Initializing help system before first use

PREROOTTHREADS

Description
Specifies an explicit number of threads that should be used for the Pre-root parallel heuristic phase. By default, this phase will use all threads available to the solver (as governed by the control THREADS).
Type
Integer
Topic areas
Parallel, Heuristics, Memory
Values
-1 
Use all available threads.
0 
Disable pre-root parallel heuristics.
n>0 
Use the specified number of threads, superseding the value of THREADS
Default value
-1
Note
Setting an explicit number of threads does not enable Pre-root parallel heuristics if they are otherwise disabled. To enable this phase, consider the controls HEUREMPHASIS, PREROOTEFFORT, or PREROOTWORKLIMIT.
Note
This control is useful to limit the peak memory usage during Pre-root parallel heuristics, by limiting the amount of problem copies necessary to conduct this phase.
Affects routines
XPRSoptimize ( OPTIMIZE)
See also
PREROOTEFFORT, THREADS
Category
Control

Parent Topic Control Parameters

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