Jon Radel wrote:
herbert langhans wrote:
recently I had to add some more RAM on a workstation. Was 512MB before and is
2GB now, the reason was to give some graphic apps more space.
But to my surprise the workstation ran faster--but before adding RAM it did NOT
make use of the swap-partition and after the big RAM chip of course not too
(checked it with #top).
This was a Slackware installation. Had anyone experienced such effect on BSD as well?
Why are you asking about Slackware file caching on a FreeBSD mailing
In any case, what you're probably seeing is the effect of having lots of
spare RAM to cache files. In FreeBSD top look at the Cache and Buf
values up top. If you're doing a lot of file I/O, this can make a
noticeable difference, particularly if you're repeatedly reading the
However, as is usually the case, unless you do some benchmarks on *your*
computer, it's hard to say more than "the first couple GB of RAM you add
will probably make your workstation run faster."
It's not only the Cache and Buf values that show how much memory is used
for caching - any memory which isn't being used by the programs/kernel
and which isn't accounted for in the Free value can be used as cache.
So for example my PC is currently showing 5668KB Cache and 110MB Buf but
also there's also 638MB showing as 'Inact'. The vast majority of that
638MB will be used as cache.
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