Ng Wee Thia Joel

The Tale of The Mysterious 100% CPU Utilization & The Ruby on Rails Database Reaper

30 Jul 2020

The Story

Two days ago I was looking at the graphs of my EC2 instances on AWS and I noticed that all of the instances in my development environment were stuck at 100% CPU utilization.

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How To Upgrade PostgreSQL RDS Without Downtime (Almost)

03 Jul 2020

The Story

I few months ago I was presented with the task of trying to find a way to upgrade our ancient RDS instance from PostgreSQL 9.4 to 9.5 without any downtime.

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