1.创建测试用户：创建一个用户名为test，密码为test 的用户：

create user 'test'@'%' IDENTIFIED  BY 'test';

2. 给测试用户赋权：给用户test赋予数据库test.* 权限

grant SELECT_PRIV,LOAD_PRIV,CREATE_PRIV,ALTER_PRIV ON test.* TO test;

3. 开启 experimental_enable_workload_group 配置项，在fe.conf中添加如下设置，并重启FE：

experimental_enable_workload_group=true

4. 开启pipline，workload_group只在新优化器上生效

set experimental_enable_pipeline_engine = true;

5. 创建workload group

create workload group if not exists test_query
properties ("cpu_share"="10","memory_limit"="10%","enable_memory_overcommit"="true","max_concurrency" = "1","max_queue_size" = "2","queue_timeout" = "3000"
);

6.给用户赋予WORKLOAD权限

GRANT USAGE_PRIV ON WORKLOAD GROUP 'test_query' TO 'test'@'%';

5. 使用test用户登录mysql客户端端

mysql -utest -h127.0.0.1 -P9030 -ptest

6. 设置test用户默认workload_group 为test_query，如果不设置默认是normal

set property 'default_workload_group'='test_query';

7. 使用test执行并发查询。验证workload group功能。发现当并发超过2后会报ERROR : errCode = 2, detailMessage = queue failed, reason=query waiting queue is full, queue length=2

mysqlslap -h127.0.0.1 -P9030 -utest --concurrency=300 --iterations=1 --create-schema=test --query=test.sql