우리는 아래 쿼리몽고 날짜 범위 지수는
db.Comment.find(
{
$and: [
{ reportCount: { $gt: 0 } },
{ assignee: { $exists: false } },
{ creationDate: { $gt: new Date(1507831097809) } },
{ creationDate: { $lt: new Date(1508522297966) } },
{ siteId: 'MAIN' },
{ parent: { $exists: false } },
{ status: 'ACTIVE' }
]
})
.sort({ creationDate: 1 })
이 우리가 인덱스 여기
{
"v" : 2,
"key" : {
"creationDate" : 1,
"reportCount" : 1,
"label" : 1
}
}
을하는 것은 explain
결과입니다
{
"queryPlanner" : {
"plannerVersion" : 1,
"namespace" : "myNameSpace",
"indexFilterSet" : false,
"parsedQuery" : {
"$and" : [
{
"siteId" : {
"$eq" : "MAIN"
}
},
{
"status" : {
"$eq" : "ACTIVE"
}
},
{
"creationDate" : {
"$lt" : ISODate("2017-10-20T17:58:17.966Z")
}
},
{
"creationDate" : {
"$gt" : ISODate("2017-10-12T17:58:17.809Z")
}
},
{
"reportCount" : {
"$gt" : 0.0
}
},
{
"$nor" : [
{
"assignee" : {
"$exists" : true
}
}
]
},
{
"$nor" : [
{
"parent" : {
"$exists" : true
}
}
]
}
]
},
"winningPlan" : {
"stage" : "FETCH",
"filter" : {
"$and" : [
{
"siteId" : {
"$eq" : "MAIN"
}
},
{
"status" : {
"$eq" : "ACTIVE"
}
},
{
"$nor" : [
{
"assignee" : {
"$exists" : true
}
}
]
},
{
"$nor" : [
{
"parent" : {
"$exists" : true
}
}
]
}
]
},
"inputStage" : {
"stage" : "IXSCAN",
"keyPattern" : {
"creationDate" : 1.0,
"reportCount" : 1.0,
"label" : 1.0
},
"indexName" : "creationDate_1_reportCount_1_label_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"creationDate" : [],
"reportCount" : [],
"label" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"creationDate" : [
"(new Date(1507831097809), new Date(1508522297966))"
],
"reportCount" : [
"(0.0, inf.0]"
],
"label" : [
"[MinKey, MaxKey]"
]
}
}
},
"rejectedPlans" : [
{
"stage" : "SORT",
"sortPattern" : {
"creationDate" : 1.0
},
"inputStage" : {
"stage" : "SORT_KEY_GENERATOR",
"inputStage" : {
"stage" : "FETCH",
"filter" : {
"$and" : [
{
"$nor" : [
{
"parent" : {
"$exists" : true
}
}
]
},
{
"siteId" : {
"$eq" : "MAIN"
}
},
{
"status" : {
"$eq" : "ACTIVE"
}
},
{
"creationDate" : {
"$lt" : ISODate("2017-10-20T17:58:17.966Z")
}
},
{
"creationDate" : {
"$gt" : ISODate("2017-10-12T17:58:17.809Z")
}
},
{
"reportCount" : {
"$gt" : 0.0
}
},
{
"$nor" : [
{
"assignee" : {
"$exists" : true
}
}
]
}
]
},
"inputStage" : {
"stage" : "IXSCAN",
"keyPattern" : {
"parent" : 1.0
},
"indexName" : "parent_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"parent" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"parent" : [
"[null, null]"
]
}
}
}
}
},
{
"stage" : "SORT",
"sortPattern" : {
"creationDate" : 1.0
},
"inputStage" : {
"stage" : "SORT_KEY_GENERATOR",
"inputStage" : {
"stage" : "FETCH",
"filter" : {
"$and" : [
{
"$nor" : [
{
"assignee" : {
"$exists" : true
}
}
]
},
{
"siteId" : {
"$eq" : "MAIN"
}
},
{
"status" : {
"$eq" : "ACTIVE"
}
},
{
"creationDate" : {
"$lt" : ISODate("2017-10-20T17:58:17.966Z")
}
},
{
"creationDate" : {
"$gt" : ISODate("2017-10-12T17:58:17.809Z")
}
},
{
"reportCount" : {
"$gt" : 0.0
}
},
{
"$nor" : [
{
"parent" : {
"$exists" : true
}
}
]
}
]
},
"inputStage" : {
"stage" : "IXSCAN",
"keyPattern" : {
"assignee" : 1.0
},
"indexName" : "assignee_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"assignee" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"assignee" : [
"[null, null]"
]
}
}
}
}
},
{
"stage" : "SORT",
"sortPattern" : {
"creationDate" : 1.0
},
"inputStage" : {
"stage" : "SORT_KEY_GENERATOR",
"inputStage" : {
"stage" : "FETCH",
"filter" : {
"$and" : [
{
"status" : {
"$eq" : "ACTIVE"
}
},
{
"creationDate" : {
"$lt" : ISODate("2017-10-20T17:58:17.966Z")
}
},
{
"creationDate" : {
"$gt" : ISODate("2017-10-12T17:58:17.809Z")
}
},
{
"reportCount" : {
"$gt" : 0.0
}
},
{
"$nor" : [
{
"assignee" : {
"$exists" : true
}
}
]
},
{
"$nor" : [
{
