> db.eos.find({$or:[{to:"eospokerwins"},{from: "eospokerwins"}]}).limit(10).sort( { blockNumber: -1 } ).explain("executionStats")
{
    "queryPlanner" : {
        "plannerVersion" : 1,
        "namespace" : "test.eos",
        "indexFilterSet" : false,
        "parsedQuery" : {
            "$or" : [
                {
                    "from" : {
                        "$eq" : "eospokerwins"
                    }
                },
                {
                    "to" : {
                        "$eq" : "eospokerwins"
                    }
                }
            ]
        },
        "winningPlan" : {
            "stage" : "SUBPLAN",
            "inputStage" : {
                "stage" : "LIMIT",
                "limitAmount" : 10,
                "inputStage" : {
                    "stage" : "FETCH",
                    "filter" : {
                        "$or" : [
                            {
                                "from" : {
                                    "$eq" : "eospokerwins"
                                }
                            },
                            {
                                "to" : {
                                    "$eq" : "eospokerwins"
                                }
                            }
                        ]
                    },
                    "inputStage" : {
                        "stage" : "IXSCAN",
                        "keyPattern" : {
                            "blockNumber" : -1,
                            "from" : 1,
                            "to" : 1
                        },
                        "indexName" : "blockNumber_-1_from_1_to_1",
                        "isMultiKey" : false,
                        "multiKeyPaths" : {
                            "blockNumber" : [ ],
                            "from" : [ ],
                            "to" : [ ]
                        },
                        "isUnique" : false,
                        "isSparse" : false,
                        "isPartial" : false,
                        "indexVersion