Author: William Penn
Date: 05:59:34 09/13/03
Go up one level in this thread
On September 13, 2003 at 07:30:49, m.d.hurd wrote: >On September 12, 2003 at 21:40:13, William Penn wrote: > >>[running Shredder 7 with the March 2003 GUI update] >> >>I have 1024MB (1GB) RAM. My video graphics siphons off 32MB, leaving 992MB >>available. Shredder 7 therefore decides, by some kind of internal formula, that >>my maximum allowed hash shall be 784MB. It refuses to allow me to set it any >>larger. No matter what I've tried, it reverts to 784MB or less. >> >>Note: For those who have 1GB RAM free and clear (100% available), the hash limit >>shall be 816MB instead of my 784MB. (784+32=816) I expect this is the same > >On my machine it is 819 MB > > >>the Fritz 8 GUI, which I believe is identical to the Shredder 7 GUI. Of course >>I'm talking about the Chessbase GUI, not the Classic Shredder one. >> >>I really should be able to set my hash to 800MB (or perhaps a little more) >>without a serious system problem, but the Shredder won't allow it. It would take >>a little longer for the swapfile, but that's OK with me. I'm not in a big hurry! >>I only run Shredder in infinite mode for an hour or more anyway, so I don't care >>if it takes 5 minutes for the swapfile. If it is taking too long, I can always >>abort it. But Shredder 7 refuses to give me that option... >> >>Yes, I know it won't help the engine's strength significantly, but I'd like to >>try it nevertheless. Maybe I just like round numbers -- 800MB sounds better to >>me than 784MB! > >Go here for info : http://www.chessbase.com/support/support.asp?pid=199 > > >>Anybody know a tweak to allow this? I've tried some obvious tweaks with the .ini >>files, and looked around in the system registry, but didn't get lucky. If anyone >>knows how to do this, I'd very much like that info. >>Thanks. >>WP > >Regards > >Mike Based on the formula in that article... HT[KB] = 2.0 * PFreq[MHz] * t[s] I have a 2.0MHz processor, and analyze each move for at least 1 hour (3600 seconds) in Infinite Analysis mode. I do not use any other time controls. Therefore my optimum hash size would be 14.4GB. So obviously I should set my hash as high as possible for optimum results. However that isn't possible with the current Shredder 7/Fritz 8 GUI. When you enter a larger-than-recommended-maximum hash size, it asks whether it should ignore the recommended maximum size (Yes/No). Then it completely ignores your choice, and refuses to set the hash to whatever you've entered if larger than the recommended maximum. That is presumably a bug in their algorithm's logic, and I need to know how to get around it (tweak it, so it works correctly)... WP
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