disk cache tuning
Eugene L. Vorokov
vorokov at gmail.com
Fri Jun 17 21:43:58 GMT 2005
I have a box with FreeBSD 5.4, where disk subsystem is a bottleneck.
It runs several applications which access huge number of files, usually small.
They do not require a lot of memory, network I/O is also not very intensive.
I have read tuning(7), enabled softupdates, noatime and such. But I have an
impression that most of the memory (1Gb) is not really used, while it could be
used for disk cache. top(1) reports about 800Mb as inactive, and
of information from disk still causes a lot of disk activity.
How can I increase the amount of memory used for disk cache without touching
other subsystems ? As far as I understand, simply increasing MAXUSERS is not
a good idea, because it will also increase NMBCLUSTERS and such, which I do
not really want.
Please Cc: me as I'm not on this list.
More information about the freebsd-questions