Does anyone know if setting the cache option in Fsys to zero results in no
cache being used or if it reverts to the default. I’m talking about setting
the -c option to 0m or 0k. TIA
Ivan Bannon
RJG Inc.
Ivan Bannon wrote:
Does anyone know if setting the cache option in Fsys to zero results in no
cache being used or if it reverts to the default. I’m talking about setting
the -c option to 0m or 0k. TIA
It will never use “no cache”, there must always be some in-memory
buffers in which to read the disk sectors prior to message reply to
client. It will be a minimum of 8k per thread/coroutine (’-t’,
default 4), thus 32 kB of buffer cache is minimum. However, file
system performance will degrade quite markedly there (very little
caching or room for read-ahead/write-behind blocks) although you
may not necessarily need the 1/8th default either.