diff --git a/specification/_global/health_report/types.ts b/specification/_global/health_report/types.ts
index 847dc711a5..76f67d43d5 100644
--- a/specification/_global/health_report/types.ts
+++ b/specification/_global/health_report/types.ts
@@ -26,7 +26,8 @@ export enum IndicatorHealthStatus {
   green,
   yellow,
   red,
-  unknown
+  unknown,
+  unavailable
 }
 
 export class Indicators {
diff --git a/specification/_types/Stats.ts b/specification/_types/Stats.ts
index 5cea123f56..2787c0d69b 100644
--- a/specification/_types/Stats.ts
+++ b/specification/_types/Stats.ts
@@ -109,6 +109,15 @@ export class DocStats {
    * Elasticsearch reclaims the disk space of deleted Lucene documents when a segment is merged.
    */
   deleted?: long
+  /**
+   * Returns the total size in bytes of all documents in this stats.
+   * This value may be more reliable than store_stats.size_in_bytes in estimating the index size.
+   */
+  total_size_in_bytes?: long
+  /**
+   * Human readable total_size_in_bytes
+   */
+  total_size?: ByteSize
 }
 
 export class FielddataStats {
@@ -116,6 +125,19 @@ export class FielddataStats {
   memory_size?: ByteSize
   memory_size_in_bytes: long
   fields?: Dictionary<Field, FieldMemoryUsage>
+  global_ordinals: GlobalOrdinalsStats
+}
+
+export class GlobalOrdinalsStats {
+  build_time_in_millis?: UnitMillis
+  build_time?: string
+  fields?: Dictionary<Name, GlobalOrdinalFieldStats>
+}
+
+export class GlobalOrdinalFieldStats {
+  build_time_in_millis?: UnitMillis
+  build_time?: string
+  shard_max_value_count: long
 }
 
 export class FieldMemoryUsage {
@@ -307,7 +329,6 @@ export class SegmentsStats {
    * Total amount of memory used by all index writers across all shards assigned to selected nodes.
    */
   index_writer_memory?: ByteSize
-  index_writer_max_memory_in_bytes?: long
   /**
    * Total amount, in bytes, of memory used by all index writers across all shards assigned to selected nodes.
    */
@@ -340,11 +361,14 @@ export class SegmentsStats {
    * Total amount, in bytes, of memory used for points across all shards assigned to selected nodes.
    */
   points_memory_in_bytes: long
-  stored_memory?: ByteSize
   /**
    * Total amount, in bytes, of memory used for stored fields across all shards assigned to selected nodes.
    */
   stored_fields_memory_in_bytes: long
+  /**
+   * Total amount of memory used for stored fields across all shards assigned to selected nodes.
+   */
+  stored_fields_memory?: ByteSize
   /**
    * Total amount, in bytes, of memory used for terms across all shards assigned to selected nodes.
    */
@@ -356,7 +380,7 @@ export class SegmentsStats {
   /**
    * Total amount of memory used for term vectors across all shards assigned to selected nodes.
    */
-  term_vectory_memory?: ByteSize
+  term_vectors_memory?: ByteSize
   /**
    * Total amount, in bytes, of memory used for term vectors across all shards assigned to selected nodes.
    */
diff --git a/specification/_types/common.ts b/specification/_types/common.ts
index 00343529a8..91b93718bd 100644
--- a/specification/_types/common.ts
+++ b/specification/_types/common.ts
@@ -215,6 +215,7 @@ export type ExpandWildcards = ExpandWildcard | ExpandWildcard[]
 
