If -memory-swap is explicitly set to -1, the container is allowed to use Not set, the container can use 600m in total of memory and swap. For instance, if -memory="300m" and -memory-swap is If -memory-swap is unset, and -memory is set, the container can useĪs much swap as the -memory setting, if the host container has swap Set to a positive integer, the container does not have access to swap. If -memory-swap is set to the same value as -memory, and -memory is If -memory-swap is set to 0, the setting is ignored, and the value is So if -memory="300m" and -memory-swap="1g", theĬontainer can use 300m of memory and 700m ( 1g - 300m) swap. Memory and swap that can be used, and -memory controls the amount used by memory-swap represents the total amount of If -memory-swap is set to a positive integer, then both -memory and Its setting can have complicated effects: Performance penalty for applications that swap memory to disk often. When the container has exhausted all the RAM that is available to it. Using swap allows the container to write excess memory requirements to disk memory-swap is a modifier flag that only has meaning if -memory is also
#SPLUNK JOIN LIMIT 50000 FREE#
If the -m flag is not set, the host can run out of memory and the kernel may need to kill the host system’s processes to free memory.įor more information about cgroups and memory in general, see the documentationįor Memory Resource Controller. Only disable the OOM killer on containers where you have also set the -m/-memory option. To change this behavior, use the -oom-kill-disable option. See -kernel-memory details.īy default, if an out-of-memory (OOM) error occurs, the kernel kills processes in a container. Because kernel memory cannot be swapped out, a container which is starved of kernel memory may block host machine resources, which can have side effects on the host machine and on other containers. The maximum amount of kernel memory the container can use. Because it is a soft limit, it does not guarantee that the container doesn’t exceed the limit. If you use -memory-reservation, it must be set lower than -memory for it to take precedence. See -memory-swappiness details.Īllows you to specify a soft limit smaller than -memory which is activated when Docker detects contention or low memory on the host machine. You can set -memory-swappiness to a value between 0 and 100, to tune this percentage. See -memory-swap details.īy default, the host kernel can swap out a percentage of anonymous pages used by a container. The amount of memory this container is allowed to swap to disk. That is, you must set the value to at least 6 megabytes. If you set this option, the minimum allowed value is 6m (6 megabytes). The maximum amount of memory the container can use.
M, g, to indicate bytes, kilobytes, megabytes, or gigabytes. Most of these options take a positive integer, followed by a suffix of b, k, Some of these options have different effects when used alone or when more than Such as when the kernel detects low memory or contention on the host machine. Than a given amount of user or system memory, or soft limits, which allow theĬontainer to use as much memory as it needs unless certain conditions are met,
Likely for an individual container to be killed than for the Docker daemon The OOM priority on containers is not adjusted. This can effectively bring the entire system down if the wrongĭocker attempts to mitigate these risks by adjusting the OOM priority on theĭocker daemon so that it is less likely to be killed than other processes Any process is subject to killing, including Docker and other importantĪpplications. Out Of Memory Exception, and starts killing processes to free up On Linux hosts, if the kernel detects that there is notĮnough memory to perform important system functions, it throws an OOME, or It is important not to allow a running container to consume too much of the
Memory Understand the risks of running out of memory Consult your operating system’s documentation for enabling them.
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