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解释MongoDB Vector Search 结果

当您使用 explain 方法运行MongoDB Vector Search查询时，该查询会返回一个 BSON文档，其中包含查询计划和描述查询在内部运行方式的执行统计信息。

提示

explain 命令

语法

db.<myCollection>.explain("<verbosity>").aggregate([
   {
     "$vectorSearch": {
       "exact": true | false,
       "filter": {<filter-specification>},
       "index": "<index-name>",
       "limit": <number-of-results>,
       "numCandidates": <number-of-candidates>,
       "path": "<field-to-search>",
       "queryVector": [<array-of-numbers>],
       "explainOptions": {
         "traceDocumentIds": [<array-of-document-IDs>]
       }
     }
   }
])

详细程度

详细模式控制 explain 的行为和返回的信息量。值可以是以下之一，按详细程度降序排列：

allPlansExecution	有关查询计划的信息，包括 `stats` 字段，其中包含查询的执行统计信息。包括在计划选择期间捕获的部分执行数据。
executionStats	有关查询计划的信息，包括 `stats` 字段，其中包含查询的执行统计信息。
queryPlanner（默认）	有关查询计划的信息。不包括 `stats` 字段，其中包含查询的执行统计信息。

提示

Verbosity 模式

解释结果

explain 方法返回包含以下字段的BSON文档。

选项	类型	必要性	用途
`collectors`	文档	Optional	描述收集器的执行统计信息。
`metadata`	文档	Optional	包含有用的元数据。
`query`	文档	Optional	描述查询的执行统计信息。它不存在于 `indexPartitionExplain` 的顶层。
`resultMaterialization`	文档	Optional	有关在查询执行后检索每个文档数据的详细信息。`queryPlanner` 详细模式不会返回此值。
`resourceUsage`	文档	Optional	详细说明执行查询时的资源使用情况。对于 `queryPlanner` 详细模式，不会返回此值。
`vectorTracing`	对象数组	Optional	跟踪有关指定文档中向量的详细信息，如下所示： MongoDB Vector Search 在查询执行期间是否访问过该向量，该向量是否出现在MongoDB Vector Search 结果设立，如果没有，为何删除该向量。向量是否总体可访问，因为由于分层可导航小世界的概率性质，某些向量可能无法访问。
`luceneVectorSegmentStats`	对象数组	Optional	查询执行的每个 Lucene`$vectorSearch` 分段的详细信息。

`collectors`

collectors 是包含以下字段的BSON文档：

字段	类型	必要性	用途
`allCollectorStats`	文档	必需	查询的所有收集器的统计信息。报告的统计信息表示查询中使用的所有收集器的最大值或所有子收集器的统计信息总和。计时统计信息相加求和，以反映整个查询中所有收集器所花费的总时间。要学习；了解详情，请参阅 `allCollectorStats`。

`allCollectorStats`

allCollectorStats 是一个BSON文档，描述查询中指定的所有收集器的收集器统计信息。它包含以下键：

字段	说明
`collect`	追踪收集器收集的结果数量和持续时间。
`competitiveIterator`	统计信息跟踪从收集器请求 `competitiveIterator` 的总持续时间和次数。
`setScorer`	统计信息跟踪在收集器上设置记分器的总持续时间和次数。

`metadata`

metadata 包含有用的元数据，例如：

字段	类型	必要性	用途
`mongotVersion`	字符串	Optional	`mongot` 的当前版本。
`mongotHostName`	字符串	Optional	用于标识 `mongot` 主机的人类可读标签。
`indexName`	字符串	Optional	查询中使用的MongoDB Vector Search索引。
`cursorOptions`	文档	Optional	为 `mongot` 提供的游标选项。
`totalLuceneDocs`	整型	Optional	索引中的文档总数（包括已删除的文档）。

`query`

explain 响应是一个 BSON 文档，其中的键和值描述了查询的执行统计数据。结果集中的 explain 文档包含以下字段：

字段	类型	必要性	用途
`path`	字符串	Optional	所查询的 embedding 字段的路径（前提是它不是根）。
`type`	字符串	必需	向量搜索查询类型的名称。有关更多信息，请参阅 `query`。
`args`	文档	必需	向量搜索查询信息。有关更多信息，请参阅 `query`。
`stats`	文档	Optional	如果 `explain` 以 `executionStats` 或 `allPlansExecution` 的详细程度运行，则 `stats` 查询。

`args`

解释响应包含如何在内部执行查询的信息。args字段包括以下详细信息：

查询类型
每种查询类型的结构化摘要示例
结构化摘要中的查询选项

以下部分描述了查询类型和结构化摘要中的字段：

WrappedKnnQuery

用于组合多个查询的ANN向量搜索的包装器查询。结构化摘要包含有关以下选项的详细信息：

字段	类型	必要性	说明
`query`	阵列	必需	向量搜索中使用的子查询数组，通常包含 `KnnFloatVectorQuery` 和 `DocAndScoreQuery`。

KnnFloatVectorQuery

特定于浮点向量上的ANN搜索的查询类型。结构化摘要包含有关以下选项的详细信息：

字段	类型	必要性	说明
`field`	字符串	必需	正在搜索的向量字段路径（Field Path）。
`k`	整型	必需	要检索的最近邻数量。

DocAndScoreQuery: 一种处理文档匹配和评分的查询类型。结构化摘要通常包括有关查询执行的统计信息。

ExactVectorSearchQuery

用于新奥向量搜索的查询类型。结构化摘要包含有关以下选项的详细信息：

字段	类型	必要性	说明
`field`	字符串	必需	正在搜索的向量字段路径（Field Path）。
`similarityFunction`	字符串	必需	使用的相似度函数（`dotProduct`、`cosine` 或 `euclidean`）。
`filter`	文档	Optional	用于限制向量搜索范围的预过滤查询。

BooleanQuery: 如果您在向量搜索查询中使用预过滤器，则您的解释结果将包含 BooleanQuery 类型。要进一步学习；了解此类型的字段以及特定于预筛选查询的其他查询类型，请参阅MongoDB搜索解释页面上的查询类型。

DefaultQuery

未由其他查询显式定义的查询将使用默认查询进行序列化。结构化摘要包含有关以下选项的详细信息：

字段	类型	必要性	说明
`queryType`	字符串	必需	查询类型。

`stats`

executionStats 和 allPlansExecution 详细模式的explain 响应包含一个stats 字段，该字段包含有关查询在查询执行的各个阶段所花费的时间的信息。

时序细分

时间细分描述了与查询执行区域相关的执行统计信息。以下字段显示时间细分：

字段	类型	说明
`millisElapsed`	Long	在此区域中执行任务所花费的大致挂钟时间，包括查询的子级在此区域中花费的时间。该值是在此区域中执行任务时经过的近似毫秒数。
`invocationCounts`	文档	调用此区域中包含的任务的次数。该值是任务名称到其调用计数的映射。