 /**
  * Health status of the cluster, based on the state of its primary and replica shards.
+ * @non_exhaustive
  */
 export enum HealthStatus {
   // ES will send this enum as upper or lowercase depending on the APIs
@@ -232,7 +233,9 @@ export enum HealthStatus {
    * One or more primary shards are unassigned, so some data is unavailable. This can occur briefly during cluster startup as primary shards are assigned.
    * @aliases RED
    */
-  red
+  red,
+  unknown,
+  unavailable
 }
 
 export enum HttpMethod {
diff --git a/specification/cluster/stats/ClusterStatsResponse.ts b/specification/cluster/stats/ClusterStatsResponse.ts
index 9f7f68166d..14f582297f 100644
--- a/specification/cluster/stats/ClusterStatsResponse.ts
+++ b/specification/cluster/stats/ClusterStatsResponse.ts
@@ -20,7 +20,13 @@
 import { HealthStatus, Name, Uuid } from '@_types/common'
 import { long } from '@_types/Numeric'
 import { NodesResponseBase } from '@nodes/_types/NodesResponseBase'
-import { CCSStats, ClusterIndices, ClusterNodes } from './types'
+import { Dictionary } from '@spec_utils/Dictionary'
+import {
+  CCSStats,
+  ClusterIndices,
+  ClusterNodes,
+  ClusterSnapshotStats
+} from './types'
 
 export class StatsResponseBase extends NodesResponseBase {
   /**
@@ -40,10 +46,18 @@ export class StatsResponseBase extends NodesResponseBase {
    * @doc_id cluster-nodes
    */
   nodes: ClusterNodes
+  /**
+   * Contains stats on repository feature usage exposed in cluster stats for telemetry.
+   */
+  repositories: Dictionary<Name, Dictionary<Name, long>>
+  /**
+   * Contains stats cluster snapshots.
+   */
+  snapshots: ClusterSnapshotStats
   /**
    * Health status of the cluster, based on the state of its primary and replica shards.
    */
-  status: HealthStatus
+  status?: HealthStatus
   /**
    * Unix timestamp, in milliseconds, for the last time the cluster statistics were refreshed.
    */
diff --git a/specification/cluster/stats/types.ts b/specification/cluster/stats/types.ts
index 670e291f0e..8ea9691634 100644
--- a/specification/cluster/stats/types.ts
+++ b/specification/cluster/stats/types.ts
@@ -28,24 +28,50 @@ import {
   SegmentsStats,
   StoreStats
 } from '@_types/Stats'
-import { Duration, DurationValue, UnitMillis } from '@_types/Time'
+import { DateFormat, Duration, DurationValue, UnitMillis } from '@_types/Time'
+import { IndexingPressureMemory } from '@nodes/_types/Stats'
 import { Dictionary } from '@spec_utils/Dictionary'
 
 export class ClusterFileSystem {
+  path?: string
+  mount?: string
+  type?: string
   /**
    * Total number of bytes available to JVM in file stores across all selected nodes.
    * Depending on operating system or process-level restrictions, this number may be less than `nodes.fs.free_in_byes`.
    * This is the actual amount of free disk space the selected Elasticsearch nodes can use.
    */
-  available_in_bytes: long
+  available_in_bytes?: long
+  /**
+   * Total number of bytes available to JVM in file stores across all selected nodes.
+   * Depending on operating system or process-level restrictions, this number may be less than `nodes.fs.free_in_byes`.
+   * This is the actual amount of free disk space the selected Elasticsearch nodes can use.
+   */
+  available?: ByteSize
+  /**
+   * Total number, in bytes, of unallocated bytes in file stores across all selected nodes.
+   */
+  free_in_bytes?: long
   /**
    * Total number of unallocated bytes in file stores across all selected nodes.
    */
-  free_in_bytes: long
+  free?: ByteSize
   /**
    * Total size, in bytes, of all file stores across all selected nodes.
    */
-  total_in_bytes: long
+  total_in_bytes?: long
+  /**
+   * Total size of all file stores across all selected nodes.
+   */
+  total?: ByteSize
+  low_watermark_free_space?: ByteSize
+  low_watermark_free_space_in_bytes?: long
+  high_watermark_free_space?: ByteSize
+  high_watermark_free_space_in_bytes?: long
+  flood_stage_free_space?: ByteSize
+  flood_stage_free_space_in_bytes?: long
+  frozen_flood_stage_free_space?: ByteSize
+  frozen_flood_stage_free_space_in_bytes?: long
 }
 
