我有一个mongo文档，如下所示。
{
"_id":"1234",
"empId" : "1234"
"manager":"456",
"name" :"Mike",
"mgrHierarchy":"456>678>789>901>999",
"mgrs": [
"456",
"678",
"789",
"901",
"999"
]
}
目标是获取给定empId的层次结构。使用mgrHierarchy进行排序，以便可以轻松检索层次结构。
mgrs-将拥有从第一层到最高层的所有经理。
Mgrs和mgrHierarchy将以不同的格式保存相同的内容。
对empId，mgrHierarchy，mgrs，mgrs.0，mgrs.1，mgrs.2，mgrs.3，mgrs.4等具有索引。此集合总共有大约20个索引。
查询：-
{ "$or" : [ { "mgrs.2" : "901"} , { "_id" : { "$in" : [ "901"]}} , { "mgrs.0" : "901"} , { "mgrs.1" : "901"} , { "mgrs.4" : "901"} , { "mgrs.3" : "901"}]}).sort({ mgrHierarchy: 1 }
此查询计数返回100k。
此查询返回内存错误。
执行错误：OperationFailed：排序操作使用的次数超过最大值 33554432字节的RAM。添加索引，或指定一个较小的限制。 状态：失败。
explain（“ executionStats”）输出
{
"queryPlanner" : {
"plannerVersion" : 1,
"namespace" : "test.test",
"indexFilterSet" : false,
"parsedQuery" : {
"$or" : [
{
"_id" : {
"$eq" : "901"
}
},
{
"mgrs.0" : {
"$eq" : "901"
}
},
{
"mgrs.1" : {
"$eq" : "901"
}
},
{
"mgrs.2" : {
"$eq" : "901"
}
},
{
"mgrs.3" : {
"$eq" : "901"
}
},
{
"mgrs.4" : {
"$eq" : "901"
}
}
]
},
"winningPlan" : {
"stage" : "SUBPLAN",
"inputStage" : {
"stage" : "PROJECTION",
"transformBy" : {
},
"inputStage" : {
"stage" : "SORT",
"sortPattern" : {
"mgrHierarchy" : 1
},
"inputStage" : {
"stage" : "SORT_KEY_GENERATOR",
"inputStage" : {
"stage" : "FETCH",
"inputStage" : {
"stage" : "OR",
"inputStages" : [
{
"stage" : "IXSCAN",
"keyPattern" : {
"_id" : 1
},
"indexName" : "_id_",
"isMultiKey" : false,
"isUnique" : true,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 1,
"direction" : "forward",
"indexBounds" : {
"_id" : [
"[\"901\", \"901\"]"
]
}
},
{
"stage" : "IXSCAN",
"keyPattern" : {
"mgrs.0" : 1
},
"indexName" : "mgrs.0_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"mgrs.0" : [ ]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.0" : [
"[\"901\", \"901\"]"
]
}
},
{
"stage" : "IXSCAN",
"keyPattern" : {
"mgrs.1" : 1
},
"indexName" : "mgrs.1_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"mgrs.1" : [ ]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.1" : [
"[\"901\", \"901\"]"
]
}
},
{
"stage" : "IXSCAN",
"keyPattern" : {
"mgrs.2" : 1
},
"indexName" : "mgrs.2_1",
"isMultiKey" : true,
"multiKeyPaths" : {
"mgrs.2" : [
"mgrs"
]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.2" : [
"[\"901\", \"901\"]"
]
}
},
{
"stage" : "IXSCAN",
"keyPattern" : {
"mgrs.3" : 1
},
"indexName" : "mgrs.3_1",
"isMultiKey" : true,
"multiKeyPaths" : {
"mgrs.3" : [
"mgrs"
]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.3" : [
"[\"901\", \"901\"]"
]
}
},
{
"stage" : "IXSCAN",
"keyPattern" : {
"mgrs.4" : 1
},
"indexName" : "mgrs.4_1",
"isMultiKey" : true,
"multiKeyPaths" : {
"mgrs.4" : [
"mgrs"
]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.4" : [
"[\"901\", \"901\"]"
]
}
}
]
}
}
}
}
}
},
"rejectedPlans" : [ ]
},
"executionStats" : {
"executionSuccess" : false,
"errorMessage" : "Exec error: OperationFailed: Sort operation used more than the maximum 33554432 bytes of RAM. Add an index, or specify a smaller limit., state: FAILURE",
"errorCode" : 96,
"nReturned" : 0,
"executionTimeMillis" : 1120,
"totalKeysExamined" : 47184,
"totalDocsExamined" : 47184,
"executionStages" : {
"stage" : "SUBPLAN",
"nReturned" : 0,
"executionTimeMillisEstimate" : 1109,
"works" : 47191,
"advanced" : 0,
"needTime" : 47190,
"needYield" : 0,
"saveState" : 2067,
"restoreState" : 2067,
"isEOF" : 0,
"invalidates" : 0,
"inputStage" : {
"stage" : "PROJECTION",
"nReturned" : 0,
"executionTimeMillisEstimate" : 232,
"works" : 47191,
"advanced" : 0,
"needTime" : 47190,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 0,
"invalidates" : 0,
"transformBy" : {
},
"inputStage" : {
"stage" : "SORT",
"nReturned" : 0,
"executionTimeMillisEstimate" : 221,
"works" : 47191,
"advanced" : 0,
"needTime" : 47190,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 0,
"invalidates" : 0,
"sortPattern" : {
"mgrHierarchy" : 1
},
"memUsage" : 33555113,
"memLimit" : 33554432,
"inputStage" : {
"stage" : "SORT_KEY_GENERATOR",
"nReturned" : 47184,
"executionTimeMillisEstimate" : 201,
"works" : 47190,
