The eighteenth installment of Lennart Poettering's "systemd for Administrators" series covers an interesting newish feature: integrated support for control group resource controllers. "When thinking about service management for systemd, we quickly realized that resource management must be core functionality of it. In a modern world -- regardless if server or embedded -- controlling CPU, Memory, and IO resources of the various services cannot be an afterthought, but must be built-in as first-class service settings. And it must be per-service and not per-process as the traditional nice values or POSIX Resource Limits were."
Followers of the series may also want to take a peek at Part XVII, covering management of the journal.