查询区域

统计信息可用于以下查询领域：

选项

说明

context

与向量搜索查询执行相关的统计信息。此区域中枚举了两个任务的调用计数：

`createScorer`	评分器遍历文档并为每个文档生成分数。调用`createScorer`会创建负责评分的对象。请注意，与此任务相关的时间不是实际对文档进行评分所花费的时间。计数包括`scorerSupplier`调用次数。
`createWeight`	权重存储与查询和`IndexSearcher`关联的状态。计数包括`createWeight`调用次数。

此区域花费的时间与查询的结构有关，而不是基于迭代和评分的结果数量。

例如：

"context" : {
  "millisElapsed" : NumberDouble(4.934751),
  "invocationCounts" : {
    "createWeight" : NumberLong(1),
    "createScorer" : NumberLong(10)
  }
}

match

与遍历和匹配结果文档相关的统计信息。此统计信息显示确定下一个匹配的文档所需的时间。根据查询的性质，匹配结果所花费的时间可能会有很大差异。此区域中枚举了两个任务的调用计数：

`nextDoc`	请求前进到结果集的下一个文档。这涉及识别并移动过去的跳过，或查找下一个匹配项所需的其他任务。计数包括`nextDoc`和`advance`调用的次数。
`refineRoughMatch`	执行更彻底的匹配。某些查询以双阶段过程执行，其中首先对文档进行“粗略”匹配，仅在满足第一次粗略匹配后才使用第二个更彻底的阶段进行检查。 `refineRoughMatch`任务是双阶段进程的第二阶段。计数包括`refineRoughMatch`调用次数。

例如：

"match" : {
  "millisElapsed" : NumberDouble(4.901597),
  "invocationCounts" : {
    "nextDoc" : NumberLong(541),
    "refineRoughMatch" : NumberLong(0)
  }
}

score

与结果集中的文档评分相关的统计信息。此区域中枚举了两个任务的调用计数：

`score`	对结果集中的每个文档进行评分。计数包括`score`调用次数。
`setMinCompetitiveScore`	忽略分数低于给定值的文档。表示查询也许能够通过忽略分数低于某个非竞争阈值的文档来减少执行的评分操作数。计数包括`setMinCompetitiveScore`调用次数。

例如：

"score" : {
  "millisElapsed" : NumberDouble(3.931312),
  "invocationCounts" : {
    "score" : NumberLong(536),
    "setMinCompetitiveScore" : NumberLong(0)
  }
}

`resourceUsage`

resourceUsage 文档显示了用于运行查询的资源。它包含以下字段：

字段	类型	必要性	用途
`majorFaults`	Long	必需	主要页面错误的数量，当系统在查询执行期间无法在内存中找到所需数据，导致从磁盘等后备存储中读取数据时，就会发生这种错误。
`minorFaults`	Long	必需	次要页面错误的数量，当数据在页面缓存中，但尚未映射到进程的页表时发生。
`userTimeMs`	Long	必需	在用户空间中花费的 CPU 时间，以毫秒为单位。
`systemTimeMs`	Long	必需	在系统空间中花费的 CPU 时间，以毫秒为单位。
`maxReportingThreads`	整型	必需	在所有批处理中执行查询期间，`mongot` 使用的最大线程数。对于非并发解释查询，值为 `1`。
`numBatches`	整型	必需	处理查询时请求 `mongot` 的批处理总数。

`vectorTracing`

vectorTracing大量包含对象列表，每个文档一个对象，其中包含有关文档中向量的以下详细信息：

字段	类型	必要性	用途
`visited`	布尔	必需	指定在查询执行期间是否访问过跟踪向量的标志。
`dropReason`	字符串	可选的	删除向量的原因。仅当访问了向量并将其从结果中删除时，才会出现此问题。值可以是： `Merge` `NonCompetitiveScore` `Filter` `Rescoring`
`vectorSearchScore`	double	可选的	与向量关联的分数。仅当向量被访问时才会出现
`luceneSegment`	整型	必需	向量所属的Lucene段号。要学习；了解详情，请参阅`luceneVectorSegmentStats` 。
`unreachable`	布尔	可选的	指定向量是否无法访问的标志。仅当向量无法访问时才会出现此问题。

`luceneVectorSegmentStats`

luceneVectorSegmentStats对象大量包含$vectorSearch 查询执行的每个 Lucene 段的细分。每个分段都由一个数字标识，并包含描述查询执行详细信息的参数。

{
  "0": {
    "executionType": "Approximate",
    "approximateTimeMillis": 0.10825,
    "filterMatchedDocsCount": 0,
    "docCount": 100
  },
  "1": {
    "executionType": "Exact",
    "exactTimeMillis": 0.10825,
    "filterMatchedDocsCount": 0,
    "docCount": 55
  },
  "2": {
    "executionType": "ApproximateToExactFallback",
    "approximateTimeMillis": 0.10825,
    "exactTimeMillis": 0.10825,
    "filterMatchedDocsCount": 0,
    "docCount": 55
  }
}

字段	类型	必要性	用途
`executionType`	字符串	必需	执行策略。值可以是以下之一： `Approximate` `Exact` `ApproximateToExactFallback`
`approximateStage`	Float	可选的	近似阶段的时间（以毫秒为单位）。仅针对 `Approximate` 和 `ApproximateFallbackToExact` 执行类型返回此值。
`exactStage`	Float	可选的	Exact 阶段的时间（以毫秒为单位）。仅针对 `Exact` 和 `ApproximateFallbackToExact` 执行类型返回此值。
`filterMatchedDocsCount`	整型	Optional	如果您在查询中指定了前置筛选器，则为与查询过滤匹配的文档数。
`docCount`	整型	必需	该分段中的文档总数。

示例

以下示例对示例ANN 和 ENN 查询使用 explain 方法。如果要在自己的环境中运行以下示例，则必须首先完成MongoDB Vector Search 快速入门，使用mongosh。

`allPlansExecution`

以下示例对plot_embedding_voyage_3_large 字段的 ANN 和 ENN向量搜索查询运行所述解释方法，详细程度模式为allPlansExecution 。

db.embedded_movies.explain("allPlansExecution").aggregate([
  {
    "$vectorSearch": {
      "index": "vector_index",
      "path": "plot_embedding_voyage_3_large",
      "queryVector": QUERY_EMBEDDING,
      "numCandidates": 150,
      "limit": 10
    }
  }
])

