For AI agents: a documentation index is available at https://www.mongodb.com/es/docs/llms.txt — markdown versions of all pages are available by appending .md to any URL path.
Docs Menu
Docs Home
/ /
$queryStats
Docs Home
/ /
Aggregation Stages
/
$queryStats
Docs Home
/
Development
/
Query Language
/
Aggregation Stages
/
$queryStats

Toggle $queryStats Log Output

MongoDB records $queryStats operations in the deployment logs. By default, MongoDB only logs the invocation of $queryStats operations, not the operation's output. For $queryStats operations that include the transformIdentifiers option, you can specify whether the transformed output is included in the log entry.

Including $queryStats output in the logs provides more information on specific $queryStats operations, but can negatively impact cluster performance as log updates take more time and resources.

About this Task

When MongoDB logs $queryStats output, the results are redacted and anonymized. $queryStats output does not contain literals or field values.

For an example of transformed $queryStats output, see Transformed Example.

Steps

1

In the MongoDB Atlas UI, go to the Clusters page for your project.

  1. If it's not already displayed, select the organization that contains your desired project from the Organizations menu in the navigation bar.

  2. If it's not already displayed, select your project from the Projects menu in the navigation bar.

  3. In the sidebar, click Clusters under the Database heading.

    The Clusters page displays.

2

Click Edit Config

3

Select your cluster from the dropdown

4

Open the Additional Settings dropdown

5

Open the More Configuration Options dropdown

6

Toggle the Enable Logging of Redacted and Anonymized Query Data setting

7

Click Review Changes

8

Click Apply Changes

Examples

The following examples show the differences in log messages when $queryStats output is included.

Note

The example log entries are reformatted for readability.

$queryStats Output Omitted (Default Behavior)

{
  "t":{"$date":"2026-08-14T13:36:19.194-04:00"},"s":"D1",
  "c":"QRYSTATS", "id":7808300, "ctx":"conn12","msg":"Logging
  invocation
  $queryStats","attr":{"commandSpec":{"transformIdentifiers":{"algorithm":"hmac-sha-256","hmacKey":"###"}}}
}

$queryStats Output Included

The following entries show $queryStats output for find, aggregate, update, insert, and delete commands.

