systemd.slice systemd Developer Lennart Poettering lennart@poettering.net systemd.slice 5 systemd.slice Slice unit configuration slice.slice Description A unit configuration file whose name ends in .slice encodes information about a slice which is a concept for hierarchically managing resources of a group of processes. This management is performed by creating a node in the Linux Control Group (cgroup) tree. Units that manage processes (primarily scope and service units) may be assigned to a specific slice. For each slice, certain resource limits may be set that apply to all processes of all units contained in that slice. Slices are organized hierarchically in a tree. The name of the slice encodes the location in the tree. The name consists of a dash-separated series of names, which describes the path to the slice from the root slice. The root slice is named, -.slice. Example: foo-bar.slice is a slice that is located within foo.slice, which in turn is located in the root slice -.slice. By default, service and scope units are placed in system.slice, virtual machines and containers registered with systemd-machined1 are found in machine.slice, and user sessions handled by systemd-logind1 in user.slice. See systemd.special5 for more information. See systemd.unit5 for the common options of all unit configuration files. The common configuration items are configured in the generic [Unit] and [Install] sections. The slice specific configuration options are configured in the [Slice] section. Currently, only generic resource control settings as described in systemd.resource-control5 are allowed. See the New Control Group Interfaces for an introduction on how to make use of slice units from programs. Automatic Dependencies Slice units automatically gain dependencies of type After= and Requires= on their immediate parent slice unit. Unless DefaultDependencies=false is used, slice units will implicitly have dependencies of type Conflicts= and Before= on shutdown.target. These ensure that slice units are removed prior to system shutdown. Only slice units involved with early boot or late system shutdown should disable this option. See Also systemd1, systemd.unit5, systemd.resource-control5, systemd.service5, systemd.scope5, systemd.special7, systemd.directives7