contrib/storage-jdbc/src/main/resources/bootstrap-storage-plugins.json

{
  "storage": {
    "rdbms": {
      "type": "jdbc",
      "driver": "xxx.Driver",
      "url": "jdbc:xxx:xxx",
      "username": "xxx",
      "password": "xxx",
      "caseInsensitiveTableNames": false,
      "sourceParameters" : {
        "maximumPoolSize": 10
      },
      "enabled": false
    }
  }
}