{
  "t":{"$date":"2026-08-14T13:36:19.194-04:00"},"s":"D1",
  "c":"QRYSTATS", "id":7808300, "ctx":"conn12","msg":"Logging
  invocation
  $queryStats","attr":{"commandSpec":{"transformIdentifiers":{"algorithm":"hmac-sha-256","hmacKey":"###"}}}
}
{
  "t":{"$date":"2026-08-14T13:36:19.195-04:00"},"s":"D3",
  "c":"QRYSTATS", "id":7808301, "ctx":"conn12","msg":"Logging all
  outputs of $queryStats","attr":{"thisOutput":"{key: {queryShape:
  {cmdNs: {db: \"NDXwsPk1xffftPK7Ga+NkvqvpzJ2HsQo6Y0HWzKLUfE=\",
  coll: \"v1pv8qfNsL3bTnmkylPZQV8I0uGOyLulAWaRDNyL9W4=\"}, command:
  \"find\", filter: {9E+xqjUFAszhgGsn+U4PFNBgyA1Ll2bJ5e3v7rodohk=:
  {$eq: \"?string\"}}}, client: {application: {name: \"MongoDB
  Shell\"}, driver: {name: \"MongoDB Internal Client\", version:
  \"9.0.0-alpha0-b10821b6\"}, os: {type: \"Darwin\", name: \"Mac OS
  X\", architecture: \"arm64\", version: \"25.6.0\"}},
  collectionType: \"collection\"}, keyHash:
  \"U7VRHEiTzlK9gexBBktB3uiL9IATNdEmTwu0QrqCLRc=\", queryShapeHash:
  \"E28B52C6E424C945EFD51950FF2894D64FAD59114BC5563CE8B56BD7D6132616\",
  metrics: {lastExecutionMicros: 246, execCount: 1, totalExecMicros:
  {sum: 246, max: 246, min: 246, sumOfSquares: 60516},
  workingTimeMillis: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  cursor: {firstResponseExecMicros: {sum: 246, max: 246, min: 246,
  sumOfSquares: 60516}}, queryExec: {docsReturned: {sum: 2, max: 2,
  min: 2, sumOfSquares: 4}, keysExamined: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, docsExamined: {sum: 3, max: 3, min: 3,
  sumOfSquares: 9}, bytesRead: {sum: 0, max: 0, min: 0, sumOfSquares:
  0}, readTimeMicros: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  delinquentAcquisitions: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  totalAcquisitionDelinquencyMillis: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, maxAcquisitionDelinquencyMillis: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, totalTimeQueuedMicros: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, totalAdmissions: {sum: 1, max: 1, min: 1,
  sumOfSquares: 1}, wasLoadShed: {true: 0, false: 1},
  wasDeprioritized: {true: 0, false: 1}, wasMarkedNonDeprioritizable:
  {true: 0, false: 1}, numInterruptChecksPerSec: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, overdueInterruptApproxMaxMillis: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, peakTrackedMemBytes: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, clusterPeakTrackedMemBytes: {sum:
  0, max: 0, min: 0, sumOfSquares: 0}}, queryPlanner: {hasSortStage:
  {true: 0, false: 1}, usedDisk: {true: 0, false: 1},
  fromMultiPlanner: {true: 0, false: 1}, fromPlanCache: {true: 0,
  false: 1}, planShapeCounters: {patterns: {collscan: 1}, nodes:
  {collscanWithFilter: 1}, accessPaths: {collscan: 1}},
  planningTimeMicros: {sum: 202, max: 202, min: 202, sumOfSquares:
  40804}, costBasedRanker: {cardinalityEstimationMethods: {Histogram:
  0, Sampling: 0, Heuristics: 0, Mixed: 0, Metadata: 0, Code: 0},
  nDocsSampled: {sum: 0, max: 0, min: 0, sumOfSquares: 0}}}, writes:
  {nMatched: {sum: 0, max: 0, min: 0, sumOfSquares: 0}, nUpserted:
  {sum: 0, max: 0, min: 0, sumOfSquares: 0}, nModified: {sum: 0, max:
  0, min: 0, sumOfSquares: 0}, nDeleted: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, nInserted: {sum: 0, max: 0, min: 0, sumOfSquares:
  0}, nUpdateOps: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  nDeleteOps: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  keysInserted: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  keysDeleted: {sum: 0, max: 0, min: 0, sumOfSquares: 0}},
