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LUSAS Modeller memory allocation
Note that you can check how much
virtual memory Modeller is using by looking at the process “Lusas_M.exe”
in Task Manager as shown below:
This shows that Modeller has
allocated 1,169,244KB of virtual memory (VM Size or Commit
Size consisting of RAM and pagefile), that there is currently
142,532KB in RAM "Mem Usage" and that Modeller's
peak usage of RAM for this session was 577,752KB ("Peak
Mem Usage").
You can check how much virtual
memory Modeller is using via Help>About LUASAS Modeller
as shown below:
This shows that Modeller has
allocated 1,640.0MB of virtual memory in this case and there there
is 1431.9MB free potentially available for Modeller to grab and
use on this PC ath this time.
Memory allocated to Modeller array (NLPZ)
It is
generally recommended that the NLPZ setting is not changed
from its installation default setting. If
adjustment should become necessary, NLPZ may be set in a Modeller start-up file
with guidance from Support@lusas.com.
With default installation settings
for V15, Modeller grabs two contiguous 300MB blocks of virtual
memory when it starts up. One block is used immediately and
the other is reserved for use later (NLPZ), for post-processing
for example. This amount may be different for earlier
version of LUSAS. If Modeller needs more, it will grab more
of the available virtual memory. If Modeller runs out of
memory, then the user will encountered a Memory
Allocation Failure dialog which explains how much memory is in
use, how much is available and how much more Modeller had tried to
grab which was unsuccessful. The user will be able at this
point to try closing other applications, and there is a button to
"Release reserved memory . . ." that
Modeller had allocated for the purposes of post-processing.
This may just free up enough memory for Modeller to be able to
continue. If there are simply not enopugh resources for
Modeller to continue then Modeller will be forced to stop running.
If you encounter any memory related
problems, or if you are using V14.7 or an earlier version of
LUSAS, please email your model file ".mdl" and a
screenshot of any error message encountered along with a
description of the action you were performing in Modeller (for
example a geometry operation, meshing or using Graph Wizard to
plot results) to Support@lusas.com
for advice.
Memory allocated to Modeller cache (NPGS)
It is
generally recommended that the NPGS setting is not changed
from its installation default setting. If
adjustment should become necessary, NPGS may be set in a Modeller start-up file
with guidance from Support@lusas.com.
More on how LUSAS
uses PC resources
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