 export class ClusterIndicesShardsIndex {
@@ -89,6 +115,12 @@ export class ClusterIndices {
   fielddata: FielddataStats
   /** Contains statistics about the query cache of selected nodes. */
   query_cache: QueryCacheStats
+  /**
+   * Holds a snapshot of the search usage statistics.
+   * Used to hold the stats for a single node that's part of a ClusterStatsNodeResponse, as well as to
+   * accumulate stats for the entire cluster and return them as part of the ClusterStatsResponse.
+   */
+  search: SearchUsageStats
   /** Contains statistics about segments in selected nodes. */
   segments: SegmentsStats
   /** Contains statistics about indices with shards assigned to selected nodes. */
@@ -104,6 +136,44 @@ export class ClusterIndices {
    * @doc_id analyzer-anatomy
    */
   versions?: IndicesVersions[]
+  /**
+   * Contains statistics about indexed dense vector
+   */
+  dense_vector?: DenseVectorStats
+  /**
+   * Contains statistics about indexed sparse vector
+   */
+  sparse_vector?: SparseVectorStats
+}
+
+export class SearchUsageStats {
+  total: long
+  queries: Dictionary<Name, long>
+  rescorers: Dictionary<Name, long>
+  sections: Dictionary<Name, long>
+  retrievers: Dictionary<Name, long>
+}
+
+export class DenseVectorStats {
+  value_count: long
+  off_heap?: DenseVectorOffHeapStats
+}
+
+export class SparseVectorStats {
+  value_count: long
+}
+
+export class DenseVectorOffHeapStats {
+  total_size_bytes?: long
+  total_size?: ByteSize
+  total_veb_size_bytes?: long
+  total_veb_size?: ByteSize
+  total_vec_size_bytes?: long
+  total_vec_size?: ByteSize
+  total_veq_size_bytes?: long
+  total_veq_size?: ByteSize
+  total_vex_size_bytes?: long
+  total_vex_size?: ByteSize
 }
 
 export class FieldTypesMappings {
@@ -114,7 +184,7 @@ export class FieldTypesMappings {
   /**
    * Contains statistics about runtime field data types used in selected nodes.
    */
-  runtime_field_types?: RuntimeFieldTypes[]
+  runtime_field_types: RuntimeFieldTypes[]
   /**
    * Total number of fields in all non-system indices.
    */
@@ -131,6 +201,10 @@ export class FieldTypesMappings {
    * Total size of all mappings, in bytes, after deduplication and compression.
    */
   total_deduplicated_mapping_size_in_bytes?: long
+  /**
+   * Source mode usage count.
+   */
+  source_modes: Dictionary<Name, integer>
 }
 
 export class FieldTypes {
@@ -164,6 +238,18 @@ export class FieldTypes {
    * @availability serverless
    */
   script_count?: integer
+  /**
+   * Count of mappings by index type
+   */
+  vector_index_type_count?: Dictionary<Name, integer>
+  /**
+   * Count of mappings by similarity
+   */
+  vector_similarity_type_count?: Dictionary<Name, integer>
+  /**
+   * Count of mappings by element type
+   */
+  vector_element_type_count?: Dictionary<Name, integer>
 }
 
 export class RuntimeFieldTypes {
@@ -258,12 +344,22 @@ export class CharFilterTypes {
    * Contains statistics about tokenizer types used in selected nodes.
    */
   tokenizer_types: FieldTypes[]
+  /**
+   * Contains statistics about synonyms types used in selected nodes.
+   */
+  synonyms: Dictionary<Name, SynonymsStats>
+}
+
+export class SynonymsStats {
+  count: integer
+  index_count: integer
 }
 
 export class IndicesVersions {
   index_count: integer
   primary_shard_count: integer
-  total_primary_bytes: long
+  total_primary_bytes?: long
+  total_primary_size?: ByteSize
   version: VersionString
 }
 
