systemd.slice(5)
NAME
systemd.slice - Slice unit configuration
SYNOPSIS
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.
Note that slice units cannot be templated, nor is possible to add
multiple names to a slice unit by creating additional symlinks to it.
By default, service and scope units are placed in system.slice, virtual
machines and containers registered with systemd-machined(1) are found
in machine.slice, and user sessions handled by systemd-logind(1) in
user.slice. See systemd.special(5) 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[1] 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 in the "[Unit]" section, 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
systemd(1), systemd.unit(5), systemd.resource-control(5),
systemd.service(5), systemd.scope(5), systemd.special(7),
systemd.directives(7)
NOTES
1. New Control Group Interfaces
http://www.freedesktop.org/wiki/Software/systemd/ControlGroupInterface/
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