1 {
2   explainVersion: '1',
3   stages: [
4     {
5       '$vectorSearch': {
6         index: 'vector_index',
7         path: 'plot_embedding_voyage_3_large',
8         queryVector: 'redacted',
9         numCandidates: 150,
10         limit: 10,
11         explain: {
12           query: {
13             type: 'WrappedKnnQuery',
14             args: {
15               query: [
16                 {
17                   type: 'InstrumentableKnnFloatVectorQuery',
18                   args: {
19                     field: '$type:knnVector/plot_embedding_voyage_3_large',
20                     k: 150
21                   },
22                   stats: {
23                     context: { millisElapsed: 0 },
24                     match: { millisElapsed: 0 },
25                     score: { millisElapsed: 0 }
26                   }
27                 },
28                 {
29                   type: 'DocAndScoreQuery',
30                   args: {},
31                   stats: {
32                     context: {
33                       millisElapsed: 1.378949,
34                       invocationCounts: {
35                         createWeight: Long('1'),
36                         createScorer: Long('4')
37                       }
38                     },
39                     match: {
40                       millisElapsed: 0.341389,
41                       invocationCounts: { nextDoc: Long('152') }
42                     },
43                     score: {
44                       millisElapsed: 0.205415,
45                       invocationCounts: {
46                         score: Long('150'),
47                         setMinCompetitiveScore: Long('26')
48                       }
49                     }
50                   }
51                 }
52               ]
53             },
54             stats: {
55               context: {
56                 millisElapsed: 57.285674,
57                 invocationCounts: {
58                   vectorExecution: Long('1'),
59                   createWeight: Long('1'),
60                   createScorer: Long('4')
61                 }
62               },
63               match: {
64                 millisElapsed: 0.341389,
65                 invocationCounts: { nextDoc: Long('152') }
66               },
67               score: {
68                 millisElapsed: 0.205415,
69                 invocationCounts: {
70                   score: Long('150'),
71                   setMinCompetitiveScore: Long('26')
72                 }
73               }
74             }
75           },
76           collectors: {
77             allCollectorStats: {
78               millisElapsed: 0.840381,
79               invocationCounts: {
80                 collect: Long('150'),
81                 competitiveIterator: Long('2'),
82                 setScorer: Long('2')
83               }
84             }
85           },
86           metadata: {
87             mongotVersion: '1.54.0',
88             mongotHostName: '<hostname>.mongodb.net',
89             indexName: 'vector_index',
90             lucene: { totalSegments: 2, totalDocs: 3483 }
91           },
92           resourceUsage: {
93             majorFaults: Long('0'),
94             minorFaults: Long('0'),
95             userTimeMs: Long('0'),
96             systemTimeMs: Long('0'),
97             maxReportingThreads: 1,
98             numBatches: 1
99           },
100           luceneVectorSegmentStats: [
101             {
102               id: '_0',
103               executionType: 'Approximate',
104               docCount: 1952,
105               approximateStage: { millisElapsed: 32.916505 }
106             },
107             {
108               id: '_1',
109               executionType: 'Approximate',
110               docCount: 1531,
111               approximateStage: { millisElapsed: 8.661519 }
112             }
113           ]
114         }
115       },
116       nReturned: Long('10'),
117       executionTimeMillisEstimate: Long('256')
118     },
119     {
120       '$_internalSearchIdLookup': {
121         limit: Long('10'),
122         subPipeline: [
123           { '$match': { _id: { '$eq': '_id placeholder' } } }
124         ],
125         totalDocsExamined: Long('10'),
126         totalKeysExamined: Long('10'),
127         numDocsFilteredByIdLookup: Long('0')
128       },
129       nReturned: Long('10'),
130       executionTimeMillisEstimate: Long('256')
131     }
132   ],
133   queryShapeHash: '2E39BED257F2B59D3F8652E1A81A18B1140602C4E253DED9FE208D584EA00083',
134   serverInfo: {
135     host: '<hostname>.mongodb.net',
136     port: 27017,
137     version: '8.2.1-rc1',
138     gitVersion: '3312bdcf28aa65f5930005e21c2cb130f648b8c3'
139   },
140   serverParameters: {
141     internalQueryFacetBufferSizeBytes: 104857600,
142     internalQueryFacetMaxOutputDocSizeBytes: 104857600,
143     internalLookupStageIntermediateDocumentMaxSizeBytes: 104857600,
144     internalDocumentSourceGroupMaxMemoryBytes: 104857600,
145     internalQueryMaxBlockingSortMemoryUsageBytes: 104857600,
146     internalQueryProhibitBlockingMergeOnMongoS: 0,
147     internalQueryMaxAddToSetBytes: 104857600,
148     internalDocumentSourceSetWindowFieldsMaxMemoryBytes: 104857600,
149     internalQueryFrameworkControl: 'trySbeRestricted',
150     internalQueryPlannerIgnoreIndexWithCollationForRegex: 1
151   },
152   command: {
153     aggregate: 'embedded_movies',
154     pipeline: [
155       {
156         '$vectorSearch': {
157           index: 'vector_index',
158           path: 'plot_embedding_voyage_3_large',
159           queryVector: [
160             -0.034731735,  0.008558298,   -0.0153717, -0.029912498,  0.011549547,
161             ...,
162             -0.006688767,  0.047527634,  0.040714234
163           ],
164           numCandidates: 150,
165           limit: 10
166         }
167       }
168     ],
169     cursor: {},
170     '$db': 'sample_mflix'
171   },
172   ok: 1,
173   '$clusterTime': {
174     clusterTime: Timestamp({ t: 1759341228, i: 32 }),
175     signature: {
176       hash: Binary.createFromBase64('BsaUr/khHU1Fyl5/g8htqoavlU8=', 0),
177       keyId: Long('7553982574624768005')
178     }
179   },
180   operationTime: Timestamp({ t: 1759341228, i: 32 })
181 }

db.embedded_movies.explain("allPlansExecution").aggregate([
  {
    "$vectorSearch": {
      "index": "vector_index",
      "path": "plot_embedding_voyage_3_large",
      "queryVector": QUERY_EMBEDDING,
      "exact": true,
      "limit": 10
    }
  }
])

