Section: systemd-cgtop (1)
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systemd-cgtop - Show top control groups by their resource usage
shows the top control groups of the local Linux control group hierarchy, ordered by their CPU, memory, or disk I/O load. The display is refreshed in regular intervals (by default every 1s), similar in style to
is not connected to a tty, only one iteration is performed and no columns headers are printed. This mode is suitable for scripting.
Resource usage is only accounted for control groups in the relevant hierarchy, i.e. CPU usage is only accounted for control groups in the
hierarchy, memory usage only for those in
and disk I/O usage for those in
"blkio". If resource monitoring for these resources is required, it is recommended to add the
settings in the unit files in question. See
To emphasize this: unless
are enabled for the services in question, no resource accounting will be available for system services and the data shown by
will be incomplete.
The following options are understood:
Order by control group path name.
Order by number of tasks in control group (i.e. threads and processes).
Order by CPU load.
Order by memory usage.
Order by disk I/O load.
Run in "batch" mode: do not accept input and run until the iteration limit set with
is exhausted or until killed. This mode could be useful for sending output from
to other programs or to a file.
Perform only this many iterations.
Specify refresh delay in seconds (or if one of
is specified as unit in this time unit).
Maximum control group tree traversal depth. Specifies how deep
shall traverse the control group hierarchies. If 0 is specified, only the root group is monitored. For 1, only the first level of control groups is monitored, and so on. Defaults to 3.
Print a short help text and exit.
Print a short version string and exit.
is an interactive tool and may be controlled via user input using the following keys:
Shows a short help text.
Immediately refresh output.
Terminate the program.
p, t, c, m, i
Sort the control groups by path, number of tasks, CPU load, memory usage, or IO load, respectively.
Toggle between showing CPU time as time or percentage.
Increase or decrease refresh delay, respectively.
On success, 0 is returned, a non-zero failure code otherwise.
- EXIT STATUS
- SEE ALSO