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Barry,
It's a new entry. I've had a value of 2,500,000 in there for a few
months now. Works perfectly. Although, as mentioned, if you do a lot
of symbol changing, it can slow the system down.
--- In amibroker@xxxxxxxxxxxxxxx, "Barry Scarborough" <razzbarry@xxx>
wrote:
>
> 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@> 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
> >
>
------------------------------------
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