{
  explainVersion: '1',
  stages: [
    {
      '$vectorSearch': {
        index: 'vector_index',
        path: 'plot_embedding_voyage_3_large',
        queryVector: 'redacted',
        exact: true,
        limit: 10,
        explain: {
          query: {
            type: 'ExactVectorSearchQuery',
            args: {
              field: '$type:knnVector/plot_embedding_voyage_3_large',
              similarityFunction: 'dotProduct',
              filter: {
                type: 'DefaultQuery',
                args: { queryType: 'FieldExistsQuery' },
                stats: {
                  context: {
                    millisElapsed: 0.756254,
                    invocationCounts: {
                      createWeight: Long('1'),
                      createScorer: Long('4')
                    }
                  },
                  match: {
                    millisElapsed: 3.835071,
                    invocationCounts: { nextDoc: Long('3405') }
                  },
                  score: { millisElapsed: 0 }
                }
              }
            },
            stats: {
              context: {
                millisElapsed: 1.271846,
                invocationCounts: { createWeight: Long('1'), createScorer: Long('4') }
              },
              match: {
                millisElapsed: 7.699638,
                invocationCounts: { nextDoc: Long('3405') }
              },
              score: {
                millisElapsed: 139.077653,
                invocationCounts: {
                  score: Long('3403'),
                  setMinCompetitiveScore: Long('63')
                }
              }
            }
          },
          collectors: {
            allCollectorStats: {
              millisElapsed: 146.798572,
              invocationCounts: {
                collect: Long('3403'),
                competitiveIterator: Long('2'),
                setScorer: Long('2')
              }
            }
          },
          metadata: {
            mongotVersion: '1.54.0',
            mongotHostName: '<hostname>.mongodb.net',
            indexName: 'vector_index',
            lucene: { totalSegments: 2, totalDocs: 3483 }
          },
          resourceUsage: {
            majorFaults: Long('0'),
            minorFaults: Long('0'),
            userTimeMs: Long('0'),
            systemTimeMs: Long('0'),
            maxReportingThreads: 1,
            numBatches: 1
          }
        }
      },
      nReturned: Long('10'),
      executionTimeMillisEstimate: Long('208')
    },
    {
      '$_internalSearchIdLookup': {
        limit: Long('10'),
        subPipeline: [
          { '$match': { _id: { '$eq': '_id placeholder' } } }
        ],
        totalDocsExamined: Long('10'),
        totalKeysExamined: Long('10'),
        numDocsFilteredByIdLookup: Long('0')
      },
      nReturned: Long('10'),
      executionTimeMillisEstimate: Long('208')
    }
  ],
  queryShapeHash: '2E39BED257F2B59D3F8652E1A81A18B1140602C4E253DED9FE208D584EA00083',
  serverInfo: {
    host: '<hostname>.mongodb.net',
    port: 27017,
    version: '8.2.1-rc1',
    gitVersion: '3312bdcf28aa65f5930005e21c2cb130f648b8c3'
  },
  serverParameters: {
    internalQueryFacetBufferSizeBytes: 104857600,
    internalQueryFacetMaxOutputDocSizeBytes: 104857600,
    internalLookupStageIntermediateDocumentMaxSizeBytes: 104857600,
    internalDocumentSourceGroupMaxMemoryBytes: 104857600,
    internalQueryMaxBlockingSortMemoryUsageBytes: 104857600,
    internalQueryProhibitBlockingMergeOnMongoS: 0,
    internalQueryMaxAddToSetBytes: 104857600,
    internalDocumentSourceSetWindowFieldsMaxMemoryBytes: 104857600,
    internalQueryFrameworkControl: 'trySbeRestricted',
    internalQueryPlannerIgnoreIndexWithCollationForRegex: 1
  },
  command: {
    aggregate: 'embedded_movies',
    pipeline: [
      {
        '$vectorSearch': {
          index: 'vector_index',
          path: 'plot_embedding_voyage_3_large',
          queryVector: [
            -0.034731735,  0.008558298,   -0.0153717, -0.029912498,  0.011549547,
            ...,
            -0.006688767,  0.047527634,  0.040714234
          ],
          exact: true,
          limit: 10
        }
      }
    ],
    cursor: {},
    '$db': 'sample_mflix'
  },
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1759341655, i: 1 }),
    signature: {
      hash: Binary.createFromBase64('/pUN/IbVV/OKyakbZcIug8HRS8M=', 0),
      keyId: Long('7553982574624768005')
    }
  },
  operationTime: Timestamp({ t: 1759341655, i: 1 })
}

`queryPlanner`

以下示例对plot_embedding_voyage_3_large 字段的 ANN 和 ENN向量搜索查询运行所述解释方法，详细程度模式为queryPlanner 。

db.embedded_movies.explain("queryPlanner").aggregate([
  {
    "$vectorSearch": {
      "index": "vector_index",
      "path": "plot_embedding_voyage_3_large",
      "queryVector": QUERY_EMBEDDING,
      "numCandidates": 150,
      "limit": 10
    }
  }
])

{
  explainVersion: '1',
  stages: [
    {
      '$vectorSearch': {
        index: 'vector_index',
        path: 'plot_embedding_voyage_3_large',
        queryVector: 'redacted',
        numCandidates: 150,
        limit: 10,
        explain: {
          query: {
            type: 'WrappedKnnQuery',
            args: {
              query: [
                {
                  type: 'InstrumentableKnnFloatVectorQuery',
                  args: {
                    field: '$type:knnVector/plot_embedding_voyage_3_large',
                    k: 150
                  }
                },
                { type: 'DocAndScoreQuery', args: {} }
              ]
            }
          },
          metadata: {
            mongotVersion: '1.54.0',
            mongotHostName: '<hostname>.mongodb.net',
            indexName: 'vector_index',
            lucene: { totalSegments: 2, totalDocs: 3483 }
          }
        }
      }
    },
    {
      '$_internalSearchIdLookup': {
        limit: Long('10'),
        subPipeline: [
          { '$match': { _id: { '$eq': '_id placeholder' } } }
        ]
      }
    }
  ],
  queryShapeHash: '2E39BED257F2B59D3F8652E1A81A18B1140602C4E253DED9FE208D584EA00083',
  serverInfo: {
    host: '<hostname>.mongodb.net',
    port: 27017,
    version: '8.2.1-rc1',
    gitVersion: '3312bdcf28aa65f5930005e21c2cb130f648b8c3'
  },
  serverParameters: {
    internalQueryFacetBufferSizeBytes: 104857600,
    internalQueryFacetMaxOutputDocSizeBytes: 104857600,
    internalLookupStageIntermediateDocumentMaxSizeBytes: 104857600,
    internalDocumentSourceGroupMaxMemoryBytes: 104857600,
    internalQueryMaxBlockingSortMemoryUsageBytes: 104857600,
    internalQueryProhibitBlockingMergeOnMongoS: 0,
    internalQueryMaxAddToSetBytes: 104857600,
    internalDocumentSourceSetWindowFieldsMaxMemoryBytes: 104857600,
    internalQueryFrameworkControl: 'trySbeRestricted',
    internalQueryPlannerIgnoreIndexWithCollationForRegex: 1
  },
  command: {
    aggregate: 'embedded_movies',
    pipeline: [
      {
        '$vectorSearch': {
          index: 'vector_index',
          path: 'plot_embedding_voyage_3_large',
          queryVector: [
            -0.034731735,  0.008558298,   -0.0153717, -0.029912498,  0.011549547,
            ...,
            -0.006688767,  0.047527634,  0.040714234
          ],
          numCandidates: 150,
          limit: 10
        }
      }
    ],
    cursor: {},
    '$db': 'sample_mflix'
  },
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1759341765, i: 1 }),
    signature: {
      hash: Binary.createFromBase64('rPjwbtfbjVrbcvkkN0ct/b1UYa8=', 0),
      keyId: Long('7553982574624768005')
    }
  },
  operationTime: Timestamp({ t: 1759341765, i: 1 })
}

db.embedded_movies.explain("queryPlanner").aggregate([
  {
    "$vectorSearch": {
      "index": "vector_index",
      "path": "plot_embedding_voyage_3_large",
      "queryVector": QUERY_EMBEDDING,
      "exact": true,
      "limit": 10
    }
  }
])

