MySQL Slow Performance In Docker

General Discussions
22

Worrisome that this has been open for this long without resolution.
I wish Docker would add a “recommended database and performance optimizations” section to their docs.

1 Like
23

For the benefit of anyone finding this issue via Google, and where you are using Docker Desktop for Mac, the following are worth a read: https://docs.docker.com/compose/compose-file/#caching-options-for-volume-mounts-docker-desktop-for-mac and https://docs.docker.com/docker-for-mac/osxfs-caching/.

By adding the delegated option to the end of your volume specification in docker-compose (or via the docker run command), you reduce the consistency requirements between container and host (which is generally fine for the database). Here’s an example from my docker-compose file:

version: '3.7'

services:
  mysql:
    image: mysql:5.7
    environment:
      MYSQL_ROOT_PASSWORD: example
    volumes:
      - ~/Projects/Mike/mysql:/var/lib/mysql:delegated

Making this change resulted in a substantial speed improvement.

2 Likes
24

I have same problem. Docker container much slower run on host machine with python script use large memory (10GB) or with sqlite3.

26

Looks like adding --skip-name-resolve resolved the issue for me. Full command:

docker run -p 3306:3306 \
  --name global-mysql \
  -v $PWD/conf:/etc/mysql/conf.d \
  -v $PWD/logs:/logs \
  -v $PWD/data:/var/lib/mysql \
  -e MYSQL_ROOT_PASSWORD=root \
  -d mysql:5.7 \
  --skip-name-resolve
1 Like
27

Thank you @renomarx this change fix the issue on my side

28

It’s Great, work well