Desktops usually no; Servers yes.
Posted Dec 9, 2004 16:43 UTC (Thu) by dwheeler
Parent article: Fedora Core 3 on AMD64
The main advantage of 64bit systems is that more than 4G of memory
is directly addressible. Whether or not that's a useful
advantage depends on what you do with your system.
Currently, most desktop users will be quite happy with 32bits.
One exception is some high-end CAD systems, where you want in-memory simulations that take more than 3Gig of memory.
But some large servers, especially large database servers, can
really use this.
Database systems work better if there's lots of memory, for example,
and it's easier to address lots of memory given a 64-bit address space.
The Wikipedia database currently runs on 32bits; they've considered switching to 64bits, but at the time the costs and leading-edge-ness convinced them to stay with 32bit systems.
As these get addressed, they'll probably move to a 64-bit system for their main database.
Many large commercial outfits run databases on 64bit systems, for this reason.
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