DOCKER(1)                     Docker User Manuals                    DOCKER(1)



NAME
       docker-container-update - Update configuration of one or more
       containers



SYNOPSIS
       docker container update [OPTIONS] CONTAINER [CONTAINER...]



DESCRIPTION
       The docker container update command dynamically updates container
       configuration.  You can use this command to prevent containers from
       consuming too many resources from their Docker host.  With a single
       command, you can place limits on a single container or on many. To
       specify more than one container, provide space-separated list of
       container names or IDs.



OPTIONS
memory
       Memory limit (format: <number>[<unit>], where unit = b, k, m or g)


       Note that the memory should be smaller than the already set swap memory
       limit.  If you want update a memory limit bigger than the already set
       swap memory limit, you should update swap memory limit at the same
       time. If you don't set swap memory limit on docker create/run but only
       memory limit, the swap memory is double the memory limit.



EXAMPLES
       The following sections illustrate ways to use this command.


   Update a container's cpu-shares
       To limit a container's cpu-shares to 512, first identify the container
       name or ID. You can use docker ps to find these values. You can also
       use the ID returned from the docker run command.  Then, do the
       following:

       $ docker container update --cpu-shares 512 abebf7571666


   Update a container with cpu-shares and memory
       To update multiple resource configurations for multiple containers:

       $ docker container update --cpu-shares 512 -m 300M abebf7571666 hopeful_morse


   Update a container's restart policy
       You can change a container's restart policy on a running container. The
       new restart policy takes effect instantly after you run docker
       container update on a container.


       To update restart policy for one or more containers:

       $ docker container update --restart=on-failure:3 abebf7571666 hopeful_morse


       Note that if the container is started with "--rm" flag, you cannot
       update the restart policy for it. The AutoRemove and RestartPolicy are
       mutually exclusive for the container.



OPTIONS
       --blkio-weight=0    Block IO (relative weight), between 10 and 1000, or
       0 to disable (default 0)


       --cpu-period=0      Limit CPU CFS (Completely Fair Scheduler) period


       --cpu-quota=0  Limit CPU CFS (Completely Fair Scheduler) quota


       --cpu-rt-period=0   Limit the CPU real-time period in microseconds


       --cpu-rt-runtime=0  Limit the CPU real-time runtime in microseconds


       -c, --cpu-shares=0  CPU shares (relative weight)


       --cpus=   Number of CPUs


       --cpuset-cpus=""    CPUs in which to allow execution (0-3, 0,1)


       --cpuset-mems=""    MEMs in which to allow execution (0-3, 0,1)


       -m, --memory=0      Memory limit


       --memory-reservation=0   Memory soft limit


       --memory-swap=0     Swap limit equal to memory plus swap: -1 to enable
       unlimited swap


       --pids-limit=0      Tune container pids limit (set -1 for unlimited)


       --restart=""   Restart policy to apply when a container exits



SEE ALSO
       docker-container(1)

Docker Community                   Aug 2026                          DOCKER(1)