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 [email protected], "J. Biran" <[EMAIL PROTECTED]> wrote: > > > > HKEY_CURRENT_USER\Software\TJP\Broker\Settings\MaximumNumber > OfBars > > > > Joseph Biran > ____________________________________________ > > > > From: [email protected] > [mailto:[EMAIL PROTECTED] On Behalf Of Paul Ho > Sent: Thursday, July 31, 2008 11:00 PM > To: [email protected] > Subject: RE: [amibroker] Database settings and the amount of > data saved > > > > What registry setting do you have to change? > > > > _____ > > From: [email protected] > [mailto:[EMAIL PROTECTED] On Behalf Of J. Biran > Sent: Friday, 1 August 2008 3:49 PM > To: [email protected] > 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: [email protected] > <mailto:amibroker%40yahoogroups.com> > [mailto:[email protected] > <mailto:amibroker%40yahoogroups.com> ] On Behalf Of Barry > Scarborough > Sent: Thursday, July 31, 2008 9:09 PM > To: [email protected] > <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 >
