// most preferred is the one with the greatest sum of weights, i.e.
  // for each node that meets all of the scheduling requirements (resource
  // request, requiredDuringScheduling affinity expressions, etc.),
  // compute a sum by iterating through the elements of this field and adding
  // "weight" to the sum if the node matches the corresponding matchExpressions; the
  // node(s) with the highest sum are the most preferred.
  // +optional

</p>

<pre>
// sum returns the sum (concatenation, for strings) of its arguments.
func sum[T ~int | ~float64 | ~string](x... T) T { … }

x := sum                       // illegal: the type of x is unknown
intSum := sum[int]             // intSum has type func(x... int) int
a := intSum(2, 3)              // a has value 5 of type int
b := sum[float64](2.0, 3)      // b has value 5.0 of type float64

 `http_request_duration_microseconds` `http_request_duration_microseconds_sum` `http_request_duration_microseconds_count`
 `http_request_size_bytes`
 `http_request_size_bytes_sum`
 `http_request_size_bytes_count`
 `http_requests_total, http_response_size_bytes`
 `http_response_size_bytes_sum`
 `http_response_size_bytes_count`

   The `read_vs_write_current_requests` metric histogram is adjusted, in the case of using API Priority and Fairness instead of max-in-flight, to divide by the relevant limit: sum of queue capacities for waiting requests, sum of seat limits for executing requests. ([#110164](https://github.com/kubernetes/kubernetes/pull/110164), [@MikeSpreitzer](https://github.com/MikeSpreitzer))

  - apiserver_flowcontrol_next_s_bounds: min and max next S among non-empty queues
  - apiserver_flowcontrol_next_discounted_s_bounds: min and max next S - (sum [over requests executing] width * estimatedDuration) among non-empty queues ([#102859](https://github.com/kubernetes/kubernetes/pull/102859), [@MikeSpreitzer](https://github.com/MikeSpreitzer)) [SIG API Machinery and Instrumentation]

- CRD `x-kubernetes-validations` rules now support the CEL functions: `isSorted`, `sum`, `min`, `max`, `indexOf`, `lastIndexOf`, `find` and `findAll`. ([#108312](https://github.com/kubernetes/kubernetes/pull/108312), [@jpbetz](https://github.com/jpbetz))