"parent" : {
"$exists" : true
}
}
]
}
]
},
"inputStage" : {
"stage" : "IXSCAN",
"keyPattern" : {
"siteId" : 1.0,
"updatedDate" : 1.0,
"label" : 1.0
},
"indexName" : "siteId_1_updatedDate_1_label_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"siteId" : [],
"updatedDate" : [],
"label" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"siteId" : [
"[\"MAIN\", \"MAIN\"]"
],
"updatedDate" : [
"[MinKey, MaxKey]"
],
"label" : [
"[MinKey, MaxKey]"
]
}
}
}
}
},
{
"stage" : "SORT",
"sortPattern" : {
"creationDate" : 1.0
},
"inputStage" : {
"stage" : "SORT_KEY_GENERATOR",
"inputStage" : {
"stage" : "FETCH",
"filter" : {
"$and" : [
{
"$nor" : [
{
"parent" : {
"$exists" : true
}
}
]
},
{
"$nor" : [
{
"assignee" : {
"$exists" : true
}
}
]
},
{
"siteId" : {
"$eq" : "MAIN"
}
},
{
"status" : {
"$eq" : "ACTIVE"
}
},
{
"creationDate" : {
"$lt" : ISODate("2017-10-20T17:58:17.966Z")
}
},
{
"creationDate" : {
"$gt" : ISODate("2017-10-12T17:58:17.809Z")
}
},
{
"reportCount" : {
"$gt" : 0.0
}
}
]
},
"inputStage" : {
"stage" : "AND_SORTED",
"inputStages" : [
{
"stage" : "IXSCAN",
"keyPattern" : {
"parent" : 1.0
},
"indexName" : "parent_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"parent" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"parent" : [
"[null, null]"
]
}
},
{
"stage" : "IXSCAN",
"keyPattern" : {
"assignee" : 1.0
},
"indexName" : "assignee_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"assignee" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"assignee" : [
"[null, null]"
]
}
}
]
}
}
}
}
]
},
"executionStats" : {
"executionSuccess" : true,
"nReturned" : 19,
"executionTimeMillis" : 8,
"totalKeysExamined" : 533,
"totalDocsExamined" : 56,
"executionStages" : {
"stage" : "FETCH",
"filter" : {
"$and" : [
{
"siteId" : {
"$eq" : "MAIN"
}
},
{
"status" : {
"$eq" : "ACTIVE"
}
},
{
"$nor" : [
{
"assignee" : {
"$exists" : true
}
}
]
},
{
"$nor" : [
{
"parent" : {
"$exists" : true
}
}
]
}
]
},
"nReturned" : 19,
"executionTimeMillisEstimate" : 0,
"works" : 534,
"advanced" : 19,
"needTime" : 513,
"needYield" : 0,
"saveState" : 20,
"restoreState" : 20,
"isEOF" : 1,
"invalidates" : 0,
"docsExamined" : 56,
"alreadyHasObj" : 0,
"inputStage" : {
"stage" : "IXSCAN",
"nReturned" : 56,
"executionTimeMillisEstimate" : 0,
"works" : 533,
"advanced" : 56,
"needTime" : 476,
"needYield" : 0,
"saveState" : 20,
"restoreState" : 20,
"isEOF" : 1,
"invalidates" : 0,
"keyPattern" : {
"creationDate" : 1.0,
"reportCount" : 1.0,
"label" : 1.0
},
"indexName" : "creationDate_1_reportCount_1_label_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"creationDate" : [],
"reportCount" : [],
"label" : []
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"creationDate" : [
"(new Date(1507831097809), new Date(1508522297966))"
],
"reportCount" : [
"(0.0, inf.0]"
],
"label" : [
"[MinKey, MaxKey]"
]
},
"keysExamined" : 533,
"seeks" : 477,
"dupsTested" : 0,
"dupsDropped" : 0,
"seenInvalidated" : 0
}
}
},
"ok" : 1.0
}
쿼리는 여전히 복용
데이터를 반환하려면 700-800 밀리 초. 쿼리를 더 빠르게 실행할 수 있도록 인덱스를 어떻게 변경합니까? 고려하지 마십시오 "keysExamined" : 533, "seeks" : 477,
이 데이터입니다. 이것은 단지 테스트 데이터입니다.
색인을 사용하지만 색인의 첫 번째 필드 만 보이는 것처럼 보이십니까? 또한 multuKey
은 거짓입니까? Explain 스 플랜 출력에서
내가 조금 인덱스를 변경하고 이러한 결과가 있습니다 ' "nReturned"INDEX1 : 276, "totalKeysExamined를"(276),' Index2 \t ' "nReturned": 276 , "totalKeysExamined": 6894, "totalDocsExamined": 6894,' \t [지수는 당신이 제안] INDEX3 ' "nReturned": 276, "totalKeysExamined": 5799, "totalDocsExamined"(3615),'INDEX1인가 Index3가 더 빠를거야? 'totalDocsExamined' 란 무엇입니까? – user1324887
문서를 검사 할 때 키를 검사하는 것보다 비용이 많이 들기 때문에 totalDocsExamined가 작을수록 좋습니다. 엄지 손가락의 간단한 규칙은 이것입니다 : 가까운 totalKeysExamined가 nReturned에 가까울수록 totalDocsExamined가 더 가까워 질수록 ... 색인 범위가 좋아집니다. – glytching