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I must have missed this message.
I just modified the value of an existing key.
Make sure you check the path exactly! The key name is
HKEY_CURRENT_USER\Software\TJP\Broker\Settings\MaximumNumber
OfBars
(watch out for line truncations)
The key is a DWORD.
Joseph Biran
____________________________________________
-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx
[mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of sidhartha70
Sent: Friday, August 01, 2008 12:07 AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Re: Database settings and the amount of
data saved
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
> >
>
------------------------------------
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.
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
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