IBM 15 Manuale Utente
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Chapter 12
Figure 12-1
System Options dialog box
System Options dialog box
Maximum memory.
Select to impose a limit in megabytes on SPSS Modeler’s memory usage. On
some platforms, SPSS Modeler limits its process size to reduce the toll on computers with limited
resources or heavy loads. If you are dealing with large amounts of data, this may cause an “out of
memory” error. You can ease memory load by specifying a new threshold.
resources or heavy loads. If you are dealing with large amounts of data, this may cause an “out of
memory” error. You can ease memory load by specifying a new threshold.
Use system locale.
This option is selected by default and set to English (United States). Deselect
to specify another language from the list of available languages and locales.
Managing Memory
In addition to the
Maximum memory
setting specified in the System Options dialog box, there are
several ways you can optimize memory usage:
Set up a cache on any nonterminal node so that the data is read from the cache rather than
retrieved from the data source when you run the data stream. This will help decrease the
memory load for large data sets. For more information, see the topic
memory load for large data sets. For more information, see the topic
in Chapter 5 on p. 50.
Adjust the
Maximum members for nominal fields
option in the stream properties dialog box.
This option specifies a maximum number of members for nominal fields after which the
measurement level of the field becomes Typeless. For more information, see the topic
measurement level of the field becomes Typeless. For more information, see the topic
in Chapter 5 on p. 55.
Force IBM® SPSS® Modeler to free up memory by clicking in the lower right corner of
the window where the memory that SPSS Modeler is using and the amount allocated are
displayed (xxMB / xxMB). Clicking this region turns it a darker shade, after which memory
allocation figures will drop. Once the region returns to its regular color, SPSS Modeler has
freed up all the memory possible.
displayed (xxMB / xxMB). Clicking this region turns it a darker shade, after which memory
allocation figures will drop. Once the region returns to its regular color, SPSS Modeler has
freed up all the memory possible.
Setting Default Directories
You can specify the default directory used for file browsers and output by selecting
Set Directory
or
Set Server Directory
from the File menu.
Set Directory.
You can use this option to set the working directory. The default working
directory is based on the installation path of your version of IBM® SPSS® Modeler or from
the command line path used to launch SPSS Modeler. In local mode, the working directory
the command line path used to launch SPSS Modeler. In local mode, the working directory