Merge pull request #48674 from my-git9/pp-17464
[zh-cn]sync manage-resources-containers.md
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@ -350,7 +350,7 @@ limits you defined.
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{{< glossary_tooltip text="CGroups" term_id="cgroup" >}},负责应用并实施所定义的请求。
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{{< glossary_tooltip text="CGroups" term_id="cgroup" >}},负责应用并实施所定义的请求。
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<!--
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<!--
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- The CPU limit defines a hard ceiling on how much CPU time that the container can use.
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- The CPU limit defines a hard ceiling on how much CPU time the container can use.
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During each scheduling interval (time slice), the Linux kernel checks to see if this
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During each scheduling interval (time slice), the Linux kernel checks to see if this
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limit is exceeded; if so, the kernel waits before allowing that cgroup to resume execution.
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limit is exceeded; if so, the kernel waits before allowing that cgroup to resume execution.
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-->
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-->
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@ -443,11 +443,11 @@ kubelet 会将 Pod 的资源使用情况作为 Pod
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If you do not specify a `sizeLimit` for an `emptyDir` volume, that volume may
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If you do not specify a `sizeLimit` for an `emptyDir` volume, that volume may
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consume up to that pod's memory limit (`Pod.spec.containers[].resources.limits.memory`).
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consume up to that pod's memory limit (`Pod.spec.containers[].resources.limits.memory`).
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If you do not set a memory limit, the pod has no upper bound on memory consumption,
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If you do not set a memory limit, the pod has no upper bound on memory consumption,
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and can consume all available memory on the node. Kubernetes schedules pods based
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and can consume all available memory on the node. Kubernetes schedules pods based
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on resource requests (`Pod.spec.containers[].resources.requests`) and will not
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on resource requests (`Pod.spec.containers[].resources.requests`) and will not
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consider memory usage above the request when deciding if another pod can fit on
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consider memory usage above the request when deciding if another pod can fit on
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a given node. This can result in a denial of service and cause the OS to do
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a given node. This can result in a denial of service and cause the OS to do
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out-of-memory (OOM) handling. It is possible to create any number of `emptyDir`s
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out-of-memory (OOM) handling. It is possible to create any number of `emptyDir`s
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that could potentially consume all available memory on the node, making OOM
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that could potentially consume all available memory on the node, making OOM
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more likely.
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more likely.
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-->
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-->
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@ -463,23 +463,23 @@ Kubernetes 基于资源请求(`Pod.spec.containers[].resources.requests`)调
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<!--
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<!--
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From the perspective of memory management, there are some similarities between
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From the perspective of memory management, there are some similarities between
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when a process uses memory as a work area and when using memory-backed
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when a process uses memory as a work area and when using memory-backed
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`emptyDir`. But when using memory as a volume like memory-backed `emptyDir`,
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`emptyDir`. But when using memory as a volume, like memory-backed `emptyDir`,
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there are additional points below that you should be careful of.
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there are additional points below that you should be careful of:
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-->
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-->
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从内存管理的角度来看,进程使用内存作为工作区与使用内存作为 `emptyDir` 的介质有一些相似之处。
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从内存管理的角度来看,进程使用内存作为工作区与使用内存作为 `emptyDir` 的介质有一些相似之处。
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但当将内存用作存储卷(例如内存为介质的 `emptyDir` 卷)时,你需要额外注意以下几点:
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但当将内存用作存储卷(例如内存为介质的 `emptyDir` 卷)时,你需要额外注意以下几点:
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<!--
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<!--
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* Files stored on a memory-backed volume are almost entirely managed by the
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* Files stored on a memory-backed volume are almost entirely managed by the
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user application. Unlike when used as a work area for a process, you can not
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user application. Unlike when used as a work area for a process, you can not
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rely on things like language-level garbage collection.
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rely on things like language-level garbage collection.
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* The purpose of writing files to a volume is to save data or pass it between
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* The purpose of writing files to a volume is to save data or pass it between
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applications. Neither Kubernetes nor the OS may automatically delete files
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applications. Neither Kubernetes nor the OS may automatically delete files
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from a volume, so memory used by those files can not be reclaimed when the
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from a volume, so memory used by those files can not be reclaimed when the
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system or the pod are under memory pressure.
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system or the pod are under memory pressure.
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* A memory-backed `emptyDir` is useful because of its performance, but memory
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* A memory-backed `emptyDir` is useful because of its performance, but memory
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is generally much smaller in size and much higher in cost than other storage
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is generally much smaller in size and much higher in cost than other storage
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media, such as disks or SSDs. Using large amounts of memory for `emptyDir`
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media, such as disks or SSDs. Using large amounts of memory for `emptyDir`
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volumes may affect the normal operation of your pod or of the whole node,
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volumes may affect the normal operation of your pod or of the whole node,
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so should be used carefully.
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so should be used carefully.
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-->
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-->
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