NAV: SLTechnology News&Howtos > Database >

• 

  Some indicators of MySQL monitoring items

  The monitoring item indicates the number of page created by ProblemMySQL Innodb_pages_created in the InnoDB table. Innodb _ pages_read is read from InnoDB buffer pool

  2022-06-01 11:56:52 Views: 269
• 

  Linux package Management-rpm

  1. Package management function: package the component files of the compiled application into one or more package files, so as to realize the installation and upgrade of the package more conveniently and quickly. uninstall and query and other management operations 1 package composition manifest (each package is implemented separately) file list installation or uninstall

  2022-06-01 11:56:46 Views: 244
• 

  What is sql cmd?

  Today, I would like to talk to you about what sql cmd is, many people may not know much about it. In order to make you understand better, the editor has summarized the following contents for you. I hope you can get something from this article. Sql cmd means the SQL command. Structured query language (Str)

  2022-06-01 11:56:45 Views: 284
• 

  Mysql Innodb architecture

  Innodb architecture Innodb storage engine mainly includes memory pool and background threads. Memory pool: multiple memory blocks form a memory pool, which mainly maintains the internal data of processes / threads and caches disk data. Modify memory and redo log background threads before modifying files: refresh inside

  2022-06-01 11:56:45 Views: 278
• 

  What does the relational data model mean?

  Today, I will talk to you about the meaning of the relational data model, which may not be well understood by many people. in order to make you understand better, the editor has summarized the following content for you. I hope you can get something according to this article. A relational data model is a data model that enters data in the form of relationships or tables.

  2022-06-01 11:56:40 Views: 252
• 

  MySQL master-slave synchronization.

  Mysql database installation: server IP address planning: master server IP 172.20.2.46 slave server IP 172.20.2.47 II, install mysql server 1. Unzip the downloaded installation to the / usr/local directory

  2022-06-01 11:56:27 Views: 209
• 

  How many dbs are there by default in redi?

  This article shows you how many redi default dbs, the code is concise and easy to understand, absolutely can make your eyes bright, through the detailed introduction of this article, I hope you can get something. Redis supports multiple databases, and the data in each database is isolated and cannot be shared

  2022-06-01 11:56:27 Views: 279
• 

  Reasons why php uses redis

  This article will explain in detail the reasons for the use of redis in php. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have a certain understanding of the relevant knowledge after reading this article. 1. Brief introduction to Redis redis is in the Nosql database

  2022-06-01 11:56:27 Views: 262
• 

  Detailed explanation of linux installation mysql 5.7.21 and resolution of problems encountered during installation

  The problems encountered in the installation process are: 1, my-default.cnf file can not be found 2, mysql startup error 3, mysql temporary password can not log in to the installation environment centos 6.0download database: [root@CLanguage src

  2022-06-01 11:56:14 Views: 265
• 

  JDK Source Code Reading-2-Design pattern-Creative pattern

  a. Create a pattern abstraction factory (Abstract Factory) javax.xml.parsers.DocumentBuilderFactoryDocumentBuilderFactory through Factory

  2022-06-01 11:56:02 Views: 262
• 

  MySql database operation

  MySql database operation-log in to the MySql:---Windows environment and enter cmd. Enter mysql-h localhost-u root-p, and then enter the password to start mysql;, where localhost is mys.

  2022-06-01 11:56:02 Views: 276
• 

  Installation and configuration of Redis

  1. Install $wget http://download.redis.io/redis-stable.tar.gztar xzf redis-stable.tar.gzcd redis-stablema

  2022-06-01 11:56:02 Views: 289
• 

  The solution that the number of mongodb connections on CentOS6 cannot exceed 1000

  Problem description: the production environment found that CPU is running at full capacity, and the number of connections to MongoDB has never exceeded 1000. Solution: 1. Check mongodb's log and report the following error: Wed Nov 21 15:26:09 [initandlis]

  2022-06-01 11:56:01 Views: 263
• 

  Character set problem of Zabbix Monitoring [4]

  There are three character set problems often encountered in ix monitoring: 1. The solution to the problem of Chinese garbled code in Zabbix monitoring and control of displaying Chinese garbled code in zabbix diagram [accessory] solution: 123456 Q1. From the window host path C:\ Windows\ Fon

  2022-06-01 11:55:54 Views: 207
• 

  Mariadb simple configuration

  The reason for the creation will not be explained in detail, but go straight to the topic. Make a note of the commands you need to know. The first thing to understand is the concept: MariaDB is based on mysql, so the command lingua franca mysql. The process is roughly as follows: after logging into the database as shown in the figure, you can use SHOW DATABASES

  2022-06-01 11:55:54 Views: 296
• 

  Mysql-boost-5.7.18 installation method

  The installation environment is: system: centos 6 X86_X64 memory: no less than 4Gmysql version: mysql-boost-5.7.18.tar.gz this article mainly explains the deployment of mysql multi-instance portal application my on the same host

  2022-06-01 11:55:54 Views: 242
• 

  Installation of Mysql database

  System environment: CentOS 6.864-bit Mysql version: mysql-5.6.30Mysql official website: http://www.mysql.com/ generally speaking, you need to download GA (stable) version in a formal production environment, and the installation directory is usually

  2022-06-01 11:55:36 Views: 205
• 

  Mongo DB installation (window)

  1. After downloading the mongodb (mongodb-win32-x86_64-2008plus-ssl-3.4.4-signed) database to your local computer, the installation begins, as shown below. The installed mongodb, as shown in the figure

  2022-06-01 11:55:36 Views: 204
• 

  Summary of MySQL5.6 online Table structure change (online ddl)

  MySQL supports online table structure modification operation (online ddl) since 5.6.17, that is, dml and dql operations are not blocked in the process of changing table structure. According to whether the table copy is needed during the operation, online ddl can be divided into the following two categories: 1.

  2022-06-01 11:55:35 Views: 248
• 

  The method of changing sql rows to columns and columns to rows

  Such as the title: there is a table EMP with two fields: name,chengji has three records, which represent 70 points in Chinese (name), 80 points in mathematics (name) and 58 points in English (name). Please query the three records with a sql and use the conditions

  2022-06-01 11:55:31 Views: 255