"advanced" : 47184,
"needTime" : 6,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 0,
"invalidates" : 0,
"inputStage" : {
"stage" : "FETCH",
"nReturned" : 47184,
"executionTimeMillisEstimate" : 141,
"works" : 47189,
"advanced" : 47184,
"needTime" : 5,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 0,
"invalidates" : 0,
"docsExamined" : 47184,
"alreadyHasObj" : 0,
"inputStage" : {
"stage" : "OR",
"nReturned" : 47184,
"executionTimeMillisEstimate" : 91,
"works" : 47189,
"advanced" : 47184,
"needTime" : 5,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 0,
"invalidates" : 0,
"dupsTested" : 47184,
"dupsDropped" : 0,
"recordIdsForgotten" : 0,
"inputStages" : [
{
"stage" : "IXSCAN",
"nReturned" : 1,
"executionTimeMillisEstimate" : 0,
"works" : 2,
"advanced" : 1,
"needTime" : 0,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 1,
"invalidates" : 0,
"keyPattern" : {
"_id" : 1
},
"indexName" : "_id_",
"isMultiKey" : false,
"isUnique" : true,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 1,
"direction" : "forward",
"indexBounds" : {
"_id" : [
"[\"901\", \"901\"]"
]
},
"keysExamined" : 1,
"seeks" : 1,
"dupsTested" : 0,
"dupsDropped" : 0,
"seenInvalidated" : 0
},
{
"stage" : "IXSCAN",
"nReturned" : 22,
"executionTimeMillisEstimate" : 0,
"works" : 23,
"advanced" : 22,
"needTime" : 0,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 1,
"invalidates" : 0,
"keyPattern" : {
"mgrs.0" : 1
},
"indexName" : "mgrs.0_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"mgrs.0" : [ ]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.0" : [
"[\"901\", \"901\"]"
]
},
"keysExamined" : 22,
"seeks" : 1,
"dupsTested" : 0,
"dupsDropped" : 0,
"seenInvalidated" : 0
},
{
"stage" : "IXSCAN",
"nReturned" : 349,
"executionTimeMillisEstimate" : 0,
"works" : 350,
"advanced" : 349,
"needTime" : 0,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 1,
"invalidates" : 0,
"keyPattern" : {
"mgrs.1" : 1
},
"indexName" : "mgrs.1_1",
"isMultiKey" : false,
"multiKeyPaths" : {
"mgrs.1" : [ ]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.1" : [
"[\"901\", \"901\"]"
]
},
"keysExamined" : 349,
"seeks" : 1,
"dupsTested" : 0,
"dupsDropped" : 0,
"seenInvalidated" : 0
},
{
"stage" : "IXSCAN",
"nReturned" : 2859,
"executionTimeMillisEstimate" : 0,
"works" : 2860,
"advanced" : 2859,
"needTime" : 0,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 1,
"invalidates" : 0,
"keyPattern" : {
"mgrs.2" : 1
},
"indexName" : "mgrs.2_1",
"isMultiKey" : true,
"multiKeyPaths" : {
"mgrs.2" : [
"mgrs"
]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.2" : [
"[\"901\", \"901\"]"
]
},
"keysExamined" : 2859,
"seeks" : 1,
"dupsTested" : 2859,
"dupsDropped" : 0,
"seenInvalidated" : 0
},
{
"stage" : "IXSCAN",
"nReturned" : 16475,
"executionTimeMillisEstimate" : 40,
"works" : 16476,
"advanced" : 16475,
"needTime" : 0,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 1,
"invalidates" : 0,
"keyPattern" : {
"mgrs.3" : 1
},
"indexName" : "mgrs.3_1",
"isMultiKey" : true,
"multiKeyPaths" : {
"mgrs.3" : [
"mgrs"
]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.3" : [
"[\"901\", \"901\"]"
]
},
"keysExamined" : 16475,
"seeks" : 1,
"dupsTested" : 16475,
"dupsDropped" : 0,
"seenInvalidated" : 0
},
{
"stage" : "IXSCAN",
"nReturned" : 27478,
"executionTimeMillisEstimate" : 20,
"works" : 27478,
"advanced" : 27478,
"needTime" : 0,
"needYield" : 0,
"saveState" : 371,
"restoreState" : 371,
"isEOF" : 0,
"invalidates" : 0,
"keyPattern" : {
"mgrs.4" : 1
},
"indexName" : "mgrs.4_1",
"isMultiKey" : true,
"multiKeyPaths" : {
"mgrs.4" : [
"mgrs"
]
},
"isUnique" : false,
"isSparse" : false,
"isPartial" : false,
"indexVersion" : 2,
"direction" : "forward",
"indexBounds" : {
"mgrs.4" : [
"[\"901\", \"822717775\"]"
]
},
"keysExamined" : 27478,
"seeks" : 1,
"dupsTested" : 27478,
"dupsDropped" : 0,
"seenInvalidated" : 0
}
]
}
}
}
}
}
}
},
"serverInfo" : {
"host" : "test",
"port" : 10904,
"version" : "3.4.14",
"gitVersion" : "fd954412dfc10e4d1e3e2dd4fac040f8b476b268"
},
"ok" : 1
}
我有所有字段的索引，不确定为什么仍然出现此错误。任何对此的指针。