内存利用率R h2o

Question

我正在研究《泰坦尼克号》。但是，我遇到了一个问题，即模型不再运行，而是抛出了一个似乎与内存分配有关的错误。

Error: water.exceptions.H2OModelBuilderIllegalArgumentException: Illegal argument(s) for DRF model: DRF_model_R_1542172359909_24373_cv_1.  Details: ERRR on field: _ntrees: The tree model will not fit in the driver node's memory (2.4 KB per tree x 500 > Zero  ) - try decreasing ntrees and/or max_depth or increasing min_rows!

这是我的代码示例：

 y<-"Survived"
x<-setdiff(names(newtrain_imp),y)
rf_mod<-h2o.randomForest(x,y,train_set,
                         nfolds = 10,
                         keep_cross_validation_predictions = T,
                         seed=233,
                         mtries = 8,#sampling default-1 set to al
                         ntrees = 500,
                         max_depth = 12,
                         validation_frame = validate_set,
                         binomial_double_trees = T)

Answer 1

在使用h2o初始化h2o的过程中，init（max_mem_size = 8G）在此处设置希望h2o使用的RAM数量。