Author: m.d.hurd
Date: 06:21:59 09/13/03
Go up one level in this thread
On September 13, 2003 at 08:59:34, William Penn wrote: >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 The highest mine will go is 818 MB. I would guess that the programmers have been consertavative and assumed windows will take a chunk of memory plus the gui of chessbase and calculated that around 80% should be the maximum available which prevents a new user from crashing his machine. Regards Mike
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