Shulou(Shulou.com)06/01 Report--

This article will explain in detail what the expiration strategy in Redis is. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Expiration Policy of Redis

There are two main expired deletion policies in redis.

Lazy deletion

Lazy deletion means that the key is only detected when we query the key, and delete if the expiration time has been reached. Obviously, one of his drawbacks is that if these expired key are not accessed, then he cannot be deleted and takes up memory all the time.

Delete periodically

Regular deletion means that redis checks the database at regular intervals to delete the expired key. Since it is impossible to poll all key to delete, redis will randomly take some key at a time to check and delete.

This is the end of the article on "what is the expiration strategy in Redis". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.