Mechanical APDL Basic Analysis Guide

ansys150 -m 400

Other ways to change the work space are:

• Specifying the work space size you want on the dialog boxes that appear when you select interactive
  mode or batch mode from the program launcher.


• Using a different VIRTM_MB value in your config150.ans file. A later section in this chapter discusses
  this file in detail.

Caution

Be careful when specifying a value for the -m option. Entering an amount larger than needed

will waste system resources and can degrade system performance.

Given a fixed amount of database space, changing the amount of work space changes the available
scratch space. This is illustrat ed in the following figure.

Figure 21.3: Changing Work Space

Total =
512 MB
(default)

Total =
400 MB

Database Space Scratch Space

256 MB 256 MB

256 MB 144 MB

Database Space Scratch Space

Only scrat ch space is changed, and database space is held constant.

21.3.3. Changing the Amount of Database Space

The easiest way to change the amount of database space is to use the database space entry option
(-db) while activating the program, either via the launcher or via the program execution command.
For example, to request 200 MB of database space (instead of the default of 512 MB for 64-bit machines
or 256 MB for 32-bit machines), the program execution command would read:

ansys150 -db 200

Given a fixed amount of program work space, allocating more database space leaves less for scratch
space and vice versa, as illustrat ed in the following figure.

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Memory Management and Configuration