9.1 KiB
| title | description | keywords |
|---|---|---|
| stats | The stats command description and usage | container, resource, statistics |
stats
Usage: docker stats [OPTIONS] [CONTAINER...]
Display a live stream of container(s) resource usage statistics
Aliases:
docker container stats, docker stats
Options:
-a, --all Show all containers (default shows just running)
--format string Pretty-print images using a Go template
--help Print usage
--no-stream Disable streaming stats and only pull the first result
--no-trunc Don't truncate output
Description
The docker stats command returns a live data stream for running containers. To
limit data to one or more specific containers, specify a list of container names
or ids separated by a space. You can specify a stopped container but stopped
containers do not return any data.
If you need more detailed information about a container's resource usage, use
the /containers/(id)/stats API endpoint.
Note
On Linux, the Docker CLI reports memory usage by subtracting cache usage from the total memory usage. The API does not perform such a calculation but rather provides the total memory usage and the amount from the cache so that clients can use the data as needed. The cache usage is defined as the value of
total_inactive_filefield in thememory.statfile on cgroup v1 hosts.On Docker 19.03 and older, the cache usage was defined as the value of
cachefield. On cgroup v2 hosts, the cache usage is defined as the value ofinactive_filefield.
Note
The
PIDScolumn contains the number of processes and kernel threads created by that container. Threads is the term used by Linux kernel. Other equivalent terms are "lightweight process" or "kernel task", etc. A large number in thePIDScolumn combined with a small number of processes (as reported bypsortop) may indicate that something in the container is creating many threads.
Examples
Running docker stats on all running containers against a Linux daemon.
$ docker stats
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
b95a83497c91 awesome_brattain 0.28% 5.629MiB / 1.952GiB 0.28% 916B / 0B 147kB / 0B 9
67b2525d8ad1 foobar 0.00% 1.727MiB / 1.952GiB 0.09% 2.48kB / 0B 4.11MB / 0B 2
e5c383697914 test-1951.1.kay7x1lh1twk9c0oig50sd5tr 0.00% 196KiB / 1.952GiB 0.01% 71.2kB / 0B 770kB / 0B 1
4bda148efbc0 random.1.vnc8on831idyr42slu578u3cr 0.00% 1.672MiB / 1.952GiB 0.08% 110kB / 0B 578kB / 0B 2
If you don't specify a format string using --format, the
following columns are shown.
| Column name | Description |
|---|---|
CONTAINER ID and Name |
the ID and name of the container |
CPU % and MEM % |
the percentage of the host's CPU and memory the container is using |
MEM USAGE / LIMIT |
the total memory the container is using, and the total amount of memory it is allowed to use |
NET I/O |
The amount of data the container has received and sent over its network interface |
BLOCK I/O |
The amount of data the container has written to and read from block devices on the host |
PIDs |
the number of processes or threads the container has created |
Running docker stats on multiple containers by name and id against a Linux daemon.
$ docker stats awesome_brattain 67b2525d8ad1
CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
b95a83497c91 awesome_brattain 0.28% 5.629MiB / 1.952GiB 0.28% 916B / 0B 147kB / 0B 9
67b2525d8ad1 foobar 0.00% 1.727MiB / 1.952GiB 0.09% 2.48kB / 0B 4.11MB / 0B 2
Running docker stats on container with name nginx and getting output in json format.
$ docker stats nginx --no-stream --format "{{ json . }}"
{"BlockIO":"0B / 13.3kB","CPUPerc":"0.03%","Container":"nginx","ID":"ed37317fbf42","MemPerc":"0.24%","MemUsage":"2.352MiB / 982.5MiB","Name":"nginx","NetIO":"539kB / 606kB","PIDs":"2"}
Running docker stats with customized format on all (Running and Stopped) containers.
$ docker stats --all --format "table {{.Container}}\t{{.CPUPerc}}\t{{.MemUsage}}" fervent_panini 5acfcb1b4fd1 drunk_visvesvaraya big_heisenberg
CONTAINER CPU % MEM USAGE / LIMIT
fervent_panini 0.00% 56KiB / 15.57GiB
5acfcb1b4fd1 0.07% 32.86MiB / 15.57GiB
drunk_visvesvaraya 0.00% 0B / 0B
big_heisenberg 0.00% 0B / 0B
drunk_visvesvaraya and big_heisenberg are stopped containers in the above example.
Running docker stats on all running containers against a Windows daemon.
PS E:\> docker stats
CONTAINER ID CPU % PRIV WORKING SET NET I/O BLOCK I/O
09d3bb5b1604 6.61% 38.21 MiB 17.1 kB / 7.73 kB 10.7 MB / 3.57 MB
9db7aa4d986d 9.19% 38.26 MiB 15.2 kB / 7.65 kB 10.6 MB / 3.3 MB
3f214c61ad1d 0.00% 28.64 MiB 64 kB / 6.84 kB 4.42 MB / 6.93 MB
Running docker stats on multiple containers by name and id against a Windows daemon.
PS E:\> docker ps -a
CONTAINER ID NAME IMAGE COMMAND CREATED STATUS PORTS NAMES
3f214c61ad1d awesome_brattain nanoserver "cmd" 2 minutes ago Up 2 minutes big_minsky
9db7aa4d986d mad_wilson windowsservercore "cmd" 2 minutes ago Up 2 minutes mad_wilson
09d3bb5b1604 fervent_panini windowsservercore "cmd" 2 minutes ago Up 2 minutes affectionate_easley
PS E:\> docker stats 3f214c61ad1d mad_wilson
CONTAINER ID NAME CPU % PRIV WORKING SET NET I/O BLOCK I/O
3f214c61ad1d awesome_brattain 0.00% 46.25 MiB 76.3 kB / 7.92 kB 10.3 MB / 14.7 MB
9db7aa4d986d mad_wilson 9.59% 40.09 MiB 27.6 kB / 8.81 kB 17 MB / 20.1 MB
Format the output (--format)
The formatting option (--format) pretty prints container output
using a Go template.
Valid placeholders for the Go template are listed below:
| Placeholder | Description |
|---|---|
.Container |
Container name or ID (user input) |
.Name |
Container name |
.ID |
Container ID |
.CPUPerc |
CPU percentage |
.MemUsage |
Memory usage |
.NetIO |
Network IO |
.BlockIO |
Block IO |
.MemPerc |
Memory percentage (Not available on Windows) |
.PIDs |
Number of PIDs (Not available on Windows) |
When using the --format option, the stats command either
outputs the data exactly as the template declares or, when using the
table directive, includes column headers as well.
The following example uses a template without headers and outputs the
Container and CPUPerc entries separated by a colon (:) for all images:
$ docker stats --format "{{.Container}}: {{.CPUPerc}}"
09d3bb5b1604: 6.61%
9db7aa4d986d: 9.19%
3f214c61ad1d: 0.00%
To list all containers statistics with their name, CPU percentage and memory usage in a table format you can use:
$ docker stats --format "table {{.Container}}\t{{.CPUPerc}}\t{{.MemUsage}}"
CONTAINER CPU % PRIV WORKING SET
1285939c1fd3 0.07% 796 KiB / 64 MiB
9c76f7834ae2 0.07% 2.746 MiB / 64 MiB
d1ea048f04e4 0.03% 4.583 MiB / 64 MiB
The default format is as follows:
On Linux:
"table {{.ID}}\t{{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.MemPerc}}\t{{.NetIO}}\t{{.BlockIO}}\t{{.PIDs}}"
On Windows:
"table {{.ID}}\t{{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.NetIO}}\t{{.BlockIO}}"