MinervaDB Blog: Mastering WebScale Database Infrastructure

PostgreSQL Performance: How to Avoid “OR” for Better Results

Using the OR operator in a SQL query can result in poor performance, especially when used in combination with other operators, such as LIKE, IN, and subqueries. In PostgreSQL, there are several techniques that can […]

MySQL 8 Invisible Indexes: How They 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 […]

InnoDB Linear Tree: Understanding 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 […]

PostgreSQL Partitioned Bitmaps: How to Implement Them

Partitioned Bitmaps are a technique used to speed up queries on large databases by breaking them down into smaller pieces, or partitions, that can be searched independently. PostgreSQL supports Partitioned Bitmaps through the use of […]

PostgreSQL BgWriter Latches: How to Monitor Them

The BgWriter process in PostgreSQL is responsible for flushing dirty pages from the shared buffer pool to disk. As such, it is a critical component of the database system and it is important to monitor […]

Why are PostgreSQL updates getting slower?

UPDATE latency refers to the time taken by PostgreSQL to perform an UPDATE operation on a table. Slow UPDATE operations can negatively impact the overall performance of the database. Here are some steps to troubleshoot […]

PostgreSQL SQL Firewall: Protecting Databases from Cyberattacks

SQL Firewall is a security solution that provides protection against SQL injection attacks by filtering and blocking potentially harmful SQL statements. In PostgreSQL, the pgBouncer connection pooler can be used as an SQL Firewall. To […]

PostgreSQL Inheritance-Based Partitioning to Declarative Partitioning: Migration Guide

Declarative partitioning is a feature in PostgreSQL that allows you to define partitions for a table in a declarative manner, without having to use inheritance. With declarative partitioning, you can define partitioning rules using the […]

RESTful CRUD API MySQL Spring Boot: Implementing Bulk Transactions

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 […]