This thread is over 1 year old. I suspect that he's solved his problem by now ;)
Mike --- In [email protected], "uman3344" <tan_flamshun...@...> wrote: > > > > --- In [email protected], "ozzyapeman" <zoopfree@> wrote: > > > > Dang! A bit of a false alarm in being able to run 8 instances in parallel. > > I had assumed (always a mistake) that the runs went smoothly. But when I > > checked my PC this morning, found out that the runs did not actually > > complete. The PC must have crashed and rebooted somewhere in between. > > > > So I restarted, this time, using only 4 instances, and sat in front of the > > screen for a few minutes. Indeed, the system crashed with a "Memory > > management error"! > > > > Damn! With 12GB of ram on Vista64 with an i7 processor (seen as 8 > > processors by the OS), shouldn't I be able to run 4 measly instances of AB, > > each doing an optimization over 2-years worth of 1-minute data? The total > > size of my symbol database is only 156mb. > > > > It's a new PC with a fresh install, and only Avast anti virus running at > > startup. The only other programs installed are AB, Firefox, Office 2003 and > > Thunderbird. And when I run AB, all other programs are closed. > > > > Is there some memory management utility I can run that can better allocate > > memory? > > > > Or is Vista64 really no better than plain old WinXP32, as far as being able > > to run more instances of AB on a single machine? I thought that one of the > > main advantages of Vista64 over XP32 was precisely the ability to make more > > RAM available for multiple instances of a program. > > > > > > > > --- In [email protected], "ozzyapeman" <zoopfree@> wrote: > > > > > > I was comparing Vista64 to XP32 (which I was using), not XP64. > > > > > > I imagine XP64 would probably allow one to run as many instances of AB as > > > Vista64. But from what I could gather, XP64 seemed less > > > reliable/stable/supported than Vista64, so I went with the latter. > > > > > > Been using Vista64 on an overclocked i7 PC, with 12GB ddr3 ram now for > > > about a week. Certainly a big difference over my XP32 install. Yesterday > > > I ran 8 large walk-forward tests in parallel (1-min databases, several > > > years), no problem. Didn't even come close to maxing out the system. The > > > XP32 install would tend to hang/crash if I tried 3 such parallel runs. > > > > > > Will play around with multiple instances over the next few weeks to see > > > just how far I can push things. > > > > > > And once I turned off that annoying UAC thing, haven't noticed any > > > disadvantages yet with Vista. Maybe its bad reputation was only warranted > > > in the first year it was out - with respect to driver issues and other > > > problems. All that stuff seems to have been cleared up in the latest > > > service packs. > > > > > > > > > > > > --- In [email protected], Keith McCombs <kmccombs@> wrote: > > > > > > > > Ozzy -- > > > > What makes you think that, given the same hardware, Vista64 allows you > > > > to run more instances of AB than XP64? > > > > > > > > TJ -- > > > > Thanks for your comments on the subject. Admittedly, I didn't > > > > understand how he was doing the testing. > > > > > > > > All -- > > > > Once again I would like to suggest: > > > > "How about writing some benchmarks in afl? I assume the code wouldn't > > > > have to be very complex, nor would it have to be for any sort of > > > > 'winning' system. Just something that everyone could run and we could > > > > get some comparative speed results." We might also need to make a > > > > static artificial data base so that everyone was running the same test. > > > > > > > > That would help many of us when it comes time to buy a new, or update > > > > an > > > > older, computer. > > > > -- Keith > > > > > > > > ozzyapeman wrote: > > > > > > > > > > Thanks for the clarification. > > > > > > > > > > My understanding then, based on what I can gather from the net, is > > > > > that Windows Vista 64-bit will give me the sole advantage of allowing > > > > > me to run many more instances of AmiBroker, especially with the i7 > > > > > processor and 12 GB of RAM, vs on WinXP. > > > > > > > > > > In that way, I can run more large optimizations