When starting a Redis service on Aiven console, you may notice on Logs the following warning
# WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
This warning can be safely ignored as Aiven for Redis ensures that the available memory will never drop low enough to hit this particular failure case.