java - 为什么从mysql取数据比spring cache+redis快

Question

当我使用 Spring 缓存时，它需要的时间是直接访问数据库的两倍多，但如果我使用redistempla 从 Redis 获取数据，它比 MySQL 快。所以我可以确保 Redis 中有数据，

另外，我只是测试了一个简单数据的查询，项目使用Spring Boot和Spring Cloud搭配Redis集群

他是我的配置

@Bean
public CacheManager cacheManager(RedisTemplate ObjectRedisTemplate) {
    RedisCacheManager cacheManager = new RedisCacheManager(ObjectRedisTemplate);
    cacheManager.setUsePrefix(true);
    // Number of seconds before expiration. Defaults to unlimited (0)
    cacheManager.setDefaultExpiration(300L);
    return cacheManager;
}

@Bean(value="ObjectRedisTemplate")
public RedisTemplate<String, Object> redisTemplates(JedisConnectionFactory jedisConnectionFactory) {
    RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
    redisTemplate.setConnectionFactory(jedisConnectionFactory);
    redisTemplate.setKeySerializer(new StringRedisSerializer());
    redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
    redisTemplate.setHashKeySerializer(new StringRedisSerializer());
    redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
    return redisTemplate;
}