{
  explainVersion: '1',
  stages: [
    {
      '$vectorSearch': {
        index: 'vector_index',
        path: 'plot_embedding_voyage_3_large',
        queryVector: 'redacted',
        exact: true,
        limit: 10,
        explain: {
          query: {
            type: 'ExactVectorSearchQuery',
            args: {
              field: '$type:knnVector/plot_embedding_voyage_3_large',
              similarityFunction: 'dotProduct',
              filter: {
                type: 'DefaultQuery',
                args: { queryType: 'FieldExistsQuery' }
              }
            }
          },
          metadata: {
            mongotVersion: '1.54.0',
            mongotHostName: '<hostname>.mongodb.net',
            indexName: 'vector_index',
            lucene: { totalSegments: 2, totalDocs: 3483 }
          }
        }
      }
    },
    {
      '$_internalSearchIdLookup': {
        limit: Long('10'),
        subPipeline: [
          { '$match': { _id: { '$eq': '_id placeholder' } } }
        ]
      }
    }
  ],
  queryShapeHash: '2E39BED257F2B59D3F8652E1A81A18B1140602C4E253DED9FE208D584EA00083',
  serverInfo: {
    host: '<hostname>.mongodb.net',
    port: 27017,
    version: '8.2.1-rc1',
    gitVersion: '3312bdcf28aa65f5930005e21c2cb130f648b8c3'
  },
  serverParameters: {
    internalQueryFacetBufferSizeBytes: 104857600,
    internalQueryFacetMaxOutputDocSizeBytes: 104857600,
    internalLookupStageIntermediateDocumentMaxSizeBytes: 104857600,
    internalDocumentSourceGroupMaxMemoryBytes: 104857600,
    internalQueryMaxBlockingSortMemoryUsageBytes: 104857600,
    internalQueryProhibitBlockingMergeOnMongoS: 0,
    internalQueryMaxAddToSetBytes: 104857600,
    internalDocumentSourceSetWindowFieldsMaxMemoryBytes: 104857600,
    internalQueryFrameworkControl: 'trySbeRestricted',
    internalQueryPlannerIgnoreIndexWithCollationForRegex: 1
  },
  command: {
    aggregate: 'embedded_movies',
    pipeline: [
      {
        '$vectorSearch': {
          index: 'vector_index',
          path: 'plot_embedding_voyage_3_large',
          queryVector: [
            -0.034731735,  0.008558298,   -0.0153717, -0.029912498,  0.011549547,
            ...,
            -0.006688767,  0.047527634,  0.040714234
          ],
          exact: true,
          limit: 10
        }
      }
    ],
    cursor: {},
    '$db': 'sample_mflix'
  },
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1759342075, i: 1 }),
    signature: {
      hash: Binary.createFromBase64('jQiwcAMEmfzFnVU/pyb29TnYu0w=', 0),
      keyId: Long('7553982574624768005')
    }
  },
  operationTime: Timestamp({ t: 1759342075, i: 1 })
}

`executionStats`

以下示例对plot_embedding_voyage_3_large 字段的 ANN 和 ENN向量搜索查询运行所述解释方法，详细程度模式为executionStats 。

db.embedded_movies.explain("executionStats").aggregate([
  {
    "$vectorSearch": {
      "index": "vector_index",
      "path": "plot_embedding_voyage_3_large",
      "queryVector": QUERY_EMBEDDING,
      "numCandidates": 150,
      "limit": 10
    }
  }
])

{
  explainVersion: '1',
  stages: [
    {
      '$vectorSearch': {
        index: 'vector_index',
        path: 'plot_embedding_voyage_3_large',
        queryVector: 'redacted',
        numCandidates: 150,
        limit: 10,
        explain: {
          query: {
            type: 'WrappedKnnQuery',
            args: {
              query: [
                {
                  type: 'InstrumentableKnnFloatVectorQuery',
                  args: {
                    field: '$type:knnVector/plot_embedding_voyage_3_large',
                    k: 150
                  },
                  stats: {
                    context: { millisElapsed: 0 },
                    match: { millisElapsed: 0 },
                    score: { millisElapsed: 0 }
                  }
                },
                {
                  type: 'DocAndScoreQuery',
                  args: {},
                  stats: {
                    context: {
                      millisElapsed: 0.013013,
                      invocationCounts: {
                        createWeight: Long('1'),
                        createScorer: Long('4')
                      }
                    },
                    match: {
                      millisElapsed: 0.459619,
                      invocationCounts: { nextDoc: Long('152') }
                    },
                    score: {
                      millisElapsed: 0.179147,
                      invocationCounts: {
                        score: Long('150'),
                        setMinCompetitiveScore: Long('26')
                      }
                    }
                  }
                }
              ]
            },
            stats: {
              context: {
                millisElapsed: 7.113224,
                invocationCounts: {
                  vectorExecution: Long('1'),
                  createWeight: Long('1'),
                  createScorer: Long('4')
                }
              },
              match: {
                millisElapsed: 0.459619,
                invocationCounts: { nextDoc: Long('152') }
              },
              score: {
                millisElapsed: 0.179147,
                invocationCounts: {
                  score: Long('150'),
                  setMinCompetitiveScore: Long('26')
                }
              }
            }
          },
          collectors: {
            allCollectorStats: {
              millisElapsed: 0.868815,
              invocationCounts: {
                collect: Long('150'),
                competitiveIterator: Long('2'),
                setScorer: Long('2')
              }
            }
          },
          metadata: {
            mongotVersion: '1.54.0',
            mongotHostName: '<hostname>.mongodb.net',
            indexName: 'vector_index',
            lucene: { totalSegments: 2, totalDocs: 3483 }
          },
          resourceUsage: {
            majorFaults: Long('0'),
            minorFaults: Long('0'),
            userTimeMs: Long('0'),
            systemTimeMs: Long('0'),
            maxReportingThreads: 1,
            numBatches: 1
          },
          luceneVectorSegmentStats: [
            {
              id: '_1',
              executionType: 'Approximate',
              docCount: 1531,
              approximateStage: { millisElapsed: 2.58089 }
            },
            {
              id: '_0',
              executionType: 'Approximate',
              docCount: 1952,
              approximateStage: { millisElapsed: 3.483542 }
            }
          ]
        }
      },
      nReturned: Long('10'),
      executionTimeMillisEstimate: Long('29')
    },
    {
      '$_internalSearchIdLookup': {
        limit: Long('10'),
        subPipeline: [
          { '$match': { _id: { '$eq': '_id placeholder' } } }
        ],
        totalDocsExamined: Long('10'),
        totalKeysExamined: Long('10'),
        numDocsFilteredByIdLookup: Long('0')
      },
      nReturned: Long('10'),
      executionTimeMillisEstimate: Long('30')
    }
  ],
  queryShapeHash: '2E39BED257F2B59D3F8652E1A81A18B1140602C4E253DED9FE208D584EA00083',
  serverInfo: {
    host: '<hostname>.mongodb.net',
    port: 27017,
    version: '8.2.1-rc1',
    gitVersion: '3312bdcf28aa65f5930005e21c2cb130f648b8c3'
  },
  serverParameters: {
    internalQueryFacetBufferSizeBytes: 104857600,
    internalQueryFacetMaxOutputDocSizeBytes: 104857600,
    internalLookupStageIntermediateDocumentMaxSizeBytes: 104857600,
    internalDocumentSourceGroupMaxMemoryBytes: 104857600,
    internalQueryMaxBlockingSortMemoryUsageBytes: 104857600,
    internalQueryProhibitBlockingMergeOnMongoS: 0,
    internalQueryMaxAddToSetBytes: 104857600,
    internalDocumentSourceSetWindowFieldsMaxMemoryBytes: 104857600,
    internalQueryFrameworkControl: 'trySbeRestricted',
    internalQueryPlannerIgnoreIndexWithCollationForRegex: 1
  },
  command: {
    aggregate: 'embedded_movies',
    pipeline: [
      {
        '$vectorSearch': {
          index: 'vector_index',
          path: 'plot_embedding_voyage_3_large',
          queryVector: [
            -0.034731735,  0.008558298,   -0.0153717, -0.029912498,  0.011549547,
            ...,
            -0.006688767,  0.047527634,  0.040714234
          ],
          numCandidates: 150,
          limit: 10
        }
      }
    ],
    cursor: {},
    '$db': 'sample_mflix'
  },
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1759342175, i: 1 }),
    signature: {
      hash: Binary.createFromBase64('AZZrjVPfyyBofyQq/gzs9UBL+/Q=', 0),
      keyId: Long('7553982574624768005')
    }
  },
  operationTime: Timestamp({ t: 1759342175, i: 1 })
}