  firstSeenTimestamp: 2026-08-14T17:36:03.196Z, latestSeenTimestamp:
  2026-08-14T17:36:03.196Z}, asOf: 2026-08-14T17:36:19.195Z}"}
}
{
  "t":{"$date":"2026-08-14T13:36:19.195-04:00"},"s":"D3",
  "c":"QRYSTATS", "id":7808301, "ctx":"conn12","msg":"Logging all
  outputs of $queryStats","attr":{"thisOutput":"{key: {queryShape:
  {cmdNs: {db: \"NDXwsPk1xffftPK7Ga+NkvqvpzJ2HsQo6Y0HWzKLUfE=\",
  coll: \"v1pv8qfNsL3bTnmkylPZQV8I0uGOyLulAWaRDNyL9W4=\"}, command:
  \"aggregate\", pipeline: [{$match:
  {9E+xqjUFAszhgGsn+U4PFNBgyA1Ll2bJ5e3v7rodohk=: {$eq:
  \"?string\"}}}, {$group: {_id:
  \"$9E+xqjUFAszhgGsn+U4PFNBgyA1Ll2bJ5e3v7rodohk=\",
  HQq+4Kt4CRz2lLU0og3Sw5lggExgcDoIjidwYwXji5M=: {$sum:
  \"$Z/e4M5zUamGn1c4D4W1lcBDfPcZDJ+U07OaPBq43Dz0=\"}}}]}, client:
  {application: {name: \"MongoDB Shell\"}, driver: {name: \"MongoDB
  Internal Client\", version: \"9.0.0-alpha0-b10821b6\"}, os: {type:
  \"Darwin\", name: \"Mac OS X\", architecture: \"arm64\", version:
  \"25.6.0\"}}, collectionType: \"collection\", cursor: {batchSize:
  \"?number\"}}, keyHash:
  \"FyGyKT3wiuz4MTuVDmEfZacv2hn5lDqg5mszK6lx1xI=\", queryShapeHash:
  \"4C28EC9EC1777AEA2C1BD041EC953DD5F4913B347561CB2B1E65BBF89AD7FD8F\",
  metrics: {lastExecutionMicros: 1146, execCount: 1, totalExecMicros:
  {sum: 1146, max: 1146, min: 1146, sumOfSquares: 1313316},
  workingTimeMillis: {sum: 1, max: 1, min: 1, sumOfSquares: 1},
  cursor: {firstResponseExecMicros: {sum: 1146, max: 1146, min: 1146,
  sumOfSquares: 1313316}}, queryExec: {docsReturned: {sum: 1, max: 1,
  min: 1, sumOfSquares: 1}, keysExamined: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, docsExamined: {sum: 3, max: 3, min: 3,
  sumOfSquares: 9}, bytesRead: {sum: 0, max: 0, min: 0, sumOfSquares:
  0}, readTimeMicros: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  delinquentAcquisitions: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  totalAcquisitionDelinquencyMillis: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, maxAcquisitionDelinquencyMillis: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, totalTimeQueuedMicros: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, totalAdmissions: {sum: 1, max: 1, min: 1,
  sumOfSquares: 1}, wasLoadShed: {true: 0, false: 1},
  wasDeprioritized: {true: 0, false: 1}, wasMarkedNonDeprioritizable:
  {true: 0, false: 1}, numInterruptChecksPerSec: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, overdueInterruptApproxMaxMillis: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, peakTrackedMemBytes: {sum: 101,
  max: 101, min: 101, sumOfSquares: 10201},
  clusterPeakTrackedMemBytes: {sum: 101, max: 101, min: 101,
  sumOfSquares: 10201}}, queryPlanner: {hasSortStage: {true: 0,
  false: 1}, usedDisk: {true: 0, false: 1}, fromMultiPlanner: {true:
  0, false: 1}, fromPlanCache: {true: 0, false: 1},
  planShapeCounters: {patterns: {collscan: 1}, nodes:
  {collscanWithFilter: 1, group: 1}, accessPaths: {collscan: 1}},
  planningTimeMicros: {sum: 848, max: 848, min: 848, sumOfSquares:
  719104}, costBasedRanker: {cardinalityEstimationMethods:
  {Histogram: 0, Sampling: 0, Heuristics: 0, Mixed: 0, Metadata: 0,
  Code: 0}, nDocsSampled: {sum: 0, max: 0, min: 0, sumOfSquares:
  0}}}, writes: {nMatched: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  nUpserted: {sum: 0, max: 0, min: 0, sumOfSquares: 0}, nModified:
  {sum: 0, max: 0, min: 0, sumOfSquares: 0}, nDeleted: {sum: 0, max:
