Re: [amibroker] Re: Is database limited by the number of bars in database setting?

["Tomasz Janeczko" <groups@xxxxxxxxxxxxx>]

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@xxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
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 amibroker@xxxxxxxxxxxxxxx, "wonet2001" <wonet2001@xxx> 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
>>
> 
> 
> 
> 
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> To get support from AmiBroker please send an e-mail directly to 
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> 
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> 
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> 
> 
> 


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