db.embedded_movies.explain("executionStats").aggregate([
  {
    "$vectorSearch": {
      "index": "vector_index",
      "path": "plot_embedding_voyage_3_large",
      "queryVector": QUERY_EMBEDDING,
      "exact": true,
      "limit": 10
    }
  }
])

{
  explainVersion: '1',
  stages: [
    {
      '$vectorSearch': {
        index: 'vector_index',
        path: 'plot_embedding_voyage_3_large',
        queryVector: 'redacted',
        exact: true,
        limit: 10,
        explain: {
          query: {
            type: 'ExactVectorSearchQuery',
            args: {
              field: '$type:knnVector/plot_embedding_voyage_3_large',
              similarityFunction: 'dotProduct',
              filter: {
                type: 'DefaultQuery',
                args: { queryType: 'FieldExistsQuery' },
                stats: {
                  context: {
                    millisElapsed: 0.037129,
                    invocationCounts: {
                      createWeight: Long('1'),
                      createScorer: Long('4')
                    }
                  },
                  match: {
                    millisElapsed: 1.128957,
                    invocationCounts: { nextDoc: Long('3405') }
                  },
                  score: { millisElapsed: 0 }
                }
              }
            },
            stats: {
              context: {
                millisElapsed: 0.061268,
                invocationCounts: { createWeight: Long('1'), createScorer: Long('4') }
              },
              match: {
                millisElapsed: 2.531393,
                invocationCounts: { nextDoc: Long('3405') }
              },
              score: {
                millisElapsed: 7.956341,
                invocationCounts: {
                  score: Long('3403'),
                  setMinCompetitiveScore: Long('63')
                }
              }
            }
          },
          collectors: {
            allCollectorStats: {
              millisElapsed: 10.004281,
              invocationCounts: {
                collect: Long('3403'),
                competitiveIterator: Long('2'),
                setScorer: Long('2')
              }
            }
          },
          metadata: {
            mongotVersion: '1.54.0',
            mongotHostName: '<hostname>.mongodb.net',
            indexName: 'vector_index',
            lucene: { totalSegments: 2, totalDocs: 3483 }
          },
          resourceUsage: {
            majorFaults: Long('0'),
            minorFaults: Long('0'),
            userTimeMs: Long('0'),
            systemTimeMs: Long('0'),
            maxReportingThreads: 1,
            numBatches: 1
          }
        }
      },
      nReturned: Long('10'),
      executionTimeMillisEstimate: Long('25')
    },
    {
      '$_internalSearchIdLookup': {
        limit: Long('10'),
        subPipeline: [
          { '$match': { _id: { '$eq': '_id placeholder' } } }
        ],
        totalDocsExamined: Long('10'),
        totalKeysExamined: Long('10'),
        numDocsFilteredByIdLookup: Long('0')
      },
      nReturned: Long('10'),
      executionTimeMillisEstimate: Long('26')
    }
  ],
  queryShapeHash: '2E39BED257F2B59D3F8652E1A81A18B1140602C4E253DED9FE208D584EA00083',
  serverInfo: {
    host: '<hostname>.mongodb.net',
    port: 27017,
    version: '8.2.1-rc1',
    gitVersion: '3312bdcf28aa65f5930005e21c2cb130f648b8c3'
  },
  serverParameters: {
    internalQueryFacetBufferSizeBytes: 104857600,
    internalQueryFacetMaxOutputDocSizeBytes: 104857600,
    internalLookupStageIntermediateDocumentMaxSizeBytes: 104857600,
    internalDocumentSourceGroupMaxMemoryBytes: 104857600,
    internalQueryMaxBlockingSortMemoryUsageBytes: 104857600,
    internalQueryProhibitBlockingMergeOnMongoS: 0,
    internalQueryMaxAddToSetBytes: 104857600,
    internalDocumentSourceSetWindowFieldsMaxMemoryBytes: 104857600,
    internalQueryFrameworkControl: 'trySbeRestricted',
    internalQueryPlannerIgnoreIndexWithCollationForRegex: 1
  },
  command: {
    aggregate: 'embedded_movies',
    pipeline: [
      {
        '$vectorSearch': {
          index: 'vector_index',
          path: 'plot_embedding_voyage_3_large',
          queryVector: [
            -0.034731735,  0.008558298,   -0.0153717, -0.029912498,  0.011549547,
            ...,
            -0.006688767,  0.047527634,  0.040714234
          ],
          exact: true,
          limit: 10
        }
      }
    ],
    cursor: {},
    '$db': 'sample_mflix'
  },
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1759342255, i: 1 }),
    signature: {
      hash: Binary.createFromBase64('sHuAxj9o8MbGe4iRz0Pv1PSi+UY=', 0),
      keyId: Long('7553982574624768005')
    }
  },
  operationTime: Timestamp({ t: 1759342255, i: 1 })
}

