bug#10877: Wimpy external files.

[Rogier Wolff]

On Sat, Feb 25, 2012 at 02:59:21PM +0000, Pádraig Brady wrote:
> Some very quick testing here (a while ago), shows -S2M -T/dev/shm
> was as fast or faster than big buffers, as well as being "nicer" to
> the rest of the system.

If that is the case, I expect it is still way faster to sort chunks of
the processor cache size, and then merge them in memory before writing
out chunks of a gigabyte (in my case with 8G RAM) to disk.

On the other hand. I'm not sure how efficient the 500-way merge is
going to be.

        Roger. 

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