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Re: Linux limitations
On Sat, May 22, 1999 at 11:25:08AM +0300, Oren Shomron wrote:
> I read an article which points out two limitations of Linux - 2GB of
> RAM and 2GB file sizes. My question is, are these numbers accurate
> (for 2.2?) and if not what are the true limitations and where can I
> read about them.
> I assume the filesystem was ext2...
The 2gb limitation is a compilation time option (that currently doesn't
appear in 'make config', but is documented). In practice, the following
limitation holds - you have 4gb of memory, and you need to split it between
'real' and 'virtual' memory. For example, you can decide that you want 3gb
real memory and 1gb virtual, which would mean each program can get at most
1gb of memory (virtual), and all programs together can use up to 3gb
(plus whatever swap you have, AFAIK).
ext2 is indeed limited to 2gb sized files, and this limitation is supposed
to be lifted later on.
Note that on a 64bit platforms (Alpha, for example), both limitations
don't hold.
Do you know what memory limitation does NT impose on an i386?
(because, as far as I know, using more memory than that penalizes you in
speed).
Nimrod