// maximumSize/Weight is specified in which case ensure that each segment gets at least 10
    // entries. The special casing for size-based eviction is only necessary because that eviction
    // happens per segment instead of globally, so too many segments compared to the maximum size
    // will result in random eviction behavior.
    int segmentShift = 0;
    int segmentCount = 1;
    while (segmentCount < concurrencyLevel

    // maximumSize/Weight is specified in which case ensure that each segment gets at least 10
    // entries. The special casing for size-based eviction is only necessary because that eviction
    // happens per segment instead of globally, so too many segments compared to the maximum size
    // will result in random eviction behavior.
    int segmentShift = 0;
    int segmentCount = 1;
    while (segmentCount < concurrencyLevel

* Change eviction logic in NodeController and make it Zone-aware ([#28897](https://github.com/kubernetes/kubernetes/pull/28897), [@gmarek](https://github.com/gmarek))
    * Change eviction policies in NodeController:
      *  add a "partialDisruption" mode, when more than 33% of Nodes in the zone are not Ready

    int maxSize = 10;
    LocalCache<Object, Object> map =
        makeLocalCache(createCacheBuilder().concurrencyLevel(1).maximumSize(maxSize));

    // manually add elements to avoid eviction
    int originalCount = 1024;
    LinkedHashMap<Object, Object> originalMap = Maps.newLinkedHashMap();
    for (int i = 0; i < originalCount; i++) {
      Object key = new Object();

    int maxSize = 10;
    LocalCache<Object, Object> map =
        makeLocalCache(createCacheBuilder().concurrencyLevel(1).maximumSize(maxSize));

    // manually add elements to avoid eviction
    int originalCount = 1024;
    LinkedHashMap<Object, Object> originalMap = Maps.newLinkedHashMap();
    for (int i = 0; i < originalCount; i++) {
      Object key = new Object();

  - [beta] Kubelet integrates with memcg notification API to detect when a hard eviction threshold is crossed ([kubernetes/features#125](https://github.com/kubernetes/enhancements/issues/125))

Number of gateway errors before a host is ejected from the connection pool. nullable: true type: integer consecutiveLocalOrig: description: The number of consecutive locally originated failures before ejection occurs. nullable: true type: integer interval: description: Time interval between ejection sweep analysis. type: string maxEjectionPercent: description: Maximum % of hosts in the load balancing pool for the upstream service that can be ejected. format: int32 type: integer minHealthPercent: description:...

- Client-go: Optimized leaders renewing leases by updating leader lock optimistically without getting the record from the API server first. Also, a new metric `leader_election_slowpath_total` was added to allow users to monitor how many leader elections are updated non-optimistically.
   ([#122069](https://github.com/kubernetes/kubernetes/pull/122069), [@linxiulei](https://github.com/linxiulei))

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