Etherfang set up a private chain and began to dig mines to appear OOM. Memory keeps growing until the geth process is killed

problem: OOM appears when building a private chain and starting to dig a mine. Memory keeps growing until the geth process is killed

< H2 > build the private chain of Ethernet Square < / H2 >

Dockerfile
-----------------------------------
FROM ubuntu

LABEL version="1.0"
LABEL maintainer="test@outlook.com"

ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update && apt-get install --yes software-properties-common
RUN add-apt-repository ppa:ethereum/ethereum
RUN apt-get update && apt-get install --yes geth

COPY genesis.json /home/root/genesis.json
RUN chown -R root:root /home/root/genesis.json

USER root
WORKDIR /home/root
ENTRYPOINT bash
-----------------------------------

- Docker
docker build -t eth_node .
- Docker
docker run --rm  -it -p 8546:8545  -v /eth/data/node1:/home/root --name eth_dev_node1 eth_node
- /eth/data/node1/  genesis.json 
``
{
  "alloc": {
  },
  "config": {
    "chainId": 1800,
    "homesteadBlock": 0,
    "eip155Block": 0,
    "eip158Block": 0
  },
  "nonce": "0x000000000000002a",
  "difficulty": "0x002000",
  "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "coinbase": "0x0000000000000000000000000000000000000000",
  "timestamp": "0x00",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "extraData": "0x",
  "gasLimit": "0x2fefd8"
}

- 
docker exec -it {cointainerId} /bin/bash
- geth 
geth version 1.8.12-stable
- 
geth --datadir /home/root/ init genesis.json

- 
nohup geth --datadir /home/root/ --identity "NODE_1" --gcmode archive  --rpc --rpccorsdomain "*" --networkid=1800 --rpc --rpcaddr 0.0.0.0 --rpcport "8545" --port "30303" --rpcapi "db,eth,net,web3,admin,personal,miner" --nodiscover --cache 16 &
- geth
geth attach geth.ipc
- 
personal.newAccount("123456")
- 
miner.start(1)

< H2 > OOM appears at the beginning of mining. Memory keeps growing until the kill geth process. Have you encountered this problem or something wrong with my configuration or startup commands? < / H2 >