Document `tuple:info()`

[TarantoolBot]

Related dev. issue(s): tarantool/tarantool#6762
Related doc. issue(s): #3841

Product: Tarantool
Since: 3.0
Root document: https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_tuple/
SME: @ Gumix

Details

tuple_object:info() - Get information about the tuple

Returns a table with the following fields:

• data_size - Size of the MessagePack data in the tuple.
  This number equals to number returned by tuple_object:bsize().
• header_size - Size of the internal tuple header.
• field_map_size - Size of the field map.
  Field map is used to speed up access to indexed fields of the tuple.
• waste_size - The amount of excess memory used to store the tuple
  in mempool.
• arena - Type of the arena where the tuple is allocated.
  Possible values are: "memtx", "malloc", "runtime".
  Requested by @ Gumix in tarantool/tarantool@ab24dfb.