MySQL > select * from ‘OOM’;
My host memory is only 100G, now I want to scan a 200G table, will the DB host memory used up? Logical backup, is not...
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Tag: mysql
InnoDB Principles: Why Indexes get Faster?
February 5, 2024
by Joyce Khan
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Let's say you're given a very thick book called Ideas for Java programming, and you don't have a table of contents. If you want to...
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Resolve the Redis and MySQL cache double write inconsistency problem
February 5, 2024
by Vanessa Johnson
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The redis and mysql double-write caches are not consistent: however, in terms of updating the cache, whether to update the cache or delete the cache...
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Introduction to InnoDB Storage Engine
February 5, 2024
by Prisha Kapadia
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Storage engine is the core of the database. For MySQL, storage engine runs in the form of plug-ins. Although MySQL supports a wide variety of...
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MySQL 12 – High performance index optimization
February 5, 2024
by Aarav Sami
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Hello, I'm Larry Wang. Creating and using indexes correctly is the foundation of high-performance queries. We've already looked at the data structures associated with indexes,...
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Persistent data store – mysql
February 5, 2024
by Amanda Ochoa
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In most enterprise development or Web development, social data is stored and retrieved. There are two basic methods for storing data. File System Database File...
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Remember once when MySQL was migrated and upgraded from MySQL5.6 to 5.7 and queries were dozens of times slower
February 5, 2024
by Dhanuk Divan
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Because production data quantity is more and more big, more and more customers, project function more and more, the project itself is also more and...
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MariaDB (MySQL) for Fedora
February 5, 2024
by Millie Porter
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MariaDB is a separate community maintained version of MySQL that forks and is a perfect substitute for MySQL. This article explains how to install and...
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How does Mysql guarantee atomicity and persistence
February 5, 2024
by Nayantara Devan
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Transactions feature Atomicity, Consistency, Isolation, persistence, etc. They achieve generally as follows: Atomicity of transactions is via undo log
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How to completely solve a MySQL Bug from scratch
February 5, 2024
by Tracey Bailey
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Huawei Cloud GaussDB passes several rounds of rigorous test cases before each product is released. It was during this rigorous validation process that we discovered...
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MySQL > select count(*), count(1), count(col)
February 5, 2024
by 彭家豪
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Count (*), count(1), and count(col) may confuse you. Count Function Count (expression) : Returns the total number of queried records,
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The most complete Explain summary, SQL optimization is no longer difficult!
February 5, 2024
by Claudia Chapman
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The article was first published on the public account (yuebanfeiyu), and then synchronized to the personal website: https://xiaoflyfish.cn/ wechat search: Yuebanfeiyu, make a friend, into...
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MySQL8 Logs with Backup 1- Other database logs
February 5, 2024
by Ricky Kerr-Fletcher
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MySQL has binary logs, error logs, general query logs, and slow query logs, which are also commonly used. MySQL 8 adds two new types of...
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Talk about Mysql data storage
February 5, 2024
by Manikya Goswami
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Mysql with its good performance, easy to use, free and open source advantages by developers love. There are many excellent articles about Mysql on the...
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Mysql has four isolation levels
February 5, 2024
by Heather Montgomery
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There are four isolation levels for mysql transactions: READ UNCOMMITTED READ COMMITTED READ REPEATABLE READ SERIALIZABLE
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The intern asked me: Is explain important?
February 5, 2024
by Debra Sampson
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Hello, guys. Today I'm going to talk to you about a very basic MySQL command -- explain. This is a command that many of you...
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MySQL8 Log and Backup 2- Primary/secondary replication
February 5, 2024
by 洪冠霖
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The overview and principle of master-slave replication, the architecture of one master-slave replication and double master-slave replication, and the data consistency of master-slave synchronization are...
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Crush the MySQL index question in the interview
February 5, 2024
by Mehul Rama
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This is the fourth article illustrating MySQL. This article will give you a thorough understanding of the relationship between B+ trees and indexes. Thorough understanding...
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Implementation and advantages and disadvantages of MySQL parallel replication
February 5, 2024
by Ms. Jennifer Byrne
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The topic of "MySQL parallel replication" has been brought up again recently because some developers feel that "5.7 parallel replication has finally solved the problem...
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Mysql database master/slave replication (docker)
February 5, 2024
by Mr. Gary Morris
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Record the File and Position fields shown here, which need to be used by the slave server. The values of the two fields here are...
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MySQL 10 – Indexed data structures, from binary trees to B+ trees
February 5, 2024
by Tushar Chopra
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Hello, everyone, I am Wang Lao shi, index enables us to learn a very core database ability, but also for our SQL optimization and improve...
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MySQL team development specifications used by various factories, too detailed, recommended collection!
February 5, 2024
by Tamara Foster
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Database object naming convention Database object Database object Global naming convention Database naming convention Table naming convention Field naming convention Index naming convention View naming...
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MySQL binary log replication, GTID replication, and semi-synchronous replication
February 5, 2024
by Faiyaz Dugar
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The MySQL binary log is the basis for primary/secondary replication. It records all changes to the MySQL database, including additions, deletions, changes, searches, and table...
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Understand the concurrency behind database transactions
February 5, 2024
by Mr. Maurice Page
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This paper mainly discusses the concurrency principle behind database transactions by connecting 9 kinds of locks, 3 kinds of reads and 4 kinds of isolation...
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Xtrabackup Incremental backup + full backup
February 5, 2024
by 胡欣怡
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The native environment centos6.5 IP: 192.168.117.1291. Links to download the installation package: https://www.percona.com/downloads/XtraBackup/LATEST/2. Download completed
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It’s coming, it’s coming, the new MySQL + MyBatis version of the student management system is coming
February 4, 2024
by Jessica Elliott
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I wrote an article about the Java SE version of the student achievement management system and found it was well received. At the same time,...
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MySQL8 transaction log undo log
February 4, 2024
by Roger Ward
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Redo log is a guarantee of transaction persistence, undo log is a guarantee of transaction atomicity. This article mainly introduces the function, storage structure and...
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High – level SQL: line comparison
February 4, 2024
by Christina Gutierrez
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Environment Preparing database version: MySQL 5.7.20-log Creating a table SQL initializing data Preparing 769,063 items of data Background Service organizations sell products. One service organization...
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Mysql 🚀 a master and many slave architecture
February 4, 2024
by Melissa Wong
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Primary/secondary advantages Avoiding database single point of failure: The primary server replicates data to the secondary server in real time and asynchronously. When the primary...
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MySQL8 Indexing and Tuning 8- Design specifications for databases
February 4, 2024
by Tanya Krishnamurthy
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Database design specification, including the first, two, three and four, five paradigms and their corresponding cases, as well as ER model and data table design...
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