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How is hash aggregation implemented in MariaDB?

Hash aggregation is a type of aggregation algorithm used in MariaDB to efficiently calculate aggregate functions such as SUM, COUNT, MAX, and MIN on large data sets. It works by dividing the data into groups […]

What is declarative partitioning in MariaDB? How declarative partitioning benefit MariaDB performance? Monitoring MariaDB partitioning and disk I/O operations

Declarative partitioning in MariaDB is a feature that allows you to divide a table’s data into smaller, more manageable partitions based on a specified partitioning expression. It provides an easy and intuitive way to organize […]

How to avoid “OR” in MariaDB for better performance?

Avoiding the use of the “OR” operator in MariaDB can help improve query performance by reducing the number of rows that need to be scanned and filtered. Here are some strategies to avoid using “OR” […]

How to avoid “OR” in PostgreSQL for better performance?

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 […]

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 Partitioned Bitmaps in PostgreSQL?

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 […]

Monitoring BgWriter latches in PostgreSQL

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 […]