Descriptionsystemd-analyze may be used
- to determine system boot-up performance of the current
- boot.
+ to determine system boot-up performance statistics and
+ retrieve other state and tracing information from the
+ system and service manager.
systemd-analyze time
prints the time spent in the kernel before
userspace has been reached, the time spent in the
initial RAM disk (initrd) before normal system
- userspace has been reached and the time normal system
+ userspace has been reached, and the time normal system
userspace took to initialize. Note that these
measurements simply measure the time passed up to the
point where all system services have been spawned, but
@@ -111,7 +124,7 @@
of another service to complete.systemd-analyze critical-chain [UNIT...]
- prints a tree of the time critical chain of units
+ prints a tree of the time-critical chain of units
(for each of the specified UNITs
or for the default target otherwise).
The time after the unit is active or started is printed
@@ -127,7 +140,7 @@
been started at what time, highlighting the time they
spent on initialization.
- systemd-analyze dot Generate
+ systemd-analyze dot generates
textual dependency graph description in dot format for
further processing with the GraphViz
dot1
@@ -135,7 +148,7 @@
dot | dot -Tsvg > systemd.svg to generate a
graphical dependency tree. Unless
or
- is passed the generated graph will show both ordering
+ is passed, the generated graph will show both ordering
and requirement dependencies. Optional pattern
globbing style specifications
(e.g. *.target) may be given at
@@ -143,7 +156,21 @@
any of these patterns match either the origin or
destination node.
- If no command is passed systemd-analyze
+ systemd-analyze dump outputs
+ a (usually very long) human-readable serialization of
+ the complete server state. Its format is subject to
+ change without notice and should not be parsed by
+ applications.
+
+ systemd-analyze set-log-level
+ LEVEL changes the
+ current log level of the systemd
+ daemon to LEVEL (accepts
+ the same values as
+ described in
+ systemd1).
+
+ If no command is passed, systemd-analyze
time is implied.
@@ -170,6 +197,36 @@
manager.
+
+
+
+ Shows performance data
+ of the system manager. This is the
+ implied default.
+
+
+
+
+
+
+ Execute the operation
+ remotely. Specify a hostname, or
+ username and hostname separated by
+ @, to connect
+ to. This will use SSH to talk to the
+ remote machine manager
+ instance.
+
+
+
+
+
+
+ Execute the operation on a
+ local container. Specify a container
+ name to connect to.
+
+
@@ -179,19 +236,19 @@
dot command (see
above), selects which dependencies are
shown in the dependency graph. If
- is passed
+ is passed,
only dependencies of type
After= or
Before= are
shown. If
- is passed only dependencies of type
+ is passed, only dependencies of type
Requires=,
RequiresOverridable=,
Requisite=,
RequisiteOverridable=,
Wants= and
Conflicts= are
- shown. If neither is passed, shows
+ shown. If neither is passed, this shows
dependencies of all these
types.
@@ -203,16 +260,16 @@
When used in
conjunction with the
dot command (see
- above), selects which relationships
+ above), this selects which relationships
are shown in the dependency graph.
They both require
glob7
patterns as arguments, which are
- matched against lefthand and
- righthand, respectively, nodes of a
+ matched against left-hand and
+ right-hand, respectively, nodes of a
relationship. Each of these can be
- used more than once which means a
- unit name must match one of given
+ used more than once, which means a
+ unit name must match one of the given
values.
@@ -226,7 +283,15 @@
latest unit in the same level. The unit of
timespan is seconds
unless specified with a different unit,
- i.e. "50ms".
+ e.g. "50ms".
+
+
+
+
+
+
+ Do not pipe output into a pager.
+
@@ -235,7 +300,7 @@
Exit status
- On success 0 is returned, a non-zero failure
+ On success, 0 is returned, a non-zero failure
code otherwise.
@@ -243,19 +308,37 @@
ExamplesThis plots all dependencies of any unit whose
- name starts with "avahi-daemon.":
+ name starts with avahi-daemon.:
$ systemd-analyze dot 'avahi-daemon.*' | dot -Tsvg > avahi.svg
$ eog avahi.svgThis plots the dependencies between all known target units:
- systemd-analyze dot --to-pattern='*.target' --from-patter='*.target' | dot -Tsvg > targets.svg
+ systemd-analyze dot --to-pattern='*.target' --from-pattern='*.target' | dot -Tsvg > targets.svg
$ eog targets.svg
+
+ Environment
+
+
+
+ $SYSTEMD_PAGER
+
+
+ Pager to use when is not
+ given; overrides $PAGER. Setting this to
+ an empty string or the value cat is
+ equivalent to passing
+ .
+
+
+
+
+
See Also