systemd.slice — Slice unit configuration
A unit configuration file whose name ends in "
.slice" encodes information about a slice
unit. A slice unit 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
foo-bar.slice is a slice that is located within
foo.slice, which in turn
is located in the root slice
Note that slice units cannot be templated, nor is possible to add multiple names to a slice unit by creating additional symlinks to its unit file.
By default, service and scope units are placed in
system.slice, virtual machines and containers
are found in
machine.slice, and user sessions
for more information.
See systemd.unit(5) 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-control(5) are allowed.
See the New Control Group Interfaces for an introduction on how to make use of slice units from programs.
The following dependencies are implicitly added:
Slice units automatically gain dependencies of type
their immediate parent slice unit.
The following dependencies are added unless
DefaultDependencies=no is set:
Slice units will automatically have dependencies of type
shutdown.target. These ensure that slice units are removed prior to system shutdown.
Only slice units involved with late system shutdown should disable
Slice unit files may include [Unit] and [Install] sections, which are described in systemd.unit(5). No options specific to this file type are supported.