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I am trying to figure out how to find optimal values for the the ALS userBlocks and itemBlocks parameters.
For example, I am having out of memory issues fitting the ALS model to a matrix with about 100 million users and 300 items and it sounds like these blocks parameters should help but I am unable to find documentation about how these blocks values should be adjusted.
For example, in my case should we be using more blocks? How many more? Is there a recommended ratio of blocks to users/items?
Anyone have any recommendations on best practices with these two settings?