RE: [GT] Q re max-loaded-items

["Weigert, Thomas" <weigert AT mst.edu>]

Right. However,

1. display_indicator.pl and display_signal.pl use nb-item to do what max-loaded-items does in graphics.pl

2. just loading the last n items does not guarantee that you get sensible results if your analysis has dependencies stretching beyond that. There are no checks on whether we have loaded enough data.

As I said, I wonder whether we should advertise this option. I am not saying we should delete it, but as max-loaded-items is not documented, maybe we should leave it undocumented to preserve flexibility in the future.

Th.

> -----Original Message-----
> From: João Costa [mailto:joaocosta
AT
zonalivre.org]
> Sent: Sunday, March 30, 2008 11:02 PM
> To: devel
AT
geniustrader.org
> Subject: RE: [GT] Q re max-loaded-items
> 
> I just read some of these messages recently, but let me share some
> thoughts
> even if late.
> 
> As far as I understand, the difference between nb-items and max-loaded-
> items
> is/was as following:
> 
> max-loaded-items limits the number of records loaded from the database
> into
> the Prices object. it can be useful for performance reasons, as it limits
> the amount of memory used.  only the genericdbi db object actually uses
> this, other db objects load the entire available dataset into memory)
> 
> nb-items simply limits the number of items outputted in some scripts
> (display_indicator.pl, graphic.pl). It has no effect on memory.
> 
> 
> I understand you were dealing with inconsistencies in the use of these
> across scripts. Haven't checked the applied patches, but think that's a
> really good ideia.