Github user bgreeven commented on the pull request:
https://github.com/apache/spark/pull/1290#issuecomment-52456503
Thanks for your feedback. I'll write some documentation, and also add some
comments. I'll try with similar size data.
The internal data structure of the weights (and gradient) would have a
dimension of (1001*500)+(501*18)=509518 floats. The weights are stored in a
non-sparse vector, sometimes converted to Breeze. There may be an issue with
that for this size of data. It should be possible though, so worth to have a
look on how to fix it.
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