缓存效果：默认缓存10分钟，减少数据库访问量。

下载和安装redis

https://github.com/MicrosoftArchive/redis/releases
定位到redis解压缩后的文件夹中, 打开命令提示符对话框输入"cmd"。然后在命令窗口输入“redis-server.exe redis.windows.conf”出现如下界面即成功启动。
在这里插入图片描述

安装pip install -i https://pypi.tuna.tsinghua.edu.cn/simple django_redis

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple django_redis

settings启用中间件

MIDDLEWARE = [
    'interview.performance.performance_logger_middleware',
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.locale.LocaleMiddleware',
    'django.middleware.cache.UpdateCacheMiddleware',#redis中间件
    'django.middleware.common.CommonMiddleware',
    'django.middleware.cache.FetchFromCacheMiddleware',#redis中间件
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

settings建立CACHES

CACHES = {
    "default": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://127.0.0.1:6379/1",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
            #"PASSWORD":"mysecret",
            "SOCKET_CONNECT_TIMEOUT": 5,  # in seconds
            "SOCKET_TIMEOUT": 5,  # r/w timeout in seconds
        }
    }
}