dosubot[bot] commented on issue #7864:
URL: 
https://github.com/apache/incubator-devlake/issues/7864#issuecomment-2274040383

   <!-- Answer -->
   You do not need to reinstall DevLake. You can resolve the error code 500 
when connecting a MySQL RDS instance by following these steps:
   
   1. Comment out the MySQL part in your `docker-compose.yml` file:
       ```yaml
       # mysql:
       #   image: mysql:8
       #   volumes:
       #     - mysql-storage:/var/lib/mysql
       #   restart: always
       #   ports:
       #     - "127.0.0.1:3306:3306"
       #   environment:
       #     MYSQL_ROOT_PASSWORD: admin
       #     MYSQL_DATABASE: lake
       #     MYSQL_USER: merico
       #     MYSQL_PASSWORD: merico
       #   command:
       #     --character-set-server=utf8mb4
       #     --collation-server=utf8mb4_bin
       ```
   
   2. Comment out the MySQL volume:
       ```yaml
       # volumes:
       #    mysql-storage:
       ```
   
   3. Comment out the `depends_on mysql` part:
       ```yaml
       # depends_on:
       #   - mysql
       ```
   
   4. Set `DB_URL` to your own DB_URL in the `.env` file:
       ```bash
       
DB_URL="mysql://YOUR_USER:YOUR_PASSWORD@YOUR_IP:YOUR_PORT/lake?charset=utf8mb4&parseTime=True"
       # Don't forget to create db named `lake` in your own db, and set 
character-set-server=utf8mb4, collation-server=utf8mb4_bin as below
       #      character-set-server=utf8mb4
       #      collation-server=utf8mb4_bin
       ```
   
   5. Run `docker compose up -d`.
   
   Additionally, if you encounter the error "The total number of locks exceeds 
the lock table size," you can solve it by increasing the 
`innodb_buffer_pool_size` to a higher value in your MySQL configuration. Here 
is an example of how to modify the `docker-compose` file for MySQL:
   
   ```yaml
     mysql:
       image: mysql:8
       ...
       # add the following line to the mysql container
       command: --innodb-buffer-pool-size=200M
   ```
   
   These steps should help you connect to your MySQL RDS instance without 
needing to reinstall DevLake 
<sup>[[1]](https://github.com/apache/incubator-devlake-website/blob/main/versioned_docs/version-v0.16/GettingStarted/DockerComposeSetup.md)</sup><sup>[[2]](https://github.com/apache/incubator-devlake-website/blob/main/versioned_docs/version-v0.19/Troubleshooting/Configuration.md)</sup><sup>[[3]](https://github.com/apache/incubator-devlake-website/blob/main/versioned_docs/version-v0.21/Troubleshooting/Configuration.md)</sup>.
   
   
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