# Identify slowest feed operations

Analyzes and ranks feed operations by their average execution time across all users. Helps identify performance bottlenecks.

RBAC:
- requires ANY of Jobs.Read, Jobs.Manage

Endpoint: GET /api/v1/admin/feed/metrics/slowest-operations
Version: 1.0
Security: 

## Query parameters:

  - `limit` (integer)
    Maximum number of operations to return (default: 10)
    Example: 10

  - `ownerType` (string,null)
    Optional owner type filter
    Enum: "USER", "EVENT", "CATEGORY"

  - `window` (string, required)
    Time window for analysis
    Enum: "TEN_MINUTES", "ONE_HOUR", "TWENTY_FOUR_HOURS"

## Response 200 fields (application/json):

  - `slowestOperations` (array, required)

  - `slowestOperations.globalAverage` (number)

  - `slowestOperations.totalMeasurements` (integer)

  - `slowestOperations.totalTime` (integer)

  - `slowestOperations.userCount` (integer)

  - `slowestOperations.lastUpdated` (string, required)
    Example: "2022-03-10T16:15:50Z"

  - `slowestOperations.operation` (string, required)
    Enum: "populate", "merge", "unmerge", "redis", "redisLex", "cache", "idsDb", "db", "add", "remove"

  - `slowestOperations.ownerType` (string,null)
    Owner types for posts:
      * USER - user’s channel (personal or group channel)
      * EVENT - event (personal or group)
      * CATEGORY - forum category

       POST OWNER: 
      - Personal channel
          - userId = author
          - ownerId = userId (Type.USER)
          - ownerType = USER
          - groupId = null
      - Forum post
          - userId = author
          - ownerId = categoryId (Type.CATEGORY)
          - ownerType = CATEGORY
          - groupId = forum’s groupId
      - Personal event
          - userId = author
          - ownerId = eventId (Type.EVENT)
          - ownerType = EVENT
          - groupId = null
      - Group channel
          - userId = author
          - ownerId = channel userId (Type.USER)
          - ownerType = USER
          - groupId = groupId
      - Group event
          - userId = author
          - ownerId = eventId (Type.EVENT)
          - ownerType = EVENT
          - groupId = groupId
    Enum: "USER", "EVENT", "CATEGORY"

  - `totalOperationsAnalyzed` (integer)

## Response 403 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation