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Troubleshooting correlated subqueries performance in MySQL

Correlated subqueries in MySQL can be slow because they require the subquery to be executed for each row in the outer query. This means that the subquery is executed repeatedly, and the results are used […]

How invisible indexes in MySQL 8 work?

In MySQL 8, invisible indexes are a feature that allows you to create an index without it being used by the optimizer. This can be useful in situations where you want to test the impact […]

Linear Trees in InnoDB

Introduction In InnoDB, a linear tree is a type of data structure used for indexing and searching data. Linear trees are also known as B+ trees. The key characteristic of a linear tree is that […]

Explaining the MySQL Slow Query Log – How to Read and Interpret Slow Query Log?

The MySQL Slow Query Log is a feature that logs SQL statements that exceed a certain threshold of execution time. This log can be used to identify slow queries and to optimize their performance. Here […]

How to implement bulk transactions with RESTful CRUD API using MySQL and Spring Boot?

Implementing bulk transactions with a RESTful CRUD API using MySQL and Spring Boot can be done by using the Spring Data JPA framework and its EntityManager class. Here are the general steps to implement bulk […]

Detailed explanation for higher than expected Disk I/O on MySQL Hot Tables

MySQL Hot Tables are tables that experience a high volume of traffic and activity, and can quickly become a bottleneck for database performance. When you see higher than expected disk I/O on MySQL Hot Tables, […]

How to prevent Replication Break in MySQL while adding INDEX/COLUMN using PT-OSC (pt-online-schema-change)?

When adding indexes or columns in MySQL, it is important to be aware of the potential for replication to break. One way to prevent this is to use a tool like pt-online-schema-change from the Percona […]

How MySQL 8 reduced contention for metadata locks?

MySQL 8 introduced several improvements to reduce contention for metadata locks, which are locks that are used to manage access to database objects such as tables and indexes. Here are a few ways in which […]

How invisible indexes in MySQL 8 works?

In MySQL 8, invisible indexes are a feature that allows you to create an index without it being used by the optimizer. This can be useful in situations where you want to test the impact […]

What happens to uncommitted transactions in MySQL if the server crashes after the update?

In MySQL, if the server crashes after an update and the transaction was not committed, the changes made by the transaction will be rolled back during the crash recovery process. This is because MySQL uses […]

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