Author: Detlef Pordzik
Date: 13:21:19 01/17/98
Go up one level in this thread
On January 17, 1998 at 16:09:36, Bert wrote:
>Yes, if your hash table is too large, you will get to hear a lot of disk
>seeks, not just on the first move out of book, but very often
>thereafter. When correctly sized, you should hear a lot of seeks on the
>first move of the first game out of book, and nothing more after that.
>
>Here is the formula that ChessBase supplies for Fritz 5 to help
>calculate hash table size:
>
> HT(KB)=2.0*Pfreq(mhz)*t(s)
>
>HT is the hash table size.
>
>Pfreq(mhz) is the clock speed of the processor in mhz.
>
>t is the time available per move in seconds.
>
>They give the example of a tournament with an average of 3 minutes per
>move on a Pentium 200, which requires a HT size of 72mb.
Yes, I know, Bert.
G5 + the GM books, for example, using 30 MB hash on a 128 MB W95a
system, starts
with disc seeks for about 10-20 seconds, astonishingly, as well.
Then it's over for good.
In case of the F5 formula - which I know, of course, I must say that
I've never heard or met such a behaviour, let's name it very uncommon -
to stay polite.
I really don't know how many users can
follow
this - requested - idea, even in times of rapidly lowering hash
prices....
keep on rockin'
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