On Thu, 1 Dec 2011 12:29:14 +0100, Casper Wandahl Schmidt wrote:
That didn't quite help me understand, because how can the OS map from
ie.
0-4GB to 4-8GB (the window is moved) when it can only use a 32bit
register
to tell the machine where to look in the psysical memory, that is
where my
knowledge ends :) So I read about PAE and found out that it uses 2
registers
(36 bits due to some bits being used as flags) and that makes good
sense,
but how can the cpu calculate an address without overflow and send a
command
to the bus containing a 36bit address (or whatever fetches the bits
from
RAM)? That is where I'm puzzled but I guess it is because I'm not at
all
into ISA-level and below :)
Well, it's rather out of the scope of this list.
On the other hand, increasing java heap size is not always the best
option. It heavily depends on memory usage pattern in your application.
In general: the bigger heap, the longer GC will run.
--
Mikolaj Rydzewski <m...@ceti.pl>
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