MongoDB Enterprise mongos> db.finefoods.find({userId: “A10CJYBXXJ2BKB”}).explain(1)
{
	“queryPlanner” : {
		“mongosPlannerVersion” : 1,
		“winningPlan” : {
			“stage” : “SHARD_MERGE”,
			“shards” : [
				{
					“shardName” : “shard01”,
					“connectionString” : “shard01/localhost:30001,localhost:30002,localhost:30003”,
					“serverInfo” : {
						“host” : “Christophers-MacBook-Pro.local”,
						“port” : 30001,
						“version” : “4.0.24”,
						“gitVersion” : “9df1b3a80f39cf7e7ccd6264a207518426a524f6”
					},
					“plannerVersion” : 1,
					“namespace” : “test.finefoods”,
					“indexFilterSet” : false,
					“parsedQuery” : {
						“userId” : {
							“$eq” : “A10CJYBXXJ2BKB”
						}
					},
					“winningPlan” : {
						“stage” : “SHARDING_FILTER”,
						“inputStage” : {
							“stage” : “COLLSCAN”,
							“filter” : {
								“userId” : {
									“$eq” : “A10CJYBXXJ2BKB”
								}
							},
							“direction” : “forward”
						}
					},
					“rejectedPlans” : [ ]
				},
				{
					“shardName” : “shard03",
					“connectionString” : “shard03/localhost:30007,localhost:30008,localhost:30009",
					“serverInfo” : {
						“host” : “Christophers-MacBook-Pro.local”,
						“port” : 30007,
						“version” : “4.0.24",
						“gitVersion” : “9df1b3a80f39cf7e7ccd6264a207518426a524f6"
					},
					“plannerVersion” : 1,
					“namespace” : “test.finefoods”,
					“indexFilterSet” : false,
					“parsedQuery” : {
						“userId” : {
							“$eq” : “A10CJYBXXJ2BKB”
						}
					},
					“winningPlan” : {
						“stage” : “SHARDING_FILTER”,
						“inputStage” : {
							“stage” : “COLLSCAN”,
							“filter” : {
								“userId” : {
									“$eq” : “A10CJYBXXJ2BKB”
								}
							},
							“direction” : “forward”
						}
					},
					“rejectedPlans” : [ ]
				},
				{
					“shardName” : “shard02”,
					“connectionString” : “shard02/localhost:30004,localhost:30005,localhost:30006”,
					“serverInfo” : {
						“host” : “Christophers-MacBook-Pro.local”,
						“port” : 30004,
						“version” : “4.0.24”,
						“gitVersion” : “9df1b3a80f39cf7e7ccd6264a207518426a524f6”
					},
					“plannerVersion” : 1,
					“namespace” : “test.finefoods”,
					“indexFilterSet” : false,
					“parsedQuery” : {
						“userId” : {
							“$eq” : “A10CJYBXXJ2BKB”
						}
					},
					“winningPlan” : {
						“stage” : “SHARDING_FILTER”,
						“inputStage” : {
							“stage” : “COLLSCAN”,
							“filter” : {
								“userId” : {
									“$eq” : “A10CJYBXXJ2BKB”
								}
							},
							“direction” : “forward”
						}
					},
					“rejectedPlans” : [ ]
				}
			]
		}
	},
	“executionStats” : {
		“nReturned” : 1,
		“executionTimeMillis” : 61,
		“totalKeysExamined” : 0,
		“totalDocsExamined” : 285000,
		“executionStages” : {
			“stage” : “SHARD_MERGE”,
			“nReturned” : 1,
			“executionTimeMillis” : 61,
			“totalKeysExamined” : 0,
			“totalDocsExamined” : 285000,
			“totalChildMillis” : NumberLong(148),
			“shards” : [
				{
					“shardName” : “shard01",
					“executionSuccess” : true,
					“executionStages” : {
						“stage” : “SHARDING_FILTER”,
						“nReturned” : 1,
						“executionTimeMillisEstimate” : 22,
						“works” : 55649,
