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The reason could be if the ApplyTo and/or the Range settings
were not set correctly.
UM
----- Original Message -----
From: "Fred" <fctonetti@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Friday, June 27, 2003 7:55 PM
Subject: [amibroker] Re: PT and memory usage
> This topic was addressed at length in ABTool and appeared initially
> to my eyes to be a memory leak in ABTool. ABTool has since been
> shown to NOT be the culprit which only leaves one other possibility
> which can be shown to exhibit similar problems without using anything
> from ABTool. What if anything is being done about it, I have no
> idea. I will tell you however that you seem to be using memory
> faster than I do when I run it. I usually have no trouble running
> several thousand mutual funds through it with 2-300 combos of
> optimization over a 5-10 year period w/o getting anywhere near 1G.
>
> --- In amibroker@xxxxxxxxxxxxxxx, Sidney Kaiser <s9kaiser@xxxx> wrote:
> > I am running a Portfolio Trader scan this morning and thought this
> > information might be helpful to other users.
> >
> > PT scan, 16 iterations on ~280 stocks for 6 months: I have had
> memory
> > problems with this scan so I decided to monitor what was going on
> by using
> > the Windows Task Manager, ( win 2k, win xp ) cntl-alt-delete to
> invoke
> >
> > I was not sure AB was running so I started there.
> >
> > WTM processes tab: sure enough Broker.exe was getting 98% of the
> CPU cycles.
> >
> > To check the memory usage go to the WTM Performance tab: the
> interesting
> > things here is the Page File usage chart and the Physical Memory
> statistics.
> >
> > At first you can watch the executing programs eat up your physical
> (RAM)
> > memory. It sucked down my 1024 Mb of RAM to about 5Mb before it
> started to
> > do serious disk swapping for temporary storage. At the moment the
> scan is
> > still running and the Page File usage is up to 1.75 Gb. If you run
> out of
> > Page File space the program will crash with (probably) an out of
> memory
> > error message.
> >
> > You can monitor your system to see how a big scan is doing. If you
> have
> > some spare HD space you can increase the Page File size.
> >
> > Note: exit all running programs before you attempt changing the
> Page File
> > size or you may regret the resulting occasional crash...
> >
> > start/control panel/system/advanced/performance
> settings/advanced/virtual
> > memory change/
> >
> >
> > The recommended settings at the bottom of the page will probably be
> too
> > small. Use the custom setting to increase the min/max Page
> > File settings. At the moment I am using 2Gb min and 4 Gb max.
> Reboot to
> > have the settings take effect.
> >
> > Cheers
> > Sid
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