When upgrading from Checkmk 2.3 Raw to Checkmk 2.5 Community, we immediately noticed one thing: memory usage had increased considerably. Our monitoring VM had only 2 GB of RAM, and initially we wanted to keep it that way. The installation monitors around 20 hosts and more than 1,000 services. The web interface is normally used … Read more
🔍 The Strange Write Load While investigating unexpectedly high SSD wear on a Proxmox cluster, I found something surprising: several otherwise quiet Debian VMs were writing tens of gigabytes per day. The pattern was suspiciously regular. VMs checked every two minutes were writing around 65–67 GiB per day. Systems checked every five minutes were closer … Read more
Thirty-Five Years in the Machine — and Why I Left 🏭 Inside the Machine I have been inside the machine for thirty-five years. Not on the periphery. Not as an observer. Inside — where decisions are made that shape products used by billions, where projects worth hundreds of millions live and die in conference rooms, … Read more