db.embedded_movies.explain("executionStats").aggregate([
  {
    "$vectorSearch": {
      "index": "vector_index",
      "path": "plot_embedding_voyage_3_large",
      "queryVector": QUERY_EMBEDDING,
      "numCandidates": 150,
      "limit": 10,
      "explainOptions": {
        "traceDocumentIds": [
          ObjectId('573a13d8f29313caabda6557'), ObjectId('573a1398f29313caabce98d9'), ObjectId('573a1391f29313caabcd8319'), ObjectId('573a1398f29313caabceb500'), ObjectId('573a1397f29313caabce780e')
        ]
      }
    }
  }
])

{
  explainVersion: '1',
  stages: [
    {
      '$vectorSearch': {
        index: 'vector_index',
        path: 'plot_embedding_voyage_3_large',
        queryVector: 'redacted',
        numCandidates: 150,
        limit: 10,
        explainOptions: {
          traceDocumentIds: [
            ObjectId('573a13d8f29313caabda6557'),
            ObjectId('573a1398f29313caabce98d9'),
            ObjectId('573a1391f29313caabcd8319'),
            ObjectId('573a1398f29313caabceb500'),
            ObjectId('573a1397f29313caabce780e')
          ]
        },
        explain: {
          query: {
            type: 'WrappedKnnQuery',
            args: {
              query: [
                {
                  type: 'InstrumentableKnnFloatVectorQuery',
                  args: {
                    field: '$type:knnVector/plot_embedding_voyage_3_large',
                    k: 150
                  },
                  stats: {
                    context: { millisElapsed: 0 },
                    match: { millisElapsed: 0 },
                    score: { millisElapsed: 0 }
                  }
                },
                {
                  type: 'DocAndScoreQuery',
                  args: {},
                  stats: {
                    context: {
                      millisElapsed: 0.010987,
                      invocationCounts: {
                        createWeight: Long('1'),
                        createScorer: Long('4')
                      }
                    },
                    match: {
                      millisElapsed: 0.009977,
                      invocationCounts: { nextDoc: Long('152') }
                    },
                    score: {
                      millisElapsed: 0.018875,
                      invocationCounts: {
                        score: Long('150'),
                        setMinCompetitiveScore: Long('26')
                      }
                    }
                  }
                }
              ]
            },
            stats: {
              context: {
                millisElapsed: 7.55246,
                invocationCounts: {
                  vectorExecution: Long('1'),
                  createWeight: Long('1'),
                  createScorer: Long('4')
                }
              },
              match: {
                millisElapsed: 0.009977,
                invocationCounts: { nextDoc: Long('152') }
              },
              score: {
                millisElapsed: 0.018875,
                invocationCounts: {
                  score: Long('150'),
                  setMinCompetitiveScore: Long('26')
                }
              }
            }
          },
          collectors: {
            allCollectorStats: {
              millisElapsed: 0.148807,
              invocationCounts: {
                collect: Long('150'),
                competitiveIterator: Long('2'),
                setScorer: Long('2')
              }
            }
          },
          metadata: {
            mongotVersion: '1.54.0',
            mongotHostName: '<hostname>.mongodb.net',
            indexName: 'vector_index',
            lucene: { totalSegments: 2, totalDocs: 3483 }
          },
          resourceUsage: {
            majorFaults: Long('0'),
            minorFaults: Long('0'),
            userTimeMs: Long('0'),
            systemTimeMs: Long('0'),
            maxReportingThreads: 1,
            numBatches: 1
          },
          vectorTracing: [
            {
              documentId: ObjectId('573a1391f29313caabcd8319'),
              visited: false,
              luceneSegment: '_0'
            },
            {
              documentId: ObjectId('573a1397f29313caabce780e'),
              visited: true,
              vectorSearchScore: 0.7469133734703064,
              luceneSegment: '_0'
            },
            {
              documentId: ObjectId('573a1398f29313caabce98d9'),
              visited: false,
              luceneSegment: '_0'
            },
            {
              documentId: ObjectId('573a1398f29313caabceb500'),
              visited: true,
              vectorSearchScore: 0.7521393895149231,
              luceneSegment: '_0'
            },
            {
              documentId: ObjectId('573a13d8f29313caabda6557'),
              visited: true,
              vectorSearchScore: 0.7710106372833252,
              luceneSegment: '_1'
            }
          ],
          luceneVectorSegmentStats: [
            {
              id: '_1',
              executionType: 'Approximate',
              docCount: 1531,
              approximateStage: { millisElapsed: 2.73042 }
            },
            {
              id: '_0',
              executionType: 'Approximate',
              docCount: 1952,
              approximateStage: { millisElapsed: 4.136979 }
            }
          ]
        }
      },
      nReturned: Long('10'),
      executionTimeMillisEstimate: Long('21')
    },
    {
      '$_internalSearchIdLookup': {
        limit: Long('10'),
        subPipeline: [
          { '$match': { _id: { '$eq': '_id placeholder' } } }
        ],
        totalDocsExamined: Long('10'),
        totalKeysExamined: Long('10'),
        numDocsFilteredByIdLookup: Long('0')
      },
      nReturned: Long('10'),
      executionTimeMillisEstimate: Long('22')
    }
  ],
  queryShapeHash: '2E39BED257F2B59D3F8652E1A81A18B1140602C4E253DED9FE208D584EA00083',
  serverInfo: {
    host: '<hostname>.mongodb.net',
    port: 27017,
    version: '8.2.1-rc1',
    gitVersion: '3312bdcf28aa65f5930005e21c2cb130f648b8c3'
  },
  serverParameters: {
    internalQueryFacetBufferSizeBytes: 104857600,
    internalQueryFacetMaxOutputDocSizeBytes: 104857600,
    internalLookupStageIntermediateDocumentMaxSizeBytes: 104857600,
    internalDocumentSourceGroupMaxMemoryBytes: 104857600,
    internalQueryMaxBlockingSortMemoryUsageBytes: 104857600,
    internalQueryProhibitBlockingMergeOnMongoS: 0,
    internalQueryMaxAddToSetBytes: 104857600,
    internalDocumentSourceSetWindowFieldsMaxMemoryBytes: 104857600,
    internalQueryFrameworkControl: 'trySbeRestricted',
    internalQueryPlannerIgnoreIndexWithCollationForRegex: 1
  },
  command: {
    aggregate: 'embedded_movies',
    pipeline: [
      {
        '$vectorSearch': {
          index: 'vector_index',
          path: 'plot_embedding_voyage_3_large',
          queryVector: [
            -0.034731735,  0.008558298,   -0.0153717, -0.029912498,  0.011549547,
            ...,
            -0.006688767,  0.047527634,  0.040714234
          ],
          numCandidates: 150,
          limit: 10,
          explainOptions: {
            traceDocumentIds: [
              ObjectId('573a13d8f29313caabda6557'),
              ObjectId('573a1398f29313caabce98d9'),
              ObjectId('573a1391f29313caabcd8319'),
              ObjectId('573a1398f29313caabceb500'),
              ObjectId('573a1397f29313caabce780e')
            ]
          }
        }
      }
    ],
    cursor: {},
    '$db': 'sample_mflix'
  },
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1759343038, i: 1 }),
    signature: {
      hash: Binary.createFromBase64('E3FSIwLHavtFVMsmuqJM5reQc4I=', 0),
      keyId: Long('7553982574624768005')
    }
  },
  operationTime: Timestamp({ t: 1759343038, i: 1 })
}