@@ -276,7 +372,11 @@ export class ClusterJvm {
   /**
    * Uptime duration, in milliseconds, since JVM last started.
    */
-  max_uptime_in_millis: DurationValue<UnitMillis>
+  max_uptime_in_millis?: DurationValue<UnitMillis>
+  /**
+   * Uptime duration since JVM last started.
+   */
+  max_uptime?: Duration
   /**
    * Contains statistics about memory used by selected nodes.
    */
@@ -295,11 +395,19 @@ export class ClusterJvmMemory {
   /**
    * Maximum amount of memory, in bytes, available for use by the heap across all selected nodes.
    */
-  heap_max_in_bytes: long
+  heap_max_in_bytes?: long
+  /**
+   * Maximum amount of memory available for use by the heap across all selected nodes.
+   */
+  heap_max?: ByteSize
   /**
    * Memory, in bytes, currently in use by the heap across all selected nodes.
    */
-  heap_used_in_bytes: long
+  heap_used_in_bytes?: long
+  /**
+   * Memory currently in use by the heap across all selected nodes.
+   */
+  heap_used?: ByteSize
 }
 
 export class ClusterJvmVersion {
@@ -346,24 +454,26 @@ export class ClusterNetworkTypes {
 }
 
 export class ClusterNodeCount {
-  coordinating_only: integer
-  data: integer
-  data_cold: integer
-  data_content: integer
+  total: integer
+  coordinating_only?: integer
+  data?: integer
+  data_cold?: integer
+  data_content?: integer
   /**
    * @availability stack since=7.13.0
    * @availability serverless
    */
   data_frozen?: integer
-  data_hot: integer
-  data_warm: integer
-  ingest: integer
-  master: integer
-  ml: integer
-  remote_cluster_client: integer
-  total: integer
-  transform: integer
-  voting_only: integer
+  data_hot?: integer
+  data_warm?: integer
+  index?: integer
+  ingest?: integer
+  master?: integer
+  ml?: integer
+  remote_cluster_client?: integer
+  search?: integer
+  transform?: integer
+  voting_only?: integer
 }
 
 export class ClusterNodes {
@@ -523,6 +633,69 @@ export class ClusterShardMetrics {
   min: double
 }
 
