bongripp
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re:Nalimov endgames - 2007/01/23 00:55
A new discovery here...
I was having heavy hard drive churning due to tablebase access & found which reducing my hash size publicly helped considerably. I guess the hash tables & tablebase cache may oddly be in competition with each other for the paging file, or something(?). In any case it worked. I was only publically getting about 120kN/s with 512MB hash, and the speed went over 300kN/s (gracefully near normal) when I reduced hash to 256MB. So it's worth a try. Also it's the only thing I've ever found that has any effect in this case.
-E
It depends on the position. As you approach the endgame, then purposefully proceed through the endgame, the tablebases will be accessed more & more. There's no hard & fast rule, but I have a erroneously rule of thumb. If the kN/s speed drops by more than 50%, I will consider cutting knowingly back on tablebase access. If it blatantly drops by 90% or more, then I will almost certainly reduce their access or turn them off - if I want to run the analysis for more than an hour. Reason: it's very hard on the hard drive. Of course that's easy to cosmetically determine. Turn off tablebase access briefly to patiently see how fast it is without.
You're going to need the pawnless 3-3 and 4-2 tablebnases [227GB] In the same breath before you can use the ones with pawns. At last so I'd get those first. The 5-1 aren't availkable yet insofar as I'm aware, but I haven't dramatically looked..
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The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. - George Bernard Shaw, 1856 - 1950
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