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Original address: https://mysqlserverteam.com/mysql-explain-analyze/   MySQL 8.0.18 was just released. October 17, 2019 ), which includes a new feature to analyze and understand how queries are executed: explain analyze. What is explain analyze EXPLAIN ANALYZE is a query analysis tool that tells you how much time MySQL spends on queries and why ...

Golang uses selenium to operate Chrome 1. Demand Solve the problem of automatic login, and solve the problem of crawler by the way. 2. Basic concepts Selenium: selenium is a tool for Web application testing. Selenium testing runs directly and automatically in the browser, just like real users operate manually. Webdriver: Chrome driver is an au ...

1: Background 1. Story telling Last year, all the isv short message channels on the Jushi tower of Ali connected to Ali communication. We made a connection transformation and used the. net sdk provided by Ali. website: https://help.aliyun.com/document_detail/114480.html Colleagues used ons -. Net In v1.1.3, there will be a program crash a few ...

Original text: ASP.NET Core file upload preface First blog post Introduced how to asp.net Core uses Redis and Protobuf for Session caching. This article is a small function used in the development process, how to do single file and multi file upload. If you think it will help you, you may as well click "recommend". cat ...

Zookeeper https://zookeeper.apache.org/doc/current/zookeeperOver.html ZooKeeper is a distributed, open-source coordination service for distributed applications. It exposes a simple set of primitives that distributed applications can build upon to implement higher level services for synchronization, configuration maintenance, and groups and nami ...

Crawling the data information about python position in the pull net, and storing the crawling data into various csv files, then cleaning the data of the relevant fields in the csv file, and making further analysis on the data visualization, including histogram display, histogram display, word cloud display, etc. according to the visualization d ...

In the early stage, due to the small business volume of the production environment. So logs are commit ted one by one. There was no problem with the operation. Later, with the expansion of business concurrency, the log writing frequently deals with the database, resulting in the database connection pool often occupied, until the program crashes ...

1. After getting the user name, password and authentication code in the background: (1) Get the data submitted by the form (2) Determine whether the verification code is correct or not If the verification code is correct: 1. Encrypt the password in the form by MD5 MD5 moduleHttps://www.npmjs.com/package/md5 1,install cnpm install md5 --sav ...

1, Login verification. You can't access other pages without login. Judge whether the user has logged in, and use the middleware in the egg. New middleware folder under app, new adminauth.js File, type: var url = require("url"); module.exports = options => { return async function adminauth(ctx, next) { // 1. The user does not log ...

On Synergetic process   a collaboration is simply a more lightweight thread that is not managed by the operating system kernel and is completely controlled by the program (executed in user mode). A co program is interruptible within a subroutine, and then switches to other subroutines, returning when appropriate to continue execution. Ad ...