Use old parallel algorithm for histogram construction by default #2501
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It has been reported that new parallel algorithm (dmlc#2493) results in excessive message usage (see issue dmlc#2326). Until issues are resolved, XGBoost should use the old parallel algorithm by default. The user would have to specify `enable_feature_grouping=1` manually to enable the new algorithm.
Laurae2
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Jul 14, 2017
Updating to dmlc/xgboost#2501 (09/07/2017)
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It has been reported that new parallel algorithm (#2493) results in excessive
message usage and random crashes. Until issues are resolved, XGBoost should use
the old parallel algorithm by default. The user would have to specify
enable_feature_grouping=1manually to enable the new algorithm.