On 09/29/2010 01:42 PM, Bruce Cran wrote: > On Wed, 29 Sep 2010 08:57:09 +0200 > Bas Smeelen <b.smee...@ose.nl> wrote: > > >> *Cache:* number of clean pages caching data that are available for >> immediate reallocation >> http://www.freebsd.org/cgi/man.cgi?query=top&sektion=1 >> <http://www.freebsd.org/cgi/man.cgi?query=top&sektion=1> >> > I believe the "Cache" value is almost totally unrelated to the > amount of memory used for caching: FreeBSD has a unified buffer cache > so any memory is available for use as cache. Unlike Linux, you can't > look at the line in 'top' to see how much memory is being used for > buffers and cache. > > You can find more information about the VM architecture at > http://www.freebsd.org/doc/en/books/arch-handbook/vm.html . > > The way I understand it: The amount of cached file data pages is included in the Wired value The amount of free cache pages that can immediatly can be re-used for caching is the Cache value The Buf value is the numbder of pages used for BIO-level disk caching I think that the value of Inactive also includes some kind of application data cache So as you also state, unlike linux there is no way of determining the amount of memory used for *all caching* with top
For more info of basic design decisions I think this is a good resource also: http://docs.freebsd.org/44doc/ DISCLAIMER: This e-mail is for the intended recipient(s) only. Access, disclosure, copying, distribution or reliance on any of it by anyone else is prohibited. If you have received it by mistake please let us know by reply and then delete it from your system. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
