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

This article mainly shows you "why single-threaded Redis is faster", the content is easy to understand, clear, hope to help you solve your doubts, the following let Xiaobian lead you to study and learn "Why single-threaded Redis is faster" this article.

Why is single-threaded Redis so fast?

How fast is Redis? The official answer is 100000 read and write speed per second. Would you be surprised if this is the result of running in a single thread? Why is single-threaded Redis so fast? The reasons are as follows:

Pure memory operation: Redis is completely based on memory, so the read and write efficiency is very high. Of course, there are persistence operations in Redis, which are all completed by fork sub-processes and using the page cache technology of the Linux system, which will not affect the performance of Redis.

Single-threaded operation: single-threading is not a bad thing, single-threading can avoid frequent context switching, frequent context switching will also affect performance.

Reasonable and efficient data structure

The non-blocking Icancano multiplexing mechanism is adopted: the multiplexing model makes use of the ability of select, poll, and epoll to monitor multiple streams' Icano events at the same time, blocking the current thread when idle, and waking up from the blocked state when one or more streams have Icano events, so the program polls all streams once (epoll polls only those streams that actually send events). And only deal with ready streams sequentially, which avoids a large number of useless operations.

These are all the contents of the article "Why single-threaded Redis is faster". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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.