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-control7 are allowed.
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