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RE: [amibroker] Scan/Explore Times



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Dave,

  Yes, if you read the text of my last post.  I saved the database after
scan 1 and went to scan 2(different scan) and saved database again.  By scan
3 (again a different scan), I was back down to Avg speed of 50 seconds for
all subsequent scans.

EF 

-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
Of MarketMonk777
Sent: Monday, July 10, 2006 7:29 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: RE: [amibroker] Scan/Explore Times

Curious to know if you have solved the problem.  What is the status? 

-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
Of EF
Sent: Monday, July 10, 2006 7:43 AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: RE: [amibroker] Scan/Explore Times

May have figured it out.  Tomasz mentioned that I might have been scanning
against a native database.  No, I have always scanned against the TC 2005
database.  But what I did do, was after I had done my first scan, I saved
the database.  Next scan which was a different from the first scan occurred
in half the time.  Saved the database again.  My third scan (again different
from the prior 2) occurred in about 50 seconds.  All scans from there,
occurred in about the same time.  I am scanning the TC2005 database group of
stocks in all cases.

EF 

-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
Of MarketMonk777
Sent: Sunday, July 09, 2006 4:07 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: RE: [amibroker] Scan/Explore Times

Post the code or shoot it to me via a private email and I will run it
against my database.  Another thing is even though your scanning or filters
may not have changed - did you add any additional colums for display that
require calculations?

Each of my scans take on average 4 to 6 minutes.

Dave 

-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
Of John Emery
Sent: Sunday, July 09, 2006 4:03 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: RE: [amibroker] Scan/Explore Times

Dave,

  I have held everything constant.  I am very experienced at computer use,
so that was the first questions I asked myself. "What has changed?"  I can
not figure out what I might have done that changed the scan times from 50
seconds to 5 minutes.  I even saved my afls and unistalled/reinstalled the
AB to see I could reset to the original state that gave me the 50 second
scans.  No luck.  I came to group to see if anybody else had experienced
this type of problem and could provide some insight into the issue. 

EF 

-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
Of MarketMonk777
Sent: Sunday, July 09, 2006 10:11 AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: RE: [amibroker] Scan/Explore Times

Hi EF,

That's a fairly typical scan time.  Has your filter been set to "all stocks"
the entire time?  Maybe in the past you were looking at a smaller set of
stocks?  Has your code changed in that it requires more computations now?

Regards,

Dave
MarketMonk777

-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf
Of fasttrader101
Sent: Friday, July 07, 2006 3:05 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Scan/Explore Times

I have been using AB for about 8 weeks.  Really like the program.  I have
developed an issue that I have not been able to figure out.  I used to be
able to do a scan in about 50 seconds.  

  About 2 weeks ago, the same scans started to take about 3-4 minutes per
scan.  I have tried to adjust my database size, increased the amount of
available memory, increased the number of bars and nothing seems to change
the amount of time needed for a scan

  My current settings in Database settings are:
Using the tc2000 Plugin
Local Data Storage Enabled
# of Bars 2000
Base interval EOD

Megabytes 4000
In memory cache 8936

any suggestions on how to get back to the faster scans

Thanks
EF









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