Out of memory when dealing many files

[woshidama323]

we found something when dealing to miner with many large files ,The memory of our miner will be exhausted every several hours.
we do some analysis and the results show that such code block will hold very large memory, Here is 108G ?

 ROUTINE ======================== github.com/ipfs/go-merkledag/pb.(*PBNode).Unmarshal in /data2/code/pkg/mod/github.com/ipfs/go-merkledag@v0.3.2/pb/merkledag.pb.go
  108.79GB   108.79GB (flat, cum) 76.37% of Total
         .          .    911:				return ErrInvalidLengthMerkledag
         .          .    912:			}
         .          .    913:			if postIndex > l {
         .          .    914:				return io.ErrUnexpectedEOF
         .          .    915:			}
  108.79GB   108.79GB    916:			m.Data = append(m.Data[:0], dAtA[iNdEx:postIndex]...)
         .          .    917:			if m.Data == nil {
         .          .    918:				m.Data = []byte{}
         .          .    919:			}
         .          .    920:			iNdEx = postIndex

So, Is that normal?

Is this a bug ?

[jennijuju]

#4619 may fix your issue