Couple of older (IBM 8cpu/15GB ram) test servers experience swap full usage, running 18.04 LTS. Each server holding 11 containers 14.04 LTS and 18.04 LTS
Ram usage is around 5GB. SWAP 3.2/4GB vm.swappiness=30. This happens after full container export every night. During day I reboot containers and SWAP usage goes down to 200MB and holding until container export.
Is this normal?