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CentOS 7.0 - man page for systemd-cgtop (centos section 1)

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

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

       systemd-cgtop [OPTIONS...]

       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.

       The following options are understood:

       -h, --help
	   Prints a short help text and exits.

	   Prints a version string and exits.

	   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.

       -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).

	   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.

       systemd-cgtop 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,

	   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.

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

systemd 208									 SYSTEMD-CGTOP(1)

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