simultaneously, > > > > > without running out of memory, thus saving a lot of time overall. > > > > > > > > > > I had come across one article that tested as much, with other 32-bit > > > > > apps running on XP32 vs Vista64, and the difference in multitasking > > > > > ability was huge. > > > > > > > > > > --- In [email protected] > > > > > <mailto:amibroker%40yahoogroups.com>, > > > > > "Tomasz Janeczko" <groups@> wrote: > > > > > > > > > > > > Those Windows Vista tests were made using Microsoft SQL server. > > > > > > > > > > > > AmiBroker does NOT use Microsoft SQL server or any other 3rd party > > > > > > DB. > > > > > > It uses own original low-level database that is highly specialized > > > > > > for quote processing is pretty independent from operating system. > > > > > > It works equally well on every Windows version > > > > > > (starting from Win95 and ending at Windows 7). > > > > > > > > > > > > Best regards, > > > > > > Tomasz Janeczko > > > > > > amibroker.com > > > > > > ----- Original Message ----- > > > > > > From: "ozzyapeman" <zoopfree@> > > > > > > To: <[email protected] <mailto:amibroker%40yahoogroups.com>> > > > > > > Sent: Tuesday, March 17, 2009 7:17 AM > > > > > > Subject: [amibroker] Re: OT: Computer recommendation for AB > > > > > > optimizing > > > > > > > > > > > > > > > > > > > Whoa. Just read that article. Seems that WinXP 64 makes better > > > > > sense by far to drive my new Intel i7 PC. The speed difference is > > > > > > > quite significant. I might have just wasted money shelling out on > > > > > a Vista 64-bit installation disk. > > > > > > > > > > > > > > Is Amibroker 32-bit pretty stable on WinXP 64? I only have > > > > > experience running it on WinXP 32. > > > > > > > > > > > > > > If I only plan on running AmiBroker 5.24, TWS 892, and other > > > > > > > basic > > > > > 32-bit trading tools on the PC (and maybe Firefox and Outlook), > > > > > > > would WinXP 64 be the way to go, or are there hidden > > > > > > > disadvantages > > > > > in going with that OS? > > > > > > > > > > > > > > I am aiming for the fastest backtesting platform possible. > > > > > > > > > > > > > > > > > > > > > --- In [email protected] > > > > > <mailto:amibroker%40yahoogroups.com>, Keith McCombs <kmccombs@> wrote: > > > > > > >> > > > > > > >> Dingo -- > > > > > > >> Please read > > > > > > >> > > > > > http://www.infoworld.com/article/09/01/22/03TC-windows-multicore_3.html > > > > > > > > > > <http://www.infoworld.com/article/09/01/22/03TC-windows-multicore_3.html> > > > > > > >> for some comparisons between Vista64 and XP64. > > > > > > >> -- Keith > > > > > > >> > > > > > > >> dingo wrote: > > > > > > >> > 50% longer for AB to run - hardly believable. > > > > > > >> > > > > > > > >> > d > > > > > > >> > > > > > > > >> > On Thu, Mar 12, 2009 at 3:51 PM, Keith McCombs <kmccombs@ > > > > > > >> > <mailto:kmccombs@>> wrote: > > > > > > >> > > > > > > > >> > A few personal thoughts: > > > > > > >> > 1. The 2.93GHz costs $470 more than 2.66. I doubt that very > > > > > > >> > many > > > > > > >> > of us can tell the difference without a stopwatch. > > > > > > >> > > > > > > > >> > 2. I don't know about running AB, but in many published speed > > > > > > >> > tests, Vista64 takes about 50% longer than XP64. > > > > > > >> > > > > > > > >> > -- Keith > > > > > > >> > > > > > > > >> > > > > > > > >> > ozzyapeman wrote: > > > > > > >> >> > > > > > > >> >> Thanks. I was looking into i7 based-PCs. But aren't all i7's > > > > > > >> >> quad-cores to begin with? And apparently the OS sees an i7 as > > > > > > >> >> 8-core due to the way it's designed. > > > > > > >> >> > > > > > > >> >> Dell seems to have a good deal on i7 XPS desktops at 2.93 Ghz > > > > > > >> >> > > > > > > >> >> --- In [email protected] > > > > > <mailto:amibroker%40yahoogroups.com> > > > > > > >> >> <mailto:amibroker%40yahoogroups.com>, dingo <waledingo@> > > > > > > >> >> wrote: > > > > > > >> >> > > > > > > > >> >> > Intel dual core i7 with fast clock - AB only uses 1 core. > > > > > > >> >> > 3gig > > > > > > >> >> mem. Intel > > > > > > >> >> > SLC flash (if you've got the money otherwise WD Raptor). > > > > > > >> >> > Medium > > > > > > >> >> video card. > > > > > > >> >> > > > > > > > >> >> > > > > > > > >> >> > d > > > > > > >> >> > > > > > > > >> >> > On Wed, Mar 11, 2009 at 12:57 AM, ozzyapeman <zoopfree@> > > > > > > >> >> > wrote: > > > > > > >> >> > > > > > > > >> >> > > I should add that I need to run exhaustive optimizations, > > > > > > >> >> > > as > > > > > > >> >> opposed to > > > > > > >> >> > > CMAE or using Fred's IO, as my variables are > > > > > > >> >> > > discontinuous - > > > > > > >> >> not traditional > > > > > > >> >> > > indicator-type variables. > > > > > > >> >> > > > > > > > > >> >> > > In my parallel dream life, I run AB Ultra Professional > > > > > > >> >> > > 7.0 on > > > > > > >> >> 8 state of > > > > > > >> >> > > the art graphics cards, with thousands of processors, > > > > > > >> >> > > 500,000 > > > > > > >> >> times faster > > > > > > >> >> > > than good old AB 5.24. > > > > > > >> >> > > > > > > > > >> >> > > But I digress. ;-) > > > > > > >> >> > > > > > > > > >> >> > > In the real world, what is the best I can do? > > > > > > >> >> > > > > > > > > >> >> > > > > > > > > >> >> > > --- In [email protected] > > > > > <mailto:amibroker%40yahoogroups.com> > > > > > > >> >> <mailto:amibroker%40yahoogroups.com>, "ozzyapeman" > > > > > > >> >> <zoopfree@> > > > > > wrote: > > > > > > >> >> > > > > > > > > > >> >> > > > Now that I am just about trading full time, my main PC > > > > > > >> >> > > > has > > > > > > >> >> become a > > > > > > >> >> > > dedicated trading computer. That only leaves me with a > > > > > > >> >> > > clunky > > > > > > >> >> second PC > > > > > > >> >> > > (6-years old) for doing offline optimizing. And it's waaay > > > > > > >> >> too slow. > > > > > > >> >> > > > > > > > > > >> >> > > > So I am in the market for a new PC, and want to get > > > > > > >> >> something powerful, > > > > > > >> >> > > but don't want to overpay for stuff that won't be used. > > > > > > >> >> > > For > > > > > > >> >> example, 8GB of > > > > > > >> >> > > RAM sounds great, but if WinXP only uses 4GB (or 3?) then > > > > > > >> >> > > I > > > > > > >> >> imagine the > > > > > > >> >> > > other 4 GB just goes to waste? > > > > > > >> >> > > > > > > > > > >> >> > > > If I plan to use this PC mainly for offline optimizing > > > > > > >> >> > > > and > > > > > > >> >> backtesting, > > > > > > >> >> > > what are the recommended specs? I want as much speed as I > > > > > > >> >> > > can > > > > > > >> >> possibly get. > > > > > > >> >> > > My optimizations tend to be humongous, taking days on a > > > > > > >> >> > > quad > > > > > > >> >> core. > > > > > > >> >> > > > > > > > > > >> >> > > > Any hardware gurus please feel free to chime in: > > > > > > >> >> > > > > > > > > > >> >> > > > - RAM? > > > > > > >> >> > > > - Quad-core vs Eight-core? > > > > > > >> >> > > > - OS? > > > > > > >> >> > > > - HD type (flash vs mechanical)? > > > > > > >> >> > > > - any other hardware/software suggestions for > > > > > > >> >> > > > increasing > > > > > speed? > > > > > > >> >> > > > > > > > > > >> >> > > > Thanks! > > > > > > >> >> > > > > > > > > > >> >> > > > > > > > > >> >> > > > > > > > > >> >> > > > > > > > > >> >> > > > > > > > > >> >> > > ------------------------------------ > > > > > > >> >> > > > > > > > > >> >> > > **** 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 <http://amibroker.com/ > > > > > <http://amibroker.com/>> > > > > > > >> >> > > > > > > > > >> >> > > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at > > > > > > >> >> > > http://www.amibroker.com/feedback/ > > > > > <http://www.amibroker.com/feedback/> > > > > > > >> >> <http://www.amibroker.com/feedback/ > > > > > <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/ > > > > > <http://www.amibroker.com/devlog/> > > > > > > >> >> <http://www.amibroker.com/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/ > > > > > <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/ > > > > > > > <http://www.amibroker.com/devlog/> > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > You might want to check up your overclocking stability using softwares like > Orthos for CPU or Memtest for memory. Have a play with the core voltage, > raise like 0.025 when the tests fails and repeat them until you can reach a > balance between stability and speed. > > Andy >
