Looks like it's not over.
After I wrote last comment, I caught OOM on my rack machine(with disabled unattended upgrades) and decided to perform apt upgrade and reboot on both controllers. After 3 days, there is OOM on region controller once again(however this time it was burst of memory usage instead of linear leak)
Looks like it's not over.
After I wrote last comment, I caught OOM on my rack machine(with disabled unattended upgrades) and decided to perform apt upgrade and reboot on both controllers. After 3 days, there is OOM on region controller once again(however this time it was burst of memory usage instead of linear leak)