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- HPA controller exposes the following metrics from the kube-controller-manager. 
  - `metric_computation_duration_seconds`: The time(seconds) that the HPA controller takes to calculate one metric.

- CRI: exposed commit memory bytes in container stats specific to Windows ([#119238](https://github.com/kubernetes/kubernetes/pull/119238), [@kiashok](https://github.com/kiashok))
- Client-go now exposes two new metrics to monitor the client-go logic that
  generate http.Transports for the clients.
  
  - `rest_client_transport_cache_entries` is a gauge metric
  with the number of existing entries in the internal cache

  of environment variables for containers in Pods. ([#123385](https://github.com/kubernetes/kubernetes/pull/123385), [@HirazawaUi](https://github.com/HirazawaUi))
- Added a new (alpha) field, `trafficDistribution`, to the Service `spec` to express preferences for traffic distribution to endpoints. Enabled through the `ServiceTrafficDistribution` feature gate. ([#123487](https://github.com/kubernetes/kubernetes/pull/123487), [@gauravkghildiyal](https://github.com/gauravkghildiyal))

- The `IndexedJob` and `SuspendJob` feature gates that graduated to GA in 1.24 and were unconditionally enabled have been removed in v1.26....

- `kubelet` now emits a metric for end-to-end pod startup latency, including image pull. ([#121041](https://github.com/kubernetes/kubernetes/pull/121041), [@ruiwen-zhao](https://github.com/ruiwen-zhao))
- `kubelet` now exposes latency metrics of different stages of the node startup. ([#118568](https://github.com/kubernetes/kubernetes/pull/118568), [@qiutongs](https://github.com/qiutongs))

### Documentation