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I am using Process Document to tokenize text (plus transform case, filter stop words and generate n-grams). I wonder why RapidMiner does not make a use of free memory and CPU and the process takes such a log time.
The current data size is 1059MB and the process is running for almost 5 days The system has four cores and 29GB RAM. on average it uses %46 of CPU and right now it uses 75% of memory (the memory usage is going up slowly).
Please explain if you know why.