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SYSTEMD-CGTOP(1)                                    systemd-cgtop                                    SYSTEMD-CGTOP(1)



NAME
       systemd-cgtop - Show top control groups by their resource usage

SYNOPSIS
       systemd-cgtop [OPTIONS...]

DESCRIPTION
       systemd-cgtop 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 top(1). If systemd-cgtop 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 "cpuacct" hierarchy, memory usage only for those in "memory" and disk I/O
       usage for those in "blkio". If resource monitoring for these resources is required, it is recommended to add
       the CPUAccounting=1, MemoryAccounting=1 and BlockIOAccounting=1 settings in the unit files in question. See
       systemd.resource-control(5) for details.

       To emphasize this: unless "CPUAccounting=1", "MemoryAccounting=1" and "BlockIOAccounting=1" are enabled for
       the services in question, no resource accounting will be available for system services and the data shown by
       systemd-cgtop will be incomplete.

OPTIONS
       The following options are understood:

       -p
           Order by control group path name.

       -t
           Order by number of tasks in control group (i.e. threads and processes).

       -c
           Order by CPU load.

       -m
           Order by memory usage.

       -i
           Order by disk I/O load.

       -b, --batch
           Run in "batch" mode: do not accept input and run until the iteration limit set with --iterations is
           exhausted or until killed. This mode could be useful for sending output from systemd-cgtop to other
           programs or to a file.

       -n, --iterations=
           Perform only this many iterations.

       -d, --delay=
           Specify refresh delay in seconds (or if one of "ms", "us", "min" is specified as unit in this time unit).

       --depth=
           Maximum control group tree traversal depth. Specifies how deep systemd-cgtop 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.


       SPACE
           Immediately refresh output.

       q
           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.

EXIT STATUS
       On success, 0 is returned, a non-zero failure code otherwise.

SEE ALSO
       systemd(1), systemctl(1), systemd-cgls(1), systemd.resource-control(5), top(1)



systemd 219                                                                                          SYSTEMD-CGTOP(1)