maximum number of solutions generated for solution pool by populate
Sets the maximum number of mixed integer programming (MIP) solutions generated for the solution pool during each call to the populate procedure.
Purpose
Maximum number of solutions generated for the solution pool by populate
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Description
Sets
the maximum number of mixed integer programming (MIP) solutions generated
for the solution pool during each call to the populate procedure.
Populate stops when it has generated PopulateLim
solutions. A solution is counted if it is valid for all filters, consistent
with the relative and absolute pool gap parameters, and has not been
rejected by the incumbent callback (if any exists), whether or not
it improves the objective of the model.
In parallel, populate may not respect this parameter exactly due to disparities between threads. That is, it may happen that populate stops when it has generated a number of solutions slightly more than or slightly less than this limit because of differences in synchronization between threads.
This parameter does not apply to MIP optimization generally; it applies only to the populate procedure.
If you are looking for a parameter to control the number
of solutions stored in the solution pool, consider instead the solution
pool capacity parameter (maximum number of solutions kept in solution pool: SolnPoolCapacity, CPX_PARAM_SOLNPOOLCAPACITY).
Populate will stop before it reaches the limit set by this parameter if it reaches another limit, such as a time limit set by the user. Additional stopping criteria can be specified by these parameters:
relative gap for solution pool:
SolnPoolGap,CPX_PARAM_SOLNPOOLGAPabsolute gap for solution pool:
SolnPoolAGap,CPX_PARAM_SOLNPOOLAGAPMIP node limit:
NodeLim,CPX_PARAM_NODELIMoptimizer time limit in seconds:
TiLim,CPX_PARAM_TILIM
Values
Any nonnegative integer; default: 20.