Search code examples
knime

Increase RAM available for Knime?

Is there an easy way to increase the RAM available in Knime through a config file or through menu options?

I am constantly running into "heap-space" errors during execution and it by default limits the number of categorical variables to 1,000, as well as difficulty displaying charts with more than n values (~10,000).

Example error:

ERROR Decision Tree Learner 0:65       Execute failed: Java heap space

Thanks!

Solution

  • Sure, you can edit knime.ini (in the knime or knime_<version> folder) and change the row starting with -Xmx (I think by default it is 2048m, two GiB). Though do not use so much memory that would cause the OS to swap as Java do not play very well with swapping.

    (Displaying too many variables might still be slow, maybe you could aggregate them somehow.)