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Subject: Tip: how to reduce hard drive churning with tablebases

Author: William Penn

Date: 20:49:58 03/08/04


Pretty simple. Reduce hash size. That's the only thing I've found to have a
significant effect when tablebase access starts to churn the hard drive
constantly. Engine speed (kN/s) falls dramatically at that point, perhaps to 10%
or less of normal speed, and never recovers. However using smaller hash size
appears to fix this problem.

For example my computer has 1G RAM installed. I can run Shredder 8 with 768MB
hash normally, although I often use 512MB which the op system prefers a bit
more. Now one would think that 512MB hash would be OK in any situation with 1G
RAM, but not so. It's too much hash when tablebase access starts to crank up
heavy in endgame situations. At that point, reducing hash size to 256MB usually
fixes this problem, restoring engine speed to a reasonable kN/s. I haven't yet
found it necessary to goto 128MB hash.

[Windows XP Home, Athlon XP 2400+/2.0GHz, 1G RAM]
WP




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