  0, min: 0, sumOfSquares: 0}, nInserted: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, nUpdateOps: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, nDeleteOps: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, keysInserted: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, keysDeleted: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}}, firstSeenTimestamp: 2026-08-14T17:36:04.433Z,
  latestSeenTimestamp: 2026-08-14T17:36:04.433Z}, asOf:
  2026-08-14T17:36:19.194Z}"}
}
{
  "t":{"$date":"2026-08-14T13:36:19.195-04:00"},"s":"D3",
  "c":"QRYSTATS", "id":7808301, "ctx":"conn12","msg":"Logging all
  outputs of $queryStats","attr":{"thisOutput":"{key: {queryShape:
  {cmdNs: {db: \"NDXwsPk1xffftPK7Ga+NkvqvpzJ2HsQo6Y0HWzKLUfE=\",
  coll: \"v1pv8qfNsL3bTnmkylPZQV8I0uGOyLulAWaRDNyL9W4=\"}, command:
  \"update\", q: {9E+xqjUFAszhgGsn+U4PFNBgyA1Ll2bJ5e3v7rodohk=: {$eq:
  \"?string\"}}, u: {$set:
  {ntZWU4H2LlLmZzz67Wb2vTWkk4LqfIOhuAFRX0sULWE=: \"?bool\"}}, multi:
  true, upsert: false}, client: {application: {name: \"MongoDB
  Shell\"}, driver: {name: \"MongoDB Internal Client\", version:
  \"9.0.0-alpha0-b10821b6\"}, os: {type: \"Darwin\", name: \"Mac OS
  X\", architecture: \"arm64\", version: \"25.6.0\"}},
  collectionType: \"collection\", ordered: true,
  bypassDocumentValidation: false}, keyHash:
  \"mhznRyq080m/f+3o2iFavJzqDi4sNicFd9hCXm8jTIM=\", queryShapeHash:
  \"5152AD802AF45FC6F8AF1840216B7361A0FD03BDE703C2E3955E476B554556FA\",
  metrics: {lastExecutionMicros: 254, execCount: 1, totalExecMicros:
  {sum: 254, max: 254, min: 254, sumOfSquares: 64516},
  workingTimeMillis: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  cursor: {firstResponseExecMicros: {sum: 254, max: 254, min: 254,
  sumOfSquares: 64516}}, queryExec: {docsReturned: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, keysExamined: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, docsExamined: {sum: 3, max: 3, min: 3,
  sumOfSquares: 9}, bytesRead: {sum: 0, max: 0, min: 0, sumOfSquares:
  0}, readTimeMicros: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  delinquentAcquisitions: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  totalAcquisitionDelinquencyMillis: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, maxAcquisitionDelinquencyMillis: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, totalTimeQueuedMicros: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, totalAdmissions: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, wasLoadShed: {true: 0, false: 1},
  wasDeprioritized: {true: 0, false: 1}, wasMarkedNonDeprioritizable:
  {true: 0, false: 1}, numInterruptChecksPerSec: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, overdueInterruptApproxMaxMillis: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, peakTrackedMemBytes: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, clusterPeakTrackedMemBytes: {sum:
  0, max: 0, min: 0, sumOfSquares: 0}}, queryPlanner: {hasSortStage:
  {true: 0, false: 1}, usedDisk: {true: 0, false: 1},
  fromMultiPlanner: {true: 0, false: 1}, fromPlanCache: {true: 0,
  false: 1}, planningTimeMicros: {sum: 136, max: 136, min: 136,
  sumOfSquares: 18496}, costBasedRanker:
  {cardinalityEstimationMethods: {Histogram: 0, Sampling: 0,
  Heuristics: 0, Mixed: 0, Metadata: 0, Code: 0}, nDocsSampled: {sum:
  0, max: 0, min: 0, sumOfSquares: 0}}}, writes: {nMatched: {sum: 2,
  max: 2, min: 2, sumOfSquares: 4}, nUpserted: {sum: 0, max: 0, min:
  0, sumOfSquares: 0}, nModified: {sum: 2, max: 2, min: 2,
  sumOfSquares: 4}, nDeleted: {sum: 0, max: 0, min: 0, sumOfSquares:
  0}, nInserted: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  nUpdateOps: {sum: 1, max: 1, min: 1, sumOfSquares: 1}, nDeleteOps:
