【MongoDB学习笔记24】MongoDB的explain和hint函数
> db.post.find({"loc.city":"ny"}).explain(){
"cursor" : "BtreeCursor loc.city_1",
"isMultiKey" : false,
"n" : 0,
"nscannedObjects" : 0,
"nscanned" : 0,
"nscannedObjectsAllPlans" : 0,
"nscannedAllPlans" : 0,
"scanAndOrder" : false,
"indexOnly" : false,
"nYields" : 0,
"nChunkSkips" : 0,
"millis" : 1,
"indexBounds" : {
"loc.city" : [
[
"ny",
"ny"
]
]
},
"server" : "localhost.localdomain:27017",
"filterSet" : false
}
>
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