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@@ -2,7 +2,7 @@
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+++
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title = "Runtime metrics"
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description = "Measure the behavior of running containers"
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-keywords = ["docker, metrics, CPU, memory, disk, IO, run, runtime"]
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+keywords = ["docker, metrics, CPU, memory, disk, IO, run, runtime, stats"]
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[menu.main]
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parent = "smn_administrate"
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weight = 4
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@@ -11,6 +11,26 @@ weight = 4
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# Runtime metrics
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+
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+## Docker stats
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+
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+You can use the `docker stats` command to live stream a container's
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+runtime metrics. The command supports CPU, memory usage, memory limit,
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+and network IO metrics.
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+
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+The following is a sample output from the `docker stats` command
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+
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+ $ docker stats redis1 redis2
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+ CONTAINER CPU % MEM USAGE/LIMIT MEM % NET I/O
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+ redis1 0.07% 796 KB/64 MB 1.21% 788 B/648 B
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+ redis2 0.07% 2.746 MB/64 MB 4.29% 1.266 KB/648 B
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+
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+
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+The [docker stats](/reference/commandline/stats/) reference page has
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+more details about the `docker stats` command.
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+
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+## Control groups
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+
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Linux Containers rely on [control groups](
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https://www.kernel.org/doc/Documentation/cgroups/cgroups.txt)
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which not only track groups of processes, but also expose metrics about
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@@ -18,8 +38,6 @@ CPU, memory, and block I/O usage. You can access those metrics and
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obtain network usage metrics as well. This is relevant for "pure" LXC
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containers, as well as for Docker containers.
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-## Control groups
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-
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Control groups are exposed through a pseudo-filesystem. In recent
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distros, you should find this filesystem under `/sys/fs/cgroup`. Under
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that directory, you will see multiple sub-directories, called devices,
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Ankush Agarwal