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Using 10x more data per symbol will give you slow down in all areas.
2 million bars is 64 MB per symbol of quote data and 8 MB per single AFL array
(if quickafl is not used). As formulas depending on complexity can use hundreds of arrays
this means approaching gigabytes of RAM.
Handling that much of data is not "easy". Remember than RAM bandwidth
is limited to few GB per second. Therefore just accessing that amount
of data is question of seconds, not counting the calculations.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "sidhartha70" <sidhartha70@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Thursday, August 21, 2008 2:48 PM
Subject: [amibroker] Re: Size of Database...
> Anyone...?
>
> Many Thanks
>
> --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@xxx> wrote:
>>
>> This may have been answered before, but...
>>
>> I set up two DB's in AB... both IQ Feed tick DB's.
>>
>> 1. Is 200,000 bars per symbol.
>> 2. The second is 2,000,000 per symbol.
>>
>> Practially, operationally, where will AB be slower in the use of the
>> second DB...?? In charting? Backtesting (obviosuly)? In symbol
>> switching etc...?
>>
>> I'm just trying to work out how motivated I should be to have small
>> DB's...
>>
>> Thanks
>>
>
>
>
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>
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> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
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>
>
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