[core] How to obtain memory occupied by object ref?

Hi, is there an easy way to get the memory occupied by some object ref? E.g. ray.sizeof(ray.put(object))

[rkooo567]

@jmoralez I think right now you can obtain the information using ray.experimental.get_object_locations. Note that this is an experimental API, and the semantics could be changed.

In [3]: @ray.remote 
   ...: def f(): 
   ...:     return 4 
   ...:                                                                                                               

In [4]: r = f.remote()                                                                                                

In [6]: ray.experimental.get_object_locations([r])                                                                    
Out[6]: 
{ObjectRef(a67dc375e60ddd1affffffffffffffffffffffff0100000001000000): {'node_ids': [],
  'object_size': 15}}

[rkooo567]

For now, you can achieve this using ray memory command (it is not programmable api tho). I can take a look if there’s a good way to support this.