Initializing help system before first use

BACKGROUNDSELECT

Description
Bit-vector control (see Section Bit-vector controls) to select which tasks to run in background jobs (for example in parallel to the root cut loop).
Type
Integer
Topic areas
Root, Heuristics, Bit-vector
Values
Bit
Meaning
0 
Feasibility jump heuristic.
1 
Fast branch-and-bound heuristic.
2 
Same as bit 1 but with some additional heuristics enabled.
3 
Fix-propagate-repair heuristic.
Default value
-1
Notes
If this is set to -1 (the default) then Xpress decides automatically which tasks to run. Otherwise the value is interpreted as a bitset that indicates which heuristics to run. 0 (zero) means not to run any tasks in the background.
Background jobs that run large neighborhood search heuristics are controlled by HEURSEARCHBACKGROUNDSELECT.
Affects routines
XPRSmipoptimize ( MIPOPTIMIZE), XPRSoptimize ( OPTIMIZE).
See also
HEURSEARCHBACKGROUNDSELECT, BACKGROUNDMAXTHREADS.
Category
Control

Parent Topic Control Parameters

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