fmcquillan99 commented on issue #392: DL: Improve performance for predict
URL: https://github.com/apache/madlib/pull/392#issuecomment-494189650
 
 
   
   (1)
   `model_size` is not computed correctly
   
   ```
   DROP TABLE IF EXISTS model1, model1_summary;
   
   SELECT madlib.madlib_keras_fit('mnist_train_packed',  -- source_table
                                  'model1', -- model
                                  'model_arch_library',  -- model_arch_table
                                  1,  -- model_arch_id
                                  $$ loss='categorical_crossentropy', 
optimizer='adam', metrics=['acc'] $$,  -- compile_params
                                  NULL,  -- fit_params
                                  5,  -- num_iterations
                                  0,  -- gpus per host
                                  NULL,  -- validation_table
                                  NULL,  -- metrics compute frequency
                                  'Frank',  -- name
                                  'A test model'  -- description
                                 );
   madlib=# select model_size from model1_summary;
    model_size 
   ------------
            43
   (1 row)
   ```
   
   ```
   model_simple = Sequential()
   model_simple.add(Dense(100, activation='relu', input_shape=(784,)))
   model_simple.add(Dense(10, activation='softmax'))
       
   model_simple.summary()
   
   Layer (type)                 Output Shape              Param #   
   =================================================================
   dense_1 (Dense)              (None, 100)               78500     
   _________________________________________________________________
   dense_2 (Dense)              (None, 10)                1010      
   =================================================================
   Total params: 79,510
   Trainable params: 79,510
   Non-trainable params: 0
   _________________________________________________________________
   ```
   
   Should be the size in bytes of the bytea storage of the model weights.
   

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