Write MIP nodes to disk
Type: double
Default value: Infinity
Minimum value: 0
Maximum value: Infinity

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 NodefileDir parameter can be used to choose a different location.

If you still exhaust memory after setting the NodefileStart 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 Threads 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.