/CACHE:xxx
parameter in the
HPFS.IFS command line.
According to IBM's documentation, the maximum cache size for HPFS drives is 2048 KB, which is not a whole lot.
You may request that OS/2 automatically determine the cache size. In most cases, this will then result in about 10% of the installed memory, but I don't recommend using this setting.
See "File-system caches" for an introduction to file-system caches in general.
The setting "Cache item threshold" determines (in KB) the
maximum size of objects that will be saved in the caches. This
corresponds to the
/CRECL:xxx
parameter in the HPFS.IFS command line.
This setting is supposed to prevent large files which are usually only loaded once from
clearing the whole cache.
However, I think that the default value of 4 KB is way too low. You can safely specify
32 KB or even the maximum of 64 KB here.