Ivan Voras wrote:
On 16/11/2007, Laszlo Nagy <[EMAIL PROTECTED]> wrote:
Ivan Voras wrote:


http://www.freebsd.org/doc/en_US.ISO8859-1/books/arch-handbook/vm-fileio.html

I read this too but I don't understand. Too difficult for me.

So what is the answer? Do I need to set a sysctl or will FreeBSD use all
available free memory for caching file data from disk?

You don't need to change anything, it's the default state.

So as long as the memory isn't shown as "Free" in top, any memory that isn't being used by the kernel or by applications is being used for cache/buffer? One reason why I had thought that FreeBSD didn't use all the memory for caching disk accesses was because I saw a different behaviour when decompressing large archives between Linux and FreeBSD: in Linux there's a massive burst of activity as the archive gets put straight into memory; then, once memory starts getting full it pauses for what seems a very long time as it flushes all the data to disk. FreeBSD doesn't seem to do that; it seems a lot smoother in that it writes to the disk a lot more regularly - is this likely to be because Linux has a higher limit on the number of dirty pages it can have in memory before it writes them out to disk?

--
Bruce
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