* 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))

* 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)

* 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))

- Reduce API server memory when many CRDs are loaded by sharing a single etcd3 client logger across all clients ([#111650](https://github.com/kubernetes/kubernetes/pull/111650), [@negz](https://github.com/negz)) [SIG API Machinery]

* We change the default attach_detach_controller sync period to 1 minute to reduce the query frequency through cloud provider to check whether volumes are attached or not.  ([#41363](https://github.com/kubernetes/kubernetes/pull/41363), [@jingxu97](https://github.com/jingxu97))

### Other (Cleanup or Flake)

- Reduce event spam during a volume operation error. ([#89794](https://github.com/kubernetes/kubernetes/pull/89794), [@msau42](https://github.com/msau42)) [SIG Storage]


# v1.16.8

[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.

- Scheduler volumebinding: leveraged `PreFilterResult` to reduce down to only
  eligible node(s) for pod with bound claim(s) to local `PersistentVolume(s)` ([#109877](https://github.com/kubernetes/kubernetes/pull/109877), [@yibozhuang](https://github.com/yibozhuang))

### Other (Cleanup or Flake)

- Client-go: reduce verbosity of "Starting/Stopping reflector" messages to 3 again ([#102788](https://github.com/kubernetes/kubernetes/pull/102788), [@pohly](https://github.com/pohly)) [SIG API Machinery]