github.com/flavio/docker@v0.1.3-0.20170117145210-f63d1a6eec47/man/src/container/pause.md (about)

     1  The `docker container pause` command suspends all processes in the specified containers.
     2  On Linux, this uses the cgroups freezer. Traditionally, when suspending a process
     3  the `SIGSTOP` signal is used, which is observable by the process being suspended.
     4  With the cgroups freezer the process is unaware, and unable to capture,
     5  that it is being suspended, and subsequently resumed. On Windows, only Hyper-V
     6  containers can be paused.
     7  
     8  See the [cgroups freezer documentation]
     9  (https://www.kernel.org/doc/Documentation/cgroup-v1/freezer-subsystem.txt) for
    10  further details.
    11  
    12  **docker-container-unpause(1)** to unpause all processes within a container.