So far, you may have noticed how much memory needed for running MariaDB

services $($as the $$free$$ command shows in the practicing part$)$ is way larger than $5$MB or $5,242,880$

bytes $($which is the memory limit we set for the lowMem group in step $5$ and $6$ in the practicing

part$),$ however, the MariaDB processes were still executed successfully. In addition, when we set

the memory limit down to $20,000$ bytes $($in step $1)$ and $2)$ in this part$),$ the OOM was triggered and

some processes seem to be killed, the MariaDB processes were still executed successfully. Do you

have any theory to explain why the MariaDB processes were executed successfully regardless of

whether the OOM was triggered? $($Hints: Which process$($es$)$ were killed by the OOM when the

OOM was triggered? Are these processes the MariaDB processes? Did the command $$cgexec $-$g

memory:lowMem systemctl start mariadb$$ truly add memory restriction on the mariadb

processes? If not, which process was restricted by the command?$)$