- Reduce default NodeStatusReportFrequency to 5 minutes. With this change, periodic node status updates will be send every 5m if node status doesn't change (otherwise they are still send with 10s).

    * see https://kubernetes.io/docs/user-guide/persistent-volumes/#class-1 for details.
* Reduce verbosity of volume reconciler when attaching volumes ([#36900](https://github.com/kubernetes/kubernetes/pull/36900), [@codablock](https://github.com/codablock))

* kubelet: resolved hang/timeout issues when running large numbers of pods with unique configmap/secret references ([#74755](https://github.com/kubernetes/kubernetes/pull/74755), [@liggitt](https://github.com/liggitt))
* Reduce memory utilization of admission webhook metrics by removing resource related labels. ([#69895](https://github.com/kubernetes/kubernetes/pull/69895), [@jpbetz](https://github.com/jpbetz))

* Fix concurrent map access panic ([#65327](https://github.com/kubernetes/kubernetes/pull/65327), [@dashpole](https://github.com/dashpole))
    * Don't watch .mount cgroups to reduce number of inotify watches
    * Fix NVML initialization race condition
    * Fix brtfs disk metrics when using a subdirectory of a subvolume

* Add `metrics-port` to kube-proxy cmd flags. ([#72682](https://github.com/kubernetes/kubernetes/pull/72682), [@whypro](https://github.com/whypro))
* Reduce memory utilization of admission webhook metrics by removing resource related labels. ([#69895](https://github.com/kubernetes/kubernetes/pull/69895), [@jpbetz](https://github.com/jpbetz))



# v1.11.8

### Other (Cleanup or Flake)

- Build: Bump kube-cross to v1.12.17-2 ([#90760](https://github.com/kubernetes/kubernetes/pull/90760), [@justaugustus](https://github.com/justaugustus)) [SIG Release]
- Reduce event spam during a volume operation error. ([#89794](https://github.com/kubernetes/kubernetes/pull/89794), [@msau42](https://github.com/msau42)) [SIG Storage]


# v1.15.11

[Documentation](https://docs.k8s.io)

- Kubectl: Fixes bug by aggregating 'apply' errors instead of failing after first error ([#89607](https://github.com/kubernetes/kubernetes/pull/89607), [@seans3](https://github.com/seans3)) [SIG CLI and Testing]
- Reduce event spam during a volume operation error. ([#89796](https://github.com/kubernetes/kubernetes/pull/89796), [@msau42](https://github.com/msau42)) [SIG Storage]


# v1.18.0

[Documentation](https://docs.k8s.io)

    * Disable the metadata agent for monitored resource construction in logging.
    * Disable timestamp adjustment in logs to optimize performance.
    * Reduce logging agent buffer chunk limit to 512k to optimize performance.

- Reduced GCE log rotation check from 1 hour to every 5 minutes.  Rotation policy is unchanged (new day starts, log file size > 100MB). ([#72062](https://github.com/kubernetes/kubernetes/pull/72062), [@jpbetz](https://github.com/jpbetz))

### Network

* fix race condition when attach azure disk in vmss ([#71992](https://github.com/kubernetes/kubernetes/pull/71992), [@andyzhangx](https://github.com/andyzhangx))
* Reduce CSI log and event spam. ([#71581](https://github.com/kubernetes/kubernetes/pull/71581), [@saad-ali](https://github.com/saad-ali))