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Operating Systems: AIX, Windows
These configuration parameters control the Advanced Fast Path Architecture
(AFPA) feature in IHS.
The fast response cache accelerator (FRCA) utilizes a special high-performance
component, based on the IBM Advanced Fast Path Architecture, from which the AFPA
prefix is derived. You can configure FRCA for IPV4. IPV6 is not supported.
AfpaBindLogger directive AIX:
Use
the AfpaBindLogger directive to bind the fast response cache accelerator (FRCA)
logging thread in the kernel to a specific processor.
The format of
the command is AfpaBindLogger [-1, 0, 1, ..., n], where -1 leaves the logging
thread unbound and a number from 0 to total number of processors on the system,
binds the logging thread to that processor.
| Syntax
| AfpaBindLogger [-1,0,1,..,n]
|
| Scope
| One per physical Apache server
|
| Default
| (-1)
|
| Notes
| Valid on AIX operating systems only.
|
AfpaCache directive AIX: Windows:
The
AfpaCache directive turns the fast response cache accelerator (FRCA) on or
off for a particular scope (such as a directory). The AfpaCache directive
applies to all descendants in a scope, unless otherwise modified by another
directive.
| Scope
| Server configuration, virtual host,
|
| Syntax
| On or off
|
| Usage
| AfpaCache on
|
| Override
| Options
|
| Multiple instances in the configuration file
| Allowed
|
| Notes
| Valid on Windows 32-bit and AIX operating systems.
|
AfpaDynacacheMax directive Windows:
The
AfpaDynacacheMax directive is used on Windows operating systems to control
the total amount of memory utilized for caching servlets and JavaServer Pages
files.
When static files are cached, there is very little overhead
for each entry since the file itself does not take up space in the cache,
just the file handle. However, for servlets and JavaServer Pages files, the
body of the response is stored in physical memory, so care must be taken to
avoid consuming all available memory. Without this directive, the fast response
cache accelerator will automatically set the upper bound to be approximately
one eighth of physical memory. Use the directive to override that default.
| Syntax
| AfpaDynacacheMax size (Megabytes)
|
| Scope
| One per physical Apache server
|
| Notes
| Valid on Windows 32-bit operating systems
|
AfpaEnable directive AIX: Windows:
The
AfpaEnable directive enables the fast response cache accelerator (FRCA). If
the AfpaEnable directive is present and mod_afpa_cache.so is loaded, FRCA
listens on the port specified by the AfpaPort directive.
| Syntax
| AfpaEnable
|
| Scope
| One per physical Apache server
|
| Notes
| Valid on AIX and Windows operating systems.
|
AfpaLogFile directive AIX: Windows:
The
AfpaLogFile directive defines the fast response cache accelerator (FRCA) log
file name, location, and logging format.
| Scope
| One per physical Apache server
|
| Syntax
| AfpaLogFile log_file_name [CLF | ECLF | V-CLF | V-ECLF| BINARY]
|
| Notes
| Valid on AIX and Windows 32-bit operating systems. On Windows 32-bit
operating systems, the current date is used as the file type for the log file,
and the log file is automatically rolled over at midnight each day.
|
The log formats are as follows:
- CLF = Common Log Format
- ECLF = Extended Common Log Format
- V-CLF = Common Log Format with virtual host information
- V-ECLF = Extended Common Log Format with virtual host information
- AIX: BINARY = Binary log with virtual host information
AfpaLogging directive AIX:
The
AfpaLogging directive turns the fast response cache accelerator (FRCA) logging
on or off.
| Scope
| One per physical Apache server
|
| Syntax
| AfpaLogging On | Off
|
| Notes
| Valid only on AIX operating systems.
|
AfpaMaxCache directive AIX:
The
AfpaMaxCache directive specifies the maximum file size inserted into the fast
response cache accelerator (FRCA) cache.
| Syntax
| AfpaMaxCache [size (bytes)]
|
| Scope
| One per physical Apache server
|
| Default
| none
|
| Notes
| Valid only on AIX operating systems.
|
AfpaMinCache directive AIX:
The
AfpaMinCache directive specifies the minimum file size inserted into the fast
response cache accelerator (FRCA) cache.
| Syntax
| AfpaMinCache [size]
|
| Scope
| One per physical Apache server
|
| Default
| none
|
| Notes
| Valid only on AIX operating systems.
|
AfpaPort directive AIX: Windows:
The
AfpaPort directive tells the FRCA on which TCP port to listen. The AfpaPort
directive issues a listen command for all TCP network adapters that are active
on the server machine. The listen command is effective for all TCP addresses.
| Syntax
| AfpaPort port number
|
| Scope
| One directive per server
|
| Notes
| Valid only on AIX and Windows 32-bit operating systems
|
AfpaRevalidationTimeout
directive AIX:
The AfpaRevalidationTimeout directive sets the time interval
for revalidation of a cached object. When the RevalidationTimeout is exceeded
for a cached object, a fresh copy is cached.
| Syntax
| AfpaRevalidationTimeout [value]
|
| Scope
| Global
|
| Default
| 60 seconds
|
| Notes
| Valid on AIX operating systems only.
|
AfpaSendServerHeader AIX:
The
AfpaSendServerHeader directive specifies whether or not the fast response
cache accelerator (FRCA) sends the HTTP Server header in the response.
| Syntax
| AfpaSendServerHeader true or false
|
| Scope
| One per physical Apache server
|
| Default
| true
|
| Notes
| Valid only on AIX operating systems.
|
Related tasks
Serving static content faster with Fast Response Cache Accelerator