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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
>
>
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.489 / Virus Database: 288 - Release Date: 6/10/2003
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