parameters: (self, pv_batch_size)
docstring: Set pv batch size. It will be effective during enable_pv_merge
  
          Examples:
              .. code-block:: python
  
                import paddle
                dataset = paddle.distributed.fleet.BoxPSDataset()
                dataset._set_pv_batch_size(128)
          Args:
              pv_batch_size(int): pv batch size
docstring_summary: Set pv batch size. It will be effective during enable_pv_merge
docstring_tokens: Set pv batch size . It will be effective during enable_pv_merge
function: def _set_pv_batch_size(self, pv_batch_size):
          """
          Set pv batch size. It will be effective during enable_pv_merge
  
          Examples:
              .. code-block:: python
  
                import paddle
                dataset = paddle.distributed.fleet.BoxPSDataset()
                dataset._set_pv_batch_size(128)
          Args:
              pv_batch_size(int): pv batch size
  
          """
          self.proto_desc.pv_batch_size = pv_batch_size
function_tokens: def _set_pv_batch_size ( self , pv_batch_size ) : self . proto_desc . pv_batch_size = pv_batch_size