+export class ClusterSnapshotStats {
+  current_counts: SnapshotCurrentCounts
+  repositories: Dictionary<Name, PerRepositoryStats>
+}
+
+export class SnapshotCurrentCounts {
+  /**
+   * Snapshots currently in progress
+   */
+  snapshots: integer
+  /**
+   * Incomplete shard snapshots
+   */
+  shard_snapshots: integer
+  /**
+   * Snapshots deletions in progress
+   */
+  snapshot_deletions: integer
+  /**
+   * Sum of snapshots and snapshot_deletions
+   */
+  concurrent_operations: integer
+  /**
+   * Cleanups in progress, not counted in concurrent_operations as they are not concurrent
+   */
+  cleanups: integer
+}
+
+export class PerRepositoryStats {
+  type: string
+  oldest_start_time_millis?: UnitMillis
+  oldest_start_time?: DateFormat
+  current_counts: RepositoryStatsCurrentCounts
+}
+
+export class RepositoryStatsCurrentCounts {
+  snapshots: integer
+  clones: integer
+  finalizations: integer
+  deletions: integer
+  snapshot_deletions: integer
+  active_deletions: integer
+  shards: RepositoryStatsShards
+}
+
+export class RepositoryStatsShards {
+  total: integer
+  complete: integer
+  incomplete: integer
+  states: Dictionary<ShardState, integer>
+}
+
+export enum ShardState {
+  INIT,
+  SUCCESS,
+  FAILED,
+  ABORTED,
+  MISSING,
+  WAITING,
+  QUEUED,
+  PAUSED_FOR_NODE_REMOVAL
+}
+
 export class NodePackagingType {
   /**
    * Number of selected nodes using the distribution flavor and file type.
@@ -545,10 +718,22 @@ export class OperatingSystemMemoryInfo {
    * @availability serverless
    */
   adjusted_total_in_bytes?: long
+  /**
+   * Total amount of memory across all selected nodes, but using the value specified using the `es.total_memory_bytes` system property instead of measured total memory for those nodes where that system property was set.
+   * @availability stack since=7.16.0
+   * @availability serverless
+   */
+  adjusted_total?: ByteSize
+
   /**
    * Amount, in bytes, of free physical memory across all selected nodes.
    */
-  free_in_bytes: long
+  free_in_bytes?: long
+  /**
+   * Amount of free physical memory across all selected nodes.
+   */
+  free?: ByteSize
+
   /**
    * Percentage of free physical memory across all selected nodes.
    */
@@ -556,11 +741,20 @@ export class OperatingSystemMemoryInfo {
   /**
    * Total amount, in bytes, of physical memory across all selected nodes.
    */
-  total_in_bytes: long
+  total_in_bytes?: long
+  /**
+   * Total amount of physical memory across all selected nodes.
+   */
+  total?: ByteSize
+
   /**
    * Amount, in bytes, of physical memory in use across all selected nodes.
    */
-  used_in_bytes: long
+  used_in_bytes?: long
+  /**
+   * Amount of physical memory in use across all selected nodes.
+   */
+  used?: ByteSize
   /**
    * Percentage of physical memory in use across all selected nodes.
    */
@@ -571,23 +765,6 @@ export class IndexingPressure {
   memory: IndexingPressureMemory
 }
 
-export class IndexingPressureMemory {
-  current: IndexingPressureMemorySummary
-  limit_in_bytes: long
-  total: IndexingPressureMemorySummary
-}
-
-export class IndexingPressureMemorySummary {
-  all_in_bytes: long
-  combined_coordinating_and_primary_in_bytes: long
-  coordinating_in_bytes: long
-  coordinating_rejections?: long
-  primary_in_bytes: long
-  primary_rejections?: long
-  replica_in_bytes: long
-  replica_rejections?: long
-}
-
 export class CCSStats {
   /**
    * Contains remote cluster settings and metrics collected from them.
@@ -613,7 +790,7 @@ export class RemoteClusterInfo {
   /** The `skip_unavailable` setting used for this remote cluster. */
   skip_unavailable: boolean
   /** Transport compression setting used for this remote cluster. */
-  transport_compress: string
+  'transport.compress': string
   /** Health status of the cluster, based on the state of its primary and replica shards. */
   status: HealthStatus
   /** The list of Elasticsearch versions used by the nodes on the remote cluster. */
diff --git a/specification/nodes/_types/Stats.ts b/specification/nodes/_types/Stats.ts
index bb6991e62a..877c5fdb12 100644
--- a/specification/nodes/_types/Stats.ts
+++ b/specification/nodes/_types/Stats.ts
@@ -196,6 +196,10 @@ export interface PressureMemory {
    * Number of indexing requests rejected in the replica stage.
    */
   replica_rejections?: long
+  primary_document_rejections?: long
+  limit?: ByteSize
+  limit_in_bytes?: long
+  large_operation_rejections?: long
 }
 
 export class Discovery {
@@ -932,6 +936,11 @@ export class JvmMemoryStats {
    * Maximum amount of memory, in bytes, available for use by the heap.
    */
   heap_max_in_bytes?: long
+  /**
+   * Maximum amount of memory, available for use by the heap.
+   */
+  heap_max?: ByteSize
+
   /**
    * Non-heap memory used, in bytes.
    */