- Added the `SizeBasedListCostEstimate` feature gate (enabled by default), which changes how APF seats are assigned to `LIST` requests. With this feature, one seat is assigned per 100KB of data loaded into memory at once during a `LIST` operation. ([#132932](https://github.com/kubernetes/kubernetes/pull/132932), [@serathius](https://github.com/serathius))...

  - **apiserver_flowcontrol_priority_level_seat_count_samples**: histograms of seats occupied by executing requests (both regular and final-delay phases included), broken down by priority_level; the observations are taken once per millisecond.

flip(data, options) {\n  // if `inner` modifier is enabled, we can't use the `flip` modifier\n  if (isModifierEnabled(data.instance.modifiers, 'inner')) {\n    return data;\n  }\n\n  if (data.flipped && data.placement === data.originalPlacement) {\n    // seems like flip is trying to loop, probably there's not enough space on any of the flippable sides\n    return data;\n  }\n\n  const boundaries = getBoundaries(\n    data.instance.popper,\n    data.instance.reference,\n    options.padding,\n    options....

- Updated kube-apiserver's priority & fairness work estimator such that 'max seats' is MIN(0.15 x nominalCL, nominalCL / handSize)
  

### Feature

- A new Priority and Fairness metric 'apiserver_flowcontrol_work_estimate_seats_samples' has been added that tracks the estimated seats associated with a request. ([#106628](https://github.com/kubernetes/kubernetes/pull/106628), [@tkashem](https://github.com/tkashem))

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0F,YAAYlB,GACtB6B,EAASN,IAAI,CACXC,OAAQ,UACRC,MAAO,YAELI,EAASnE,SAASqC,IACpB8B,EAASX,YAAYnB,GAGvB8B,EAASC,aAGX5E,KAAKC,SAASnB,QAAQR,EAAAA,QAAEoD,MA7HP,4BA6H+B1B,KAAKE,YAGvD6E,eAAA,WACM/E,KAAKE,QAAQM,SAASsC,GACxB9C,KAAK6E,WAIP7E,KAAKoE,cAKPxC,MAAA,SAAMoD,GAAM,IAAAC,EAAAjF,KACVA,KAAKE,QAAU8E,EAEf1G,EAAAA,QAAE0B,MAAMe,KAAKf,KAAKK,UAAU8C,iBAAiB+B,OAAM,WACjDD,EAAKd,YAGP7F,EAAAA,QAAE0B,MAAMe,KAAKf,KAAKK,UAAUgD,iBAAiB6B,OAAM,WACjDD,EAAKF,oBAGPzG,EAAAA,QAAE0B,MAAMe,KAAKf,KAAKK,UAAU+C,eAAe8B,OAAM,WAC/CD,...

- Introduced new apiserver metric `apiserver_flowcontrol_current_inqueue_seats`. This metric is analogous to `apiserver_flowcontrol_current_inqueue_requests`, but tracks the total number of seats, as each request can take more than one seat. ([#119385](https://github.com/kubernetes/kubernetes/pull/119385), [@andrewsykim](https://github.com/andrewsykim))

- Update kube-apiserver's priority & fairness work estimator such that 'max seats' is MIN(0.15 x nominalCL, nominalCL / handSize)
  

      iptables, saving a bit of memory/time/cpu. (#106373, @aojea) [SIG Network]
- Watch requests that are delegated to aggregated apiservers no longer reserve concurrency units (seats) in the API Priority and Fairness dispatcher for their entire duration. (#105827, @benluddy) [SIG API Machinery]

## Dependencies

### Added
_Nothing has changed._

### Changed