  {sum: 0, max: 0, min: 0, sumOfSquares: 0}, keysInserted: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, keysDeleted: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}}, firstSeenTimestamp:
  2026-08-14T17:36:05.666Z, latestSeenTimestamp:
  2026-08-14T17:36:05.666Z}, asOf: 2026-08-14T17:36:19.195Z}"}
}
{
  "t":{"$date":"2026-08-14T13:36:19.194-04:00"},"s":"D3",
  "c":"QRYSTATS", "id":7808301, "ctx":"conn12","msg":"Logging all
  outputs of $queryStats","attr":{"thisOutput":"{key: {queryShape:
  {cmdNs: {db: \"NDXwsPk1xffftPK7Ga+NkvqvpzJ2HsQo6Y0HWzKLUfE=\",
  coll: \"v1pv8qfNsL3bTnmkylPZQV8I0uGOyLulAWaRDNyL9W4=\"}, command:
  \"insert\", documents: \"?array<?object>\"}, client: {application:
  {name: \"MongoDB Shell\"}, driver: {name: \"MongoDB Internal
  Client\", version: \"9.0.0-alpha0-b10821b6\"}, os: {type:
  \"Darwin\", name: \"Mac OS X\", architecture: \"arm64\", version:
  \"25.6.0\"}}, collectionType: \"collection\", ordered: true,
  bypassDocumentValidation: false}, keyHash:
  \"SNtsq6eAxUoAUe9gY4qbTCRLelSdAwkLV9IzW1ai784=\", queryShapeHash:
  \"F8CEACC0792556F9C439C7E4B542DE511D5F735B3DB7A0DA3C59949878FB02D4\",
  metrics: {lastExecutionMicros: 178, execCount: 2, totalExecMicros:
  {sum: 22362, max: 22184, min: 178, sumOfSquares: 492161540},
  workingTimeMillis: {sum: 22, max: 22, min: 0, sumOfSquares: 484},
  cursor: {firstResponseExecMicros: {sum: 22362, max: 22184, min:
  178, sumOfSquares: 492161540}}, queryExec: {docsReturned: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, keysExamined: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, docsExamined: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, bytesRead: {sum: 0, max: 0, min: 0, sumOfSquares:
  0}, readTimeMicros: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  delinquentAcquisitions: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  totalAcquisitionDelinquencyMillis: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, maxAcquisitionDelinquencyMillis: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, totalTimeQueuedMicros: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, totalAdmissions: {sum: 4, max: 3, min: 1,
  sumOfSquares: 10}, wasLoadShed: {true: 0, false: 2},
  wasDeprioritized: {true: 0, false: 2}, wasMarkedNonDeprioritizable:
  {true: 0, false: 2}, numInterruptChecksPerSec: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, overdueInterruptApproxMaxMillis: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, peakTrackedMemBytes: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, clusterPeakTrackedMemBytes: {sum:
  0, max: 0, min: 0, sumOfSquares: 0}}, queryPlanner: {hasSortStage:
  {true: 0, false: 2}, usedDisk: {true: 0, false: 2},
  fromMultiPlanner: {true: 0, false: 2}, fromPlanCache: {true: 0,
  false: 2}, planningTimeMicros: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, costBasedRanker: {cardinalityEstimationMethods:
  {Histogram: 0, Sampling: 0, Heuristics: 0, Mixed: 0, Metadata: 0,
  Code: 0}, nDocsSampled: {sum: 0, max: 0, min: 0, sumOfSquares:
  0}}}, writes: {nMatched: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  nUpserted: {sum: 0, max: 0, min: 0, sumOfSquares: 0}, nModified:
  {sum: 0, max: 0, min: 0, sumOfSquares: 0}, nDeleted: {sum: 0, max:
  0, min: 0, sumOfSquares: 0}, nInserted: {sum: 4, max: 3, min: 1,
  sumOfSquares: 10}, nUpdateOps: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, nDeleteOps: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, keysInserted: {sum: 4, max: 3, min: 1,
  sumOfSquares: 10}, keysDeleted: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}}, firstSeenTimestamp: 2026-08-14T17:36:01.963Z,
