0
我有以下收集geo用以下指標：MongoDB的查詢超時
> db.geo.getIndexes();
[
{
"v" : 1,
"key" : {
"_id" : 1
},
"name" : "_id_",
"ns" : "geospatial.geo"
},
{
"v" : 1,
"key" : {
"checkin_id" : -1
},
"name" : "checkin_id_-1",
"ns" : "geospatial.geo"
},
{
"v" : 1,
"key" : {
"loc" : "2dsphere",
"created_at" : -1,
"user_id" : 1
},
"name" : "loc_2dsphere_created_at_-1_user_id_1",
"ns" : "geospatial.geo",
"2dsphereIndexVersion" : 2
},
{
"v" : 1,
"key" : {
"created_at" : -1
},
"name" : "created_at_-1",
"ns" : "geospatial.geo",
"expireAfterSeconds" : 31557600
},
{
"v" : 1,
"key" : {
"loc" : "2dsphere",
"created_at" : 1
},
"name" : "loc_2dsphere_created_at_1",
"ns" : "geospatial.geo",
"background" : true,
"2dsphereIndexVersion" : 2
}
]
但運行此查詢：
db.geo.find(
{
loc:
{ $near :
{
$geometry: { type: "Point", coordinates: [ -73.9667, 40.78 ] },
$minDistance: 1000,
$maxDistance: 5000
}
},
created_at: { $gte : new ISODate("2017-06-23T00:00:00Z") }
}
)
OR
db.geo.distinct(
"user_id",
{
loc:
{ $near :
{
$geometry: { type: "Point", coordinates: [ -73.9667, 40.78 ] },
$maxDistance: 16093.4
}
},
created_at: { $gte : new ISODate("2017-06-23T00:00:00Z") }
}
).length
它只是超時，並從不處理。任何想法，我在這裏失蹤與索引？這個系列中有74m +文件。
樣本文檔：
{
"_id" : ObjectId("59740de9e5bfa822388b4567"),
"checkin_id" : XXXXX,
"user_id" : XXXX,
"created_at" : ISODate("2017-07-23T02:44:36.000Z"),
"loc" : {
"type" : "Point",
"coordinates" : [
-88.2165,
42.3718
]
}
}
UPDATE： 這裏是executionStats結果：
{
"cursor" : "S2NearCursor",
"isMultiKey" : false,
"n" : 57740,
"nscannedObjects" : 77737,
"nscanned" : 200823,
"nscannedObjectsAllPlans" : 123823,
"nscannedAllPlans" : 300660,
"scanAndOrder" : false,
"indexOnly" : false,
"nYields" : 0,
"nChunkSkips" : 0,
"millis" : 1514,
"indexBounds" : {
},
"allPlans" : [
{
"cursor" : "S2NearCursor",
"isMultiKey" : false,
"n" : 57740,
"nscannedObjects" : 77737,
"nscanned" : 200823,
"scanAndOrder" : false,
"indexOnly" : false,
"nChunkSkips" : 0,
"indexBounds" : {
}
},
{
"cursor" : "S2NearCursor",
"isMultiKey" : false,
"n" : 101,
"nscannedObjects" : 46086,
"nscanned" : 99837,
"scanAndOrder" : false,
"indexOnly" : false,
"nChunkSkips" : 0,
"indexBounds" : {
}
}
],
"server" : "ut-geobrain-01:27017",
"filterSet" : false,
"stats" : {
"type" : "GEO_NEAR_2DSPHERE",
"works" : 258567,
"yields" : 0,
"unyields" : 0,
"invalidates" : 0,
"advanced" : 57740,
"needTime" : 0,
"needFetch" : 0,
"isEOF" : 1,
"children" : [ ]
}
}
您是否嘗試運行您用'.explain（「executionStats」）'查詢來嘗試和數字o發生了什麼事？ – Kdawg
**多個**'「2dsphere」'索引不是一個好主意。例如，集合'$ geoNear'不支持在集合上存在多於**一個**地理空間索引，因爲實際上沒有辦法指定哪個字段在該操作中用於地理空間查詢。所以你應該重新考慮多個索引，並提出一個**，它適合你最常見的需求。 –
我在這裏對你在這裏和你對現有答案的評論中顯示的結果有點困惑，因爲這兩個查詢似乎在兩秒鐘內完成（在你的問題中爲1514毫秒，.1483毫秒在你的評論中），除非我沒有正確記得如何解釋這些結果。你只是從shell運行這些命令而沒有收回任何東西？另外，你運行的是什麼版本的MongoDB？ – Kdawg