There are special considerations when using FRCA on AIX® platforms.
The FRCA kernel extension must load before starting IBM® HTTP Server with FRCA enabled. Also,
increasing the upper-bound limit of the percentage of CPU time that the FRCA
kernel extension can spend in the interrupt (high priority) context is not
recommended.
The following items must be considered when you use fast response cache
accelerator (FRCA) on AIX platforms:
- The FRCA kernel extension must load before starting IBM HTTP server
with FRCA enabled. To do this, issue the frcactrl load command. This
is normally configured to run whenever the system boots and before IBM HTTP Server
starts. See the AIX man
pages for more details about the frcactrl command.
- In order to place an upper bound on the percentage of CPU time that the
FRCA kernel extension can spend in its interrupt (high priority) context,
use the frcactrl pctonintr command. Increasing this above the default
value of 80% is not recommended in order to allow other applications a reasonable
amount of time to execute. Decrease this value if more time needs to be allocated
to other applications, but note that reducing the value will result in more
cache misses, even if a file is in the cache.