Sudden Increase in Swap Usage: Symptoms and Initial Findings This morning, when I connected to my server, I wanted to check the system health before starting my workflow as usual. However, the scene I encountered was far from what I was accustomed to. The htop output showed the mysqld process consuming an abnormally high amount of CPU and RAM, but what really caught my attention was the swap usage reaching almost full capacity. When I checked with the free -h command, I saw that almost the entire system was using swap space. This situation had drastically reduced the server's performance, causing many services to become unresponsive. Normally, swap usage on this server remains at a minimum because I have sufficient RAM, and processes are usually kept in memory. I needed to conduct an in-depth investigation to find the source of this sudden increase. My first reaction was to check if I had made any recent updates. I reviewed the apt history log records for the past week.…