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I do not have an existing entry by that name. I looked in all the
folders under Broker. Did you add this as a new entry? If you added
it as a new entry where did you come up with the label
MaximumNumberOfBars and what values are supported? I am running AB
4.90.5.
Thanks,
Barry
--- In amibroker@xxxxxxxxxxxxxxx, "J. Biran" <jbiran@xxx> wrote:
>
>
>
> HKEY_CURRENT_USER\Software\TJP\Broker\Settings\MaximumNumber
> OfBars
>
>
>
> Joseph Biran
> ____________________________________________
>
>
>
> From: amibroker@xxxxxxxxxxxxxxx
> [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of Paul Ho
> Sent: Thursday, July 31, 2008 11:00 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: RE: [amibroker] Database settings and the amount of
> data saved
>
>
>
> What registry setting do you have to change?
>
>
>
> _____
>
> From: amibroker@xxxxxxxxxxxxxxx
> [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of J. Biran
> Sent: Friday, 1 August 2008 3:49 PM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: RE: [amibroker] Database settings and the amount of
> data saved
>
> You are correct, AB will only save number of bars specified
> in the database settings.
> I save tick data of few future contracts. To keep the whole
> 3 months of history I had to set that number to 1,000,000!
> (you need to edit the registry to allow that setting). This
> results in a data file that can reach 30 MB per symbol.
> I do not think there is a penalty in performance once the
> symbol is loaded. There seems to be s long time-lapse when
> changing symbols.
>
> Joseph Biran
> ____________________________________________
> -----Original Message-----
> From: amibroker@xxxxxxxxxxxxxxx
> <mailto:amibroker%40yahoogroups.com>
> [mailto:amibroker@xxxxxxxxxxxxxxx
> <mailto:amibroker%40yahoogroups.com> ] On Behalf Of Barry
> Scarborough
> Sent: Thursday, July 31, 2008 9:09 PM
> To: amibroker@xxxxxxxxxxxxxxx
> <mailto:amibroker%40yahoogroups.com>
> Subject: [amibroker] Database settings and the amount of
> data saved
>
> I set up a 5 second database today and let the number of
> bars default
> to 1000, duh. I am trying to build a long term database for
> "forward"
> testing using BarReplay. When I tried to use the data there
> wasn't too
> much there, duh again. I changed the database settings to
> 200000, 84
> days, but when I hit OK it tells me there will be
> performance
> degradation. I didn't think AB loaded all the bars but only
> enough to
> fill the indicators. Why are we getting this message, what
> does it
> really mean and why does the database default to so small a
> number of
> bars?
>
> I had wondered why I kept losing data. It seems AB truncates
> the data
> in the database to the number of bars specified on the
> database
> settings. Is that the max size of the database? I always
> thought,
> especially with the message about performance, that this was
> the number
> of bars that would be loaded. I did not know it was the max
> database
> size and that AB would truncate the data when that number
> was exceeded.
> Before it does that there should be some warning message
> that the data
> will be truncated unless the database size is changed. Data
> is
> important and should not simply be deleted. It would be much
> clearer if
> the parameter said database size per symbol. That would give
> us a clue
> as to what is happening when we start losing data. And maybe
> the
> message text should be changed if the size of the database
> does not
> impact performance.
>
> What needs to be done so I can archive lots of data but not
> impact
> performance? I surely don't want it to load a 100,000 or a
> million bars
> when I open a symbol. With terabyte hard drives archiving
> lots of data
> is pretty cheap these days. Back in the early days of AB 40
> GB drives
> were standard. No longer.
>
> Barry
>
> ------------------------------------
>
> Please note that this group is for discussion between users
> only.
>
> To get support from AmiBroker please send an e-mail directly
> to
> SUPPORT {at} amibroker.com
>
> For NEW RELEASE ANNOUNCEMENTS and other news always check
> DEVLOG:
> http://www.amibroker.com/devlog/
>
> For other support material please check also:
> http://www.amibroker.com/support.html
> Yahoo! Groups Links
>
------------------------------------
Please note that this group is for discussion between users only.
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For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
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