Hello, 64 bit version can use 16 TERA bytes of virtual memory (4000 times more than 32 bit)
Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "zozuzoza" <[email protected]> To: <[email protected]> Sent: Friday, July 31, 2009 10:31 PM Subject: [amibroker] Re: AB has for Win32 stopped working problem > Hi Tomasz, > > What is the the difference in terms of performance/speed between > -running 64 bit Amibroker on x64 windows and > -running 32 bit Amibroker on x64 windows? > > Thanks, > Zozu > > > --- In [email protected], "Tomasz Janeczko" <gro...@...> wrote: >> >> Hello, >> >> You guys seem to have some crazy expectations. Your computer hardware has >> limits ! >> >> Let me calculate, >> >> 8 years, 1-minute data ? 480 minutes per trading day, 250 trading days per >> year = 960K bars per symbol >> One bar 40 bytes. One symbol 38MB. >> >> 100 Symbols = 3.8GB >> >> For data alone. >> =========== >> >> Now imagine that if you are running backtest you must have at least TWICE >> that memory to >> keep intermediate results. >> >> You have simplt run out of memory. >> >> >> Solutions for your "problem": >> 1. Decrease number of symbols >> 2. Decrease number of bars >> 3. Decrease in-memory cache in Tools->Preferences, "Data" to 11 symbols >> 4. Run 64 bit version of AmiBroker on 64 bit version of Windows and have >> 10GB RAM installed >> >> Best regards, >> Tomasz Janeczko >> amibroker.com >> ----- Original Message ----- >> From: "mkecera" <mkec...@...> >> To: <[email protected]> >> Sent: Friday, July 31, 2009 9:55 AM >> Subject: [amibroker] AB has for Win32 stopped working problem >> >> >> >I tried backtesting on one minute data (8 years,100 symbols, 1 minute >> >data). I run a strategy that backtested without any >> >problems >> >on 5 minute data and every time I try it on 1 minute data I get an error: >> >AB for Win32 has stopped working. This is when AB is >> >trying to list all the trades in AA. Then I am forced to close AB. >> > >> > Tried to fiddle with the Data settings in preferences to no success. >> > Has anyone encountered this problem before? I would appreciate any help. >> > Thanks. >> > >> > (I have Vista 32) >> > >> > BR, >> > >> > MK >> > >> > >> > >> > ------------------------------------ >> > >> > **** IMPORTANT PLEASE READ **** >> > This group is for the discussion between users only. >> > This is *NOT* technical support channel. >> > >> > TO GET TECHNICAL SUPPORT send an e-mail directly to >> > SUPPORT {at} amibroker.com >> > >> > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at >> > http://www.amibroker.com/feedback/ >> > (submissions sent via other channels won't be considered) >> > >> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: >> > http://www.amibroker.com/devlog/ >> > >> > Yahoo! Groups Links >> > >> > >> > >> > > > > > ------------------------------------ > > **** IMPORTANT PLEASE READ **** > This group is for the discussion between users only. > This is *NOT* technical support channel. > > TO GET TECHNICAL SUPPORT send an e-mail directly to > SUPPORT {at} amibroker.com > > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at > http://www.amibroker.com/feedback/ > (submissions sent via other channels won't be considered) > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > Yahoo! Groups Links > > >
