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Practical case of SQL optimization: speed up your database
2022-07-05 01:53:00 【Wen Yu is solemn】
1、MySQL Basic architecture
1)MySQL The infrastructure diagram of
Sinister client It can be regarded as a client , There are many clients , Like we often use you CMD Black window , Like what we often use for learning WorkBench, Like what enterprises often use Navicat Tools , They are all one client . The pile on the right can be regarded as Server(MySQL The service side ), We will Server Subdivide into sql Layer and storage engine layer .
When the data is queried , Will return to the actuator . On the one hand, the executor writes the results to the query cache , The next time you check again , You can get data directly from the query cache . On the other hand , Respond directly to the result back to the client .
2) Query database engine
① show engines;
② show variables like “%storage_engine%”;
3) Specifies the storage engine for the database object
create table tb(
id int(4) auto_increment,
name varchar(5),
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