Write MIP nodes to disk
If you find that the Gurobi optimizer exhausts memory when solving a
MIP, you should modify the
NodefileStart parameter. When the
amount of memory used to store nodes (measured in GBytes) exceeds the
specified parameter value, nodes are compressed and written to disk.
We recommend a setting of
0.5, but you may wish to choose a
different value, depending on the memory available in your machine.
By default, nodes are written to the current working directory. The
parameter can be used to choose a different location.
If you still exhaust memory after setting the
parameter to a small value, you should try limiting the thread count.
Each thread in parallel MIP requires a copy of the model, as well as
several other large data structures. Reducing the
parameter can sometimes significantly reduce memory usage.
Note: Only affects mixed integer programming (MIP) models
For examples of how to query or modify parameter values from our different APIs, refer to our Parameter Examples.