FAQ

JavaScript heap out of memory - how to increase the max memory for Node with max_old_space_size

If you want to increase the max memory for Node you can use --max_old_space_size option. You should set this with NODE_OPTIONS environment variable.


# Use 4096 MB as max memory for Node
export NODE_OPTIONS=--max_old_space_size=4096

# Run parallel Jest tests with @knapsack-pro/jest
$(npm bin)/knapsack-pro-jest

# Run parallel Cypress tests with @knapsack-pro/cypress
$(npm bin)/knapsack-pro-cypress

What is --max_old_space_size? It's option for Node 8.


$ node --v8-options

--max_old_space_size (max size of the old space (in Mbytes))
        type: int  default: 0

Other tips

General questions for Knapsack Pro Core JavaScript integration
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