						“advanced” : 1,
						“needTime” : 55647,
						“needYield” : 0,
						“saveState” : 435,
						“restoreState” : 435,
						“isEOF” : 1,
						“invalidates” : 0,
						“chunkSkips” : 0,
						“inputStage” : {
							“stage” : “COLLSCAN”,
							“filter” : {
								“userId” : {
									“$eq” : “A10CJYBXXJ2BKB”
								}
							},
							“nReturned” : 1,
							“executionTimeMillisEstimate” : 22,
							“works” : 55649,
							“advanced” : 1,
							“needTime” : 55647,
							“needYield” : 0,
							“saveState” : 435,
							“restoreState” : 435,
							“isEOF” : 1,
							“invalidates” : 0,
							“direction” : “forward”,
							“docsExamined” : 55647
						}
					}
				},
				{
					“shardName” : “shard03”,
					“executionSuccess” : true,
					“executionStages” : {
						“stage” : “SHARDING_FILTER”,
						“nReturned” : 0,
						“executionTimeMillisEstimate” : 44,
						“works” : 114528,
						“advanced” : 0,
						“needTime” : 114527,
						“needYield” : 0,
						“saveState” : 895,
						“restoreState” : 895,
						“isEOF” : 1,
						“invalidates” : 0,
						“chunkSkips” : 0,
						“inputStage” : {
							“stage” : “COLLSCAN”,
							“filter” : {
								“userId” : {
									“$eq” : “A10CJYBXXJ2BKB”
								}
							},
							“nReturned” : 0,
							“executionTimeMillisEstimate” : 32,
							“works” : 114528,
							“advanced” : 0,
							“needTime” : 114527,
							“needYield” : 0,
							“saveState” : 895,
							“restoreState” : 895,
							“isEOF” : 1,
							“invalidates” : 0,
							“direction” : “forward”,
							“docsExamined” : 114526
						}
					}
				},
				{
					“shardName” : “shard02",
					“executionSuccess” : true,
					“executionStages” : {
						“stage” : “SHARDING_FILTER”,
						“nReturned” : 0,
						“executionTimeMillisEstimate” : 45,
						“works” : 114829,
						“advanced” : 0,
						“needTime” : 114828,
						“needYield” : 0,
						“saveState” : 897,
						“restoreState” : 897,
						“isEOF” : 1,
						“invalidates” : 0,
						“chunkSkips” : 0,
						“inputStage” : {
							“stage” : “COLLSCAN”,
							“filter” : {
								“userId” : {
									“$eq” : “A10CJYBXXJ2BKB”
								}
							},
							“nReturned” : 0,
							“executionTimeMillisEstimate” : 45,
							“works” : 114829,
							“advanced” : 0,
							“needTime” : 114828,
							“needYield” : 0,
							“saveState” : 897,
							“restoreState” : 897,
							“isEOF” : 1,
							“invalidates” : 0,
							“direction” : “forward”,
							“docsExamined” : 114827
						}
					}
				}
			]
		},
		“allPlansExecution” : [
			{
				“shardName” : “shard01",
				“allPlans” : [ ]
			},
			{
				“shardName” : “shard03”,
				“allPlans” : [ ]
			},
			{
				“shardName” : “shard02",
				“allPlans” : [ ]
			}
		]
	},
	“serverInfo” : {
		“host” : “Christophers-MacBook-Pro.local”,
		“port” : 30000,
		“version” : “4.0.24”,
		“gitVersion” : “9df1b3a80f39cf7e7ccd6264a207518426a524f6”
	},
	“ok” : 1,
	“operationTime” : Timestamp(1620230291, 1),
	“$clusterTime” : {
		“clusterTime” : Timestamp(1620230291, 1),
		“signature” : {
			“hash” : BinData(0,“i1XTHhGi9hSTyZYHqZnS0CgfzQM=“),
			“keyId” : NumberLong(“6956251976040448020")
		}
	}
}