Zero Downtime Postgres Major Upgrade: Replacing pg_upgrade with Logical Replication Let's talk about Postgres major upgrades. If you search for solutions, the standard recommendation is almost always pg_upgrade with the –link flag. It is fast, but it is also a binary choice. Once you run it, your old cluster is modified, and your new cluster …
The 'password you never set' prompt isn't a bug — it's pg_hba.conf doing exactly what you told it The moment it happens You just installed PostgreSQL. You followed the getting-started guide, or maybe you didn't — maybe you just ran brew install postgresql or apt install postgresql and typed psql to see what would happen. …
Postgres vs Redis, Mongo, RabbitMQ: The Real Decision Framework I’ve consolidated stacks under a deadline with production on fire. I’ve also ripped Postgres back out six months later and put Redis back where it belonged — on its own instance, doing a single job. No hedging. There’s a sweet spot where a single Postgres database …
Most Postgres performance disasters start with a schema decision nobody thought twice about If you’ve watched the accompanying video, you already know the premise: Postgres rarely blows up in smoke. It bleeds. The query that’s slow today has a root cause that was laid down six months ago in a CREATE TABLE nobody reviewed. The …
Postgres Autovacuum: Why Your Deletes Don’t Free Up Space and What to Do About It If you want the visual walkthrough, there’s a companion video that covers these internals on screen. This article stands entirely on its own—read straight through, and you’ll come away knowing how autovacuum works and what to pay attention to. When …
Managing MySQL storage engines is an essential skill for any database administrator or developer working with MySQL. Storage engines are the components that handle the SQL operations for storing, retrieving, and querying data in your databases. MySQL comes with several storage engines, with InnoDB being the default. Each engine has its unique set of features, …
If you encounter the ORA-01550 error in a distributed transaction in Oracle, it means that the system is unable to extend the rollback segment in a tablespace. This error can occur due to various reasons such as insufficient space in the tablespace, a lack of permissions, or issues with the distributed transaction itself. In this …
If you are encountering the ORA-01288 error in Oracle, it means that the system has run out of transaction table slots for distributed transactions. This error can occur when there are too many open distributed transactions, and the system is unable to allocate additional slots. To diagnose and fix the ORA-01288 error, you can follow …
If you are encountering the ORA-02043 error in Oracle, it means that a transaction has been rolled back due to a deadlock or a timeout. This can be a frustrating issue to deal with, but with the right approach, it can be diagnosed and fixed effectively. Diagnosing the ORA-02043 Error When diagnosing the ORA-02043 error, …
If you are encountering the ORA-01776 error in Oracle, it means that you are trying to modify a parameter, but the specified value is invalid. This error typically occurs when you are trying to alter a parameter using the ALTER SYSTEM command. There are a few different scenarios that can lead to this error, so …