify that caching is enabled and to identify cached files.

Note: Even though a particular file might be cached, it might not always be served from the cache. Therefore, not every request for a cached file will result in an FRCA access log entry.

If you do not need access logging, turn the logging off for better performance.

Procedure

Task topic    

Terms and conditions for product documentation | Feedback

Last updated: January 28, 2018 08:56 PM GMT-06:00
http://www14.software.ibm.com/webapp/wsbroker/redirect?version=phil&product=ihs-dist&topic=cihs_cacustom
File name: cihs_cacustom.html