Re: FreeBSD config
От | Mark Kirkwood |
---|---|
Тема | Re: FreeBSD config |
Дата | |
Msg-id | 4042F213.7040106@paradise.net.nz обсуждение исходный текст |
Ответ на | Re: FreeBSD config (Dror Matalon <dror@zapatec.com>) |
Список | pgsql-performance |
>I noticed this passage too, but ... > > >>Quoting from http://www.daemonnews.org/200001/freebsd_vm.html : >> >><snip>* >>When To Free a Page* >> >>Since the VM system uses all available memory for disk caching, there >> >> > ^^^^^^^^^^^^^ > >The VM system, as you can see from the article, is focused on paging and >caching the programs and program data. Is the cache for disk reads and >writes thrown into the mix as well? > > > Yes - that is the real question. The following link : http://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handbook/vm-cache.html and the few "next" pages afterward talk about a unified buffer cache i.e file buffer cache is part of the KVM system which is part of the VM system - but this does not seem to preclude those vfs.*buf* variables limiting the size of the file buffer cache... hmm ... so no real decrease of confusion at this end.. :-) Mark
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