Gregory's Server
Sergey Kibish
After an upgrade to the next major version of OS on my home server/box I started to observe that it freezes at some point. Iowait on some disks 100%, admin UI not responsive, apps start to die. Only restarting helps. Why this happens?
Context: OS is TrueNAS SCALE Dragonfish-24.04.0; 32GB RAM; 8TB RAIDz1 pool; 250GB nvme stripe for apps; 30GB boot drive SSD.
Maybe disks start to die? No. S.M.A.R.T. passes and other checks do not show that something is wrong.
Memory leak? Nope, all good. No app has stairway to heaven memory behaviour.
Swap is being used despite not all RAM is in use and there is free even free space. Why swap is being used?