What is "dual-channel DDR"?

Wed Mar 16 17:21:35 UTC 2005

On Wed, Mar 16, 2005 at 10:42:00AM -0500, Andrew Hammond wrote:
> We run database machines on Celestica A8449 quad optreons w/ 16GB of
> memory. If you want to do Opterons with > 4GB, you need a 64bit distro.
> SuSE is the best, although debian isn't bad and is constantly improving.

No, you only need 64bit if you want more than 2 or 3GB per process.  PAE
works just fine up to 64GB.  You will gain a bit of performance in some
cases going 64bit, although for some tasks you also use more ram since
pointers are 8 instead of 4 bytes each.

Lennart Sorensen
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