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使用兼容视图

1	{
2	explainVersion: '1',
3	stages: [
4	{
5	'$vectorSearch': {
6	index: 'vector_index',
7	path: 'plot_embedding_voyage_3_large',
8	queryVector: 'redacted',
9	numCandidates: 150,
10	limit: 10,
11	explain: {
12	query: {
13	type: 'WrappedKnnQuery',
14	args: {
15	query: [
16	{
17	type: 'InstrumentableKnnFloatVectorQuery',
18	args: {
19	field: '$type:knnVector/plot_embedding_voyage_3_large',
20	k: 150
21	},
22	stats: {
23	context: { millisElapsed: 0 },
24	match: { millisElapsed: 0 },
25	score: { millisElapsed: 0 }
26	}
27	},
28	{
29	type: 'DocAndScoreQuery',
30	args: {},
31	stats: {
32	context: {
33	millisElapsed: 1.378949,
34	invocationCounts: {
35	createWeight: Long('1'),
36	createScorer: Long('4')
37	}
38	},
39	match: {
40	millisElapsed: 0.341389,
41	invocationCounts: { nextDoc: Long('152') }
42	},
43	score: {
44	millisElapsed: 0.205415,
45	invocationCounts: {
46	score: Long('150'),
47	setMinCompetitiveScore: Long('26')
48	}
49	}
50	}
51	}
52	]
53	},
54	stats: {
55	context: {
56	millisElapsed: 57.285674,
57	invocationCounts: {
58	vectorExecution: Long('1'),
59	createWeight: Long('1'),
60	createScorer: Long('4')
61	}
62	},
63	match: {
64	millisElapsed: 0.341389,
65	invocationCounts: { nextDoc: Long('152') }
66	},
67	score: {
68	millisElapsed: 0.205415,
69	invocationCounts: {
70	score: Long('150'),
71	setMinCompetitiveScore: Long('26')
72	}
73	}
74	}
75	},
76	collectors: {
77	allCollectorStats: {
78	millisElapsed: 0.840381,
79	invocationCounts: {
80	collect: Long('150'),
81	competitiveIterator: Long('2'),
82	setScorer: Long('2')
83	}
84	}
85	},
86	metadata: {
87	mongotVersion: '1.54.0',
88	mongotHostName: '<hostname>.mongodb.net',
89	indexName: 'vector_index',
90	lucene: { totalSegments: 2, totalDocs: 3483 }
91	},
92	resourceUsage: {
93	majorFaults: Long('0'),
94	minorFaults: Long('0'),
95	userTimeMs: Long('0'),
96	systemTimeMs: Long('0'),
97	maxReportingThreads: 1,
98	numBatches: 1
99	},
100	luceneVectorSegmentStats: [
101	{
102	id: '_0',
103	executionType: 'Approximate',
104	docCount: 1952,
105	approximateStage: { millisElapsed: 32.916505 }
106	},
107	{
108	id: '_1',
109	executionType: 'Approximate',
110	docCount: 1531,
111	approximateStage: { millisElapsed: 8.661519 }
112	}
113	]
114	}
115	},
116	nReturned: Long('10'),
117	executionTimeMillisEstimate: Long('256')
118	},
119	{
120	'$_internalSearchIdLookup': {
121	limit: Long('10'),
122	subPipeline: [
123	{ '$match': { _id: { '$eq': '_id placeholder' } } }
124	],
125	totalDocsExamined: Long('10'),
126	totalKeysExamined: Long('10'),
127	numDocsFilteredByIdLookup: Long('0')
128	},
129	nReturned: Long('10'),
130	executionTimeMillisEstimate: Long('256')
131	}
132	],
133	queryShapeHash: '2E39BED257F2B59D3F8652E1A81A18B1140602C4E253DED9FE208D584EA00083',
134	serverInfo: {
135	host: '<hostname>.mongodb.net',
136	port: 27017,
137	version: '8.2.1-rc1',
138	gitVersion: '3312bdcf28aa65f5930005e21c2cb130f648b8c3'
139	},
140	serverParameters: {
141	internalQueryFacetBufferSizeBytes: 104857600,
142	internalQueryFacetMaxOutputDocSizeBytes: 104857600,
143	internalLookupStageIntermediateDocumentMaxSizeBytes: 104857600,
144	internalDocumentSourceGroupMaxMemoryBytes: 104857600,
145	internalQueryMaxBlockingSortMemoryUsageBytes: 104857600,
146	internalQueryProhibitBlockingMergeOnMongoS: 0,
147	internalQueryMaxAddToSetBytes: 104857600,
148	internalDocumentSourceSetWindowFieldsMaxMemoryBytes: 104857600,
149	internalQueryFrameworkControl: 'trySbeRestricted',
150	internalQueryPlannerIgnoreIndexWithCollationForRegex: 1
151	},
152	command: {
153	aggregate: 'embedded_movies',
154	pipeline: [
155	{
156	'$vectorSearch': {
157	index: 'vector_index',
158	path: 'plot_embedding_voyage_3_large',
159	queryVector: [
160	-0.034731735, 0.008558298, -0.0153717, -0.029912498, 0.011549547,
161	...,
162	-0.006688767, 0.047527634, 0.040714234
163	],
164	numCandidates: 150,
165	limit: 10
166	}
167	}
168	],
169	cursor: {},
170	'$db': 'sample_mflix'
171	},
172	ok: 1,
173	'$clusterTime': {
174	clusterTime: Timestamp({ t: 1759341228, i: 32 }),
175	signature: {
176	hash: Binary.createFromBase64('BsaUr/khHU1Fyl5/g8htqoavlU8=', 0),
177	keyId: Long('7553982574624768005')
178	}
179	},
180	operationTime: Timestamp({ t: 1759341228, i: 32 })
181	}