cgroups: Add metric for number of processes in cgroup
In order to have more visibility into how cgroups perform, add a metric to keep track of how many processes are under each cgroup. This will help us determine how many cgroups to create.
In order to have more visibility into how cgroups perform, add a metric to keep track of how many processes are under each cgroup. This will help us determine how many cgroups to create.