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innodb monitor overview innodb monitor is a built-in monitoring module of innodb. You can view it with show engine innodb status. innodb monitor output can be output in the error log To view finer grained innodb lock information, you need to open innodb_status_output_locks Type of innodb monitor There are two types of innodb monitor: innod ...

In the previous article, we gave an overview of database knowledge:< Database overview >, this paper introduces some basic and commonly used SQLite database knowledge. SQLite Foundation SQL basic syntax insert INSERT INTO Table name (Column name 1,...) VALUES (Column 1 value,...); modify UPDATE Table name SET Column name 1= Colum ...

Kotlin grammar manual (I) When using kotlin, because the mastery is not reliable enough, it is still a habit of Java programming, which wastes the language features, convenience and indirectness provided by kotlin. When reading some Android open source libraries, it is difficult to read because many of them are written by kotlin syntax, and it ...

1. Environmental planning Environment system version, hereinafter referred to as host A and host BA: CentOS 7.6 (172.20.10.4)B: RedHat 8.2 (172.20.10.6) Machine A establishes and uploads test files for easy distinction. The naming method is "system abbreviation + system version + virtual account abbreviation" [root@CentOS7-6 test]# ...

Configuration version 1. Create a new Moudle, springmvc-02-hello, and add web support! 2. Make sure the dependency of spring MVC is imported! 3. Configure web XML, register DispatcherServlet <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema ...

The default logging framework used by SpringBoot is logback. Spring boot starter contains the spring boot starter logging module. The log framework is logback. Therefore, we do not need to introduce the spring boot starter logging module separately.<dependency> <groupId>org.springframework.boot</groupId> <artifactId ...

1, Process oriented and object oriented Before learning classes, let's review some connections and differences between C language and C + +: C language is process oriented, focusing on the process, analyzing the steps of solving the problem, and gradually solving the problem through function call. At the code level, it embodies functions. ...

Hit in front: part of the picture is cut from the horse soldier teacher servlet and jsp Lecture notes. Video link: https://www.bilibili.com/video/BV1cV411H7RY?p=1 **Operation principle of tomcat: * Interactive process: The client sends a request to the server. tomcat request receives the request and presents it to the service request object. ...

HTML CSS transition effect 1,transition Transition: through the transition, you can specify the switching mode of the attribute of an element when it changes, so as to create some very good effects and improve the user experience. For example: transition: height 2s; /*When the height of the element changes, it takes two seconds to transition ...

Stored procedures and functions MySQL supports stored procedures and functions from version 5.0. Stored procedures and functions can encapsulate complex SQL logic. Applications do not need to pay attention to the complex SQL logic inside stored procedures and functions, but simply call stored procedures and functions. 1. Overview of stored pr ...