mysql如何处理高并发问题

import pymysql
from pymysql.constants import CLIENT

# 主库配置
master_config = {
    'host': 'master_host',
    'user': 'master_user',
    'password': 'master_password',
    'database': 'master_db',
    'client_flag': CLIENT.MULTI_STATEMENTS
}

# 从库配置
slave_config = {
    'host': 'slave_host',
    'user': 'slave_user',
    'password': 'slave_password',
    'database': 'slave_db',
    'client_flag': CLIENT.MULTI_STATEMENTS
}

def execute_query(query, master=False):
    if master:
        conn = pymysql.connect(**master_config)
    else:
        conn = pymysql.connect(**slave_config)
    cursor = conn.cursor()
    cursor.execute(query)
    result = cursor.fetchall()
    cursor.close()
    conn.close()
    return result

# 写操作（主库）
execute_query("INSERT INTO users (name, email) VALUES ('John Doe', 'john@example.com')", master=True)

# 读操作（从库）
users = execute_query("SELECT * FROM users")
print(users)