[amibroker] Re: Losing data in intraday database, how?

["Angelo" <ima_cons@xxxxxxxx>]

--- In amibroker@xxxxxxxxxxxxxxx, "Barry Scarborough" <razzbarry@xxx> 
wrote:
>
> I keep losing data from my intraday database. At one time I had 
data 
> back to Feb 07. Today I noticed that I have lost data for a number 
of 
> symbols. For example I now have data only back to Aug for QQQQ and 
> back to July for QID. But that is not true for everything in the 
> database. If the data for each stock started on the same date/time 
> that would mean everything before that date was purged but that 
isn't 
> the case. The oldest data I can find starts in April and that 
varies. 
> This is not the first time this has happened but it is the first 
time 
> I have lost so much data at once. What can cause the data to be 
> purged? Are there any database settings that control how much data 
is 
> stored in the database? 
> 
> My database settings are 10000 bars, 1 minute data. 
> 
> In preferences the default database settings are cache size 100, 
num 
> bars to load 300 and max megabytes 300. There is a Local database 
> save option of 5000 max but this line is not checked. I don't see 
> anything else that would limit the size of the database. My EOD 
> database has the same settings.
> 
> I am using AB version 4.90.5 with the IB plugin. 
> 
> Any insight into this would be appreciated. 
> 
> Thanks,
> Barry
>


Have a look at this discussion:

http://finance.groups.yahoo.com/grou...message/111640

Basically, as of now, you can

- increase the bar (you can up the parameter even at 500000);
- make a back up of the database once every X days (avisable anyway).





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