  latestSeenTimestamp: 2026-08-14T17:36:06.907Z}, asOf:
  2026-08-14T17:36:19.194Z}"}
}
{
  "t":{"$date":"2026-08-14T13:36:19.195-04:00"},"s":"D3",
  "c":"QRYSTATS", "id":7808301, "ctx":"conn12","msg":"Logging all
  outputs of $queryStats","attr":{"thisOutput":"{key: {queryShape:
  {cmdNs: {db: \"NDXwsPk1xffftPK7Ga+NkvqvpzJ2HsQo6Y0HWzKLUfE=\",
  coll: \"v1pv8qfNsL3bTnmkylPZQV8I0uGOyLulAWaRDNyL9W4=\"}, command:
  \"delete\", q: {9E+xqjUFAszhgGsn+U4PFNBgyA1Ll2bJ5e3v7rodohk=: {$eq:
  \"?string\"}}, limit: 0}, client: {application: {name: \"MongoDB
  Shell\"}, driver: {name: \"MongoDB Internal Client\", version:
  \"9.0.0-alpha0-b10821b6\"}, os: {type: \"Darwin\", name: \"Mac OS
  X\", architecture: \"arm64\", version: \"25.6.0\"}},
  collectionType: \"collection\", ordered: true,
  bypassDocumentValidation: false}, keyHash:
  \"bqVytbpyg+imenCQobnyM267Ez1B8wUukO/UoaomdA4=\", queryShapeHash:
  \"3729DA1407C3F88AC6E2DDA9756A044F28AB9EB13105EF9A35B2B2EF9E8B0436\",
  metrics: {lastExecutionMicros: 213, execCount: 1, totalExecMicros:
  {sum: 213, max: 213, min: 213, sumOfSquares: 45369},
  workingTimeMillis: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  cursor: {firstResponseExecMicros: {sum: 213, max: 213, min: 213,
  sumOfSquares: 45369}}, queryExec: {docsReturned: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, keysExamined: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, docsExamined: {sum: 4, max: 4, min: 4,
  sumOfSquares: 16}, bytesRead: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, readTimeMicros: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, delinquentAcquisitions: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, totalAcquisitionDelinquencyMillis: {sum: 0, max:
  0, min: 0, sumOfSquares: 0}, maxAcquisitionDelinquencyMillis: {sum:
  0, max: 0, min: 0, sumOfSquares: 0}, totalTimeQueuedMicros: {sum:
  0, max: 0, min: 0, sumOfSquares: 0}, totalAdmissions: {sum: 0, max:
  0, min: 0, sumOfSquares: 0}, wasLoadShed: {true: 0, false: 1},
  wasDeprioritized: {true: 0, false: 1}, wasMarkedNonDeprioritizable:
  {true: 0, false: 1}, numInterruptChecksPerSec: {sum: 0, max: 0,
  min: 0, sumOfSquares: 0}, overdueInterruptApproxMaxMillis: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, peakTrackedMemBytes: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, clusterPeakTrackedMemBytes: {sum:
  0, max: 0, min: 0, sumOfSquares: 0}}, queryPlanner: {hasSortStage:
  {true: 0, false: 1}, usedDisk: {true: 0, false: 1},
  fromMultiPlanner: {true: 0, false: 1}, fromPlanCache: {true: 0,
  false: 1}, planningTimeMicros: {sum: 115, max: 115, min: 115,
  sumOfSquares: 13225}, costBasedRanker:
  {cardinalityEstimationMethods: {Histogram: 0, Sampling: 0,
  Heuristics: 0, Mixed: 0, Metadata: 0, Code: 0}, nDocsSampled: {sum:
  0, max: 0, min: 0, sumOfSquares: 0}}}, writes: {nMatched: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, nUpserted: {sum: 0, max: 0, min:
  0, sumOfSquares: 0}, nModified: {sum: 0, max: 0, min: 0,
  sumOfSquares: 0}, nDeleted: {sum: 1, max: 1, min: 1, sumOfSquares:
  1}, nInserted: {sum: 0, max: 0, min: 0, sumOfSquares: 0},
  nUpdateOps: {sum: 0, max: 0, min: 0, sumOfSquares: 0}, nDeleteOps:
  {sum: 1, max: 1, min: 1, sumOfSquares: 1}, keysInserted: {sum: 0,
  max: 0, min: 0, sumOfSquares: 0}, keysDeleted: {sum: 1, max: 1,
  min: 1, sumOfSquares: 1}}, firstSeenTimestamp:
  2026-08-14T17:36:08.139Z, latestSeenTimestamp:
  2026-08-14T17:36:08.139Z}, asOf: 2026-08-14T17:36:19.195Z}"}
}
// Additional $queryStats output...

Learn More

Back

$queryStats

Next

$rankFusion

On this page