I was coming at the problem from a different point of view. I was losing data in the database. In my search and post I used "losing data" not "number of bars" and I had no idea you had answered the question. Actually, you never answered it so using your name would have prevented finding a reply to the message. Angelo had answered it two days later. He suggested 500,000, I had it set and 10,000 but when I tried to change it to 100,000 I got a message that it would severely degrade the performance. So I left it alone not knowing that the database setting was the max amount of data that would be saved. The help text says "Number of bars to load" not the max number of bars the database would save/hold, and it did not explain that the database would be truncated at the number of bars set in the database settings. The new IB plug-in drops the load and just says "number of bars:" So it is pretty easy to get confused when the help text does not keep up with the release and never explains what the field implies. So I got into a catch 22 and never understood what was going on and no one answered my post explaining what was going on.
I use advanced search all the time. With 120,000 messages in your forum one has little choice. With almost 120,000 messages in the forum, it would really be helpful if some of the pertinent data got into the help text and the help text was updated or put into the new "AB book" that has been proposed of late. The answers may be there, forum or help text, but are really hard to find at times. I really hope "the book" is on-line because it will become obsolete almost immediately in hard copy form. Barry --- In [email protected], "Tomasz Janeczko" <[EMAIL PROTECTED]> wrote: > > FWIW: I used "advanced search" on YahooGroup > http://finance.groups.yahoo.com/group/amibroker/msearch_adv > entered "number of bars" (with quotation marks) in the "message body" and > my name in the "author" field and all results are relevant to the question. > > Best regards, > Tomasz Janeczko > amibroker.com > ----- Original Message ----- > From: "Barry Scarborough" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Tuesday, February 12, 2008 3:33 PM > Subject: [amibroker] Re: Is database limited by the number of bars in database setting? > > > > Thanks for the reply. Sadly, it isn't always easy to find something > > in the forum posts using a search. I tried many search arguments and > > never ran across the post you referenced, or any other post that > > answered the question. > > > > Barry > > > > --- In [email protected], "Tomasz Janeczko" <groups@> > > wrote: > >> > >> Hello, > >> > >> Actually posts on the same subject were replied many times in the > > past. > >> > >> > >> Last time similar thread was in September 2007 > >> http://finance.groups.yahoo.com/group/amibroker/message/115085 > >> > >> Short answer: yes "number of bars" setting in the Database Settings > >> specify maximum number of bars that are fed through the plugin to > > the AB database. > >> > >> While AB does not have any hard coded limit, and you can have any > > length of > >> data in off-line databases, it uses this setting to avoid > >> growing real-time databases beyond certain point to make sure the > > performance is good. > >> > >> So: > >> 1. you can import unlimited number of bars into off-line databases > > (only computer's memory is the limit) > >> 2. on-line real-time databases use the user-definable limit in the > > Database Settings, it works FIFO-way. > >> > >> Best regards, > >> Tomasz Janeczko > >> amibroker.com > >> ----- Original Message ----- > >> From: "Barry Scarborough" <razzbarry@> > >> To: <[email protected]> > >> Sent: Tuesday, February 12, 2008 5:26 AM > >> Subject: [amibroker] Re: Is database limited by the number of bars > > in database setting? > >> > >> > >> > Yea good luck! It must be a secret. I have the same problem and > > asked > >> > why about 5 times and no one ever answered why. I hope you get an > >> > answer because I would really like to know why too. I keep > > importing > >> > data from back up files and it keeps going poof. I have a 320 gig > > HD so > >> > space isn't a problem. Keeping the data around is a problem. I > > had > >> > imported data for qqqq back to 2/14/07 in January and I just > > looked at > >> > it and it now starts in June. I'll be interested in the reply you > > get. > >> > Cheers, > >> > Barry > >> > > >> > --- In [email protected], "wonet2001" <wonet2001@> wrote: > >> >> > >> >> it's a intraday 1 minute database with IB datafeed, the number > > of > >> > bars > >> >> in database setting is 30,000, I noticed that the database is > > limited > >> >> to 30000 bars no matter how long I have accumulated data, my > > purpose > >> > is > >> >> to accumulate more than six months data for backtesting, but > > seems I > >> >> keep loosing old data as time goes by. > >> >> > >> >> what is the solution? should I make the number of bars bigger, > > say > >> >> 500,000? will it affect the performance of AB for my intraday > > trading? > >> >> > >> >> thanks > >> >> > >> > > >> > > >> > > >> > > >> > 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 > > > > > > >
