【MongoDB学习笔记20】MongoDB的索引
> db.users.find({"username":"user999999"}).limit(1).explain(){
"cursor" : "BtreeCursor username_1",
"isMultiKey" : false,
"n" : 1,
"nscannedObjects" : 1,
"nscanned" : 1,
"nscannedObjectsAllPlans" : 1,
"nscannedAllPlans" : 1,
"scanAndOrder" : false,
"indexOnly" : false,
"nYields" : 0,
"nChunkSkips" : 0,
"millis" : 85,
"indexBounds" : {
"username" : [
[
"user999999",
"user999999"
]
]
},
"server" : "localhost.localdomain:27017",
"filterSet" : false
}
>
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