General parameters > Chapter Supervisor > Parameter LFTBOX (Number of quickselect elements) 

This parameter is used to define the maximum number of elements loaded in the left lists.

Level of localization / Global variable

This parameter is defined at the level User.It belongs to Chapter SUP (Supervisor) and the Group SEL (Lists and selections),The following parameters are also associated with this chapter and group :

The global variable GNBGAUCHE is associated with it.

Linked parameters

The following parameters are linked to the parameter LFTBOX  :

Supervisor

 LFTBOXTUN (defined at level User) : Left list fill on tunnel

 NBRCHOOSE (defined at level User) : Default elements of selection

Functions concerned

All the functions corresponding to the objects use the value coming from this parameter (which can be modified by the user ) to size the left list.

Comments

It should be noted that in versions 120 and 130, this parameter exists only as a global default value and was illustrated by a field in the user record.

For versions later than 140, this parameter can still be defined at the general level but also by the user.

Performance optimization

The loading time of the lists (left lists, selection, last read) which, in some cases, is necessary for each access to an object, is proportional to the number of elements read, and it consumes resources, both at the level of the processing server and the data server.

In a situation where there is a large number of users, and moreover using complex filtering rules on the data, these queries can have a significant impact on the general perfomances of the system.

Since this parameter allows the number of lines read to be restricted, while still allowing the next lines to be read by means of a simple pagination, it is recommended to give this parameter a reasonable value (for instance, the content of a screen page), although it is possible, in some particular cases, to go well beyond (like several thousand lines).