mirror of https://github.com/docker/cli.git
167 lines
8.2 KiB
Markdown
167 lines
8.2 KiB
Markdown
---
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title: "stats"
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description: "The stats command description and usage"
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keywords: "container, resource, statistics"
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---
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# stats
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```markdown
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Usage: docker stats [OPTIONS] [CONTAINER...]
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Display a live stream of container(s) resource usage statistics
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Options:
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-a, --all Show all containers (default shows just running)
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--format string Pretty-print images using a Go template
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--help Print usage
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--no-stream Disable streaming stats and only pull the first result
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--no-trunc Don't truncate output
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```
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## Description
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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.
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If you want more detailed information about a container's resource usage, use the `/containers/(id)/stats` API endpoint.
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> **Note**: On Linux, the Docker CLI reports memory usage by subtracting page 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 page cache so that clients can use the data as needed.
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> **Note**: The `PIDS` column 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 the `PIDS` column combined with a small number of processes (as reported by `ps` or `top`) may indicate that something in the container is creating many threads.
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## Examples
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Running `docker stats` on all running containers against a Linux daemon.
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```bash
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$ docker stats
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CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
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b95a83497c91 awesome_brattain 0.28% 5.629MiB / 1.952GiB 0.28% 916B / 0B 147kB / 0B 9
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67b2525d8ad1 foobar 0.00% 1.727MiB / 1.952GiB 0.09% 2.48kB / 0B 4.11MB / 0B 2
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e5c383697914 test-1951.1.kay7x1lh1twk9c0oig50sd5tr 0.00% 196KiB / 1.952GiB 0.01% 71.2kB / 0B 770kB / 0B 1
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4bda148efbc0 random.1.vnc8on831idyr42slu578u3cr 0.00% 1.672MiB / 1.952GiB 0.08% 110kB / 0B 578kB / 0B 2
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```
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If you don't [specify a format string using `--format`](#formatting), the
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following columns are shown.
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| Column name | Description |
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|---------------------------|-----------------------------------------------------------------------------------------------|
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| `CONTAINER ID` and `Name` | the ID and name of the container |
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| `CPU %` and `MEM %` | the percentage of the host's CPU and memory the container is using |
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| `MEM USAGE / LIMIT` | the total memory the container is using, and the total amount of memory it is allowed to use |
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| `NET I/O` | The amount of data the container has sent and received over its network interface |
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| `BLOCK I/O` | The amount of data the container has read to and written from block devices on the host |
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| `PIDs` | the number of processes or threads the container has created |
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Running `docker stats` on multiple containers by name and id against a Linux daemon.
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```bash
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$ docker stats awesome_brattain 67b2525d8ad1
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CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS
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b95a83497c91 awesome_brattain 0.28% 5.629MiB / 1.952GiB 0.28% 916B / 0B 147kB / 0B 9
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67b2525d8ad1 foobar 0.00% 1.727MiB / 1.952GiB 0.09% 2.48kB / 0B 4.11MB / 0B 2
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```
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Running `docker stats` with customized format on all (Running and Stopped) containers.
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```bash
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$ docker stats --all --format "table {{.Container}}\t{{.CPUPerc}}\t{{.MemUsage}}" fervent_panini 5acfcb1b4fd1 drunk_visvesvaraya big_heisenberg
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CONTAINER CPU % MEM USAGE / LIMIT
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fervent_panini 0.00% 56KiB / 15.57GiB
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5acfcb1b4fd1 0.07% 32.86MiB / 15.57GiB
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drunk_visvesvaraya 0.00% 0B / 0B
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big_heisenberg 0.00% 0B / 0B
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```
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`drunk_visvesvaraya` and `big_heisenberg` are stopped containers in the above example.
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Running `docker stats` on all running containers against a Windows daemon.
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```powershell
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PS E:\> docker stats
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CONTAINER ID CPU % PRIV WORKING SET NET I/O BLOCK I/O
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09d3bb5b1604 6.61% 38.21 MiB 17.1 kB / 7.73 kB 10.7 MB / 3.57 MB
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9db7aa4d986d 9.19% 38.26 MiB 15.2 kB / 7.65 kB 10.6 MB / 3.3 MB
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3f214c61ad1d 0.00% 28.64 MiB 64 kB / 6.84 kB 4.42 MB / 6.93 MB
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```
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Running `docker stats` on multiple containers by name and id against a Windows daemon.
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```powershell
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PS E:\> docker ps -a
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CONTAINER ID NAME IMAGE COMMAND CREATED STATUS PORTS NAMES
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3f214c61ad1d awesome_brattain nanoserver "cmd" 2 minutes ago Up 2 minutes big_minsky
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9db7aa4d986d mad_wilson windowsservercore "cmd" 2 minutes ago Up 2 minutes mad_wilson
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09d3bb5b1604 fervent_panini windowsservercore "cmd" 2 minutes ago Up 2 minutes affectionate_easley
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PS E:\> docker stats 3f214c61ad1d mad_wilson
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CONTAINER ID NAME CPU % PRIV WORKING SET NET I/O BLOCK I/O
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3f214c61ad1d awesome_brattain 0.00% 46.25 MiB 76.3 kB / 7.92 kB 10.3 MB / 14.7 MB
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9db7aa4d986d mad_wilson 9.59% 40.09 MiB 27.6 kB / 8.81 kB 17 MB / 20.1 MB
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```
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### Formatting
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The formatting option (`--format`) pretty prints container output
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using a Go template.
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Valid placeholders for the Go template are listed below:
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Placeholder | Description
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------------ | --------------------------------------------
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`.Container` | Container name or ID (user input)
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`.Name` | Container name
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`.ID` | Container ID
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`.CPUPerc` | CPU percentage
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`.MemUsage` | Memory usage
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`.NetIO` | Network IO
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`.BlockIO` | Block IO
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`.MemPerc` | Memory percentage (Not available on Windows)
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`.PIDs` | Number of PIDs (Not available on Windows)
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When using the `--format` option, the `stats` command either
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outputs the data exactly as the template declares or, when using the
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`table` directive, includes column headers as well.
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The following example uses a template without headers and outputs the
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`Container` and `CPUPerc` entries separated by a colon for all images:
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```bash
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$ docker stats --format "{{.Container}}: {{.CPUPerc}}"
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09d3bb5b1604: 6.61%
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9db7aa4d986d: 9.19%
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3f214c61ad1d: 0.00%
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```
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To list all containers statistics with their name, CPU percentage and memory
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usage in a table format you can use:
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```bash
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$ docker stats --format "table {{.Container}}\t{{.CPUPerc}}\t{{.MemUsage}}"
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CONTAINER CPU % PRIV WORKING SET
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1285939c1fd3 0.07% 796 KiB / 64 MiB
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9c76f7834ae2 0.07% 2.746 MiB / 64 MiB
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d1ea048f04e4 0.03% 4.583 MiB / 64 MiB
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```
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The default format is as follows:
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On Linux:
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"table {{.ID}}\t{{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.MemPerc}}\t{{.NetIO}}\t{{.BlockIO}}\t{{.PIDs}}"
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On Windows:
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"table {{.ID}}\t{{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.NetIO}}\t{{.BlockIO}}"
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> **Note**: On Docker 17.09 and older, the `{{.Container}}` column was used,
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> instead of `{{.ID}}\t{{.Name}}`.
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