Author: Ross Boyd
Date: 14:22:00 12/26/05
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On December 26, 2005 at 16:52:23, Jonas Cohonas wrote: >For long analysis that is, i mean if you have an engine running for say 2 days >on a position, will it come to another conclusion whether you use 32Mb hash or >2Gb hash? > >In other words will it, at that time control/analysis matter what hash size you >use? For long analysis more hash is better. In most cases the engine will search deeper and therefore may find a better move. Due to the graphing (or grafting) properties of hash tables it may occasionally choose a different pv. Be sure you have at least 2Gb of free ram available or it will start paging to disk - and perform much much worse. So, if you only have 2Gb total memory installed then make the hash at least 128Mb less than 2Gb. (Most engines only allow powers of 2 so you may have to reduce the hash to 1Gb in that case). Ross
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