Recent Articles - Databases

Calculating Table Size in MySQL

Sep 15, 2022 · 3 min read

Knowing how much disk space individual tables take up is important for DB maintenance and debugging, and it can be accomplished with a single query in MySQL.


The Dangers of OFFSET With MySQL

Jul 28, 2022 · 14 min read

Large limit offsets degrade the performance of most databases, but it is especially egregious in MySQL.


Deferrable Constraints in PostgreSQL

Jun 20, 2022 · 9 min read

Constraints in PostgreSQL are validated immediately row-by-row by default, which might be confusing when updating multiple values in columns that have a uniqueness constraint.


Investigating Locks in MySQL

Jun 17, 2022 · 8 min read

Locking is an important part of an ACID-compliant database, but excessive locks can lead to performance degradation. Here are some strategies for investigating locks in MySQL.


Inner vs. Outer Joins

Apr 29, 2022 · 7 min read

They can't be used interchangeably, and the differences are important.


Creating a MySQL Playground in Docker

Apr 27, 2022 · 4 min read

It's helpful to have local throwaway environments for rapid development, especially with databases, and creating one for MySQL is a snap with Docker.


Creating a PostgreSQL Playground in Docker

Apr 27, 2022 · 3 min read

It's helpful to have local throwaway environments for rapid development, especially with databases, and creating one for PostgreSQL is a snap with Docker.


Creating a Gremlin Playground in Docker

Apr 22, 2022 · 4 min read

Apache TinkerPop's Gremlin graph traversal language can be confusing to learn, but thankfully TinkerPop provides some "toy" graphs perfect to learn with.


Finding Long-Running Queries in MySQL

Dec 22, 2021 · 4 min read

Poorly optimized queries and excessive connections can cause problems in MySQL, here's a quick way to identify and kill them.


Finding Long-Running Queries in PostgreSQL

Nov 26, 2021 · 2 min read

Poorly optimized queries and excessive connections can cause problems in PostgreSQL, here's a quick way to identify and kill them.


Calculating Table Size in PostgreSQL

Nov 26, 2021 · 2 min read

Knowing how much disk space individual tables take up is important for DB maintenance and debugging, and it can be accomplished with a single query in PostgreSQL.


Making UUIDs More Performant in MySQL

Nov 14, 2020 · 3 min read

MySQL does not have a native UUID type, so strings are often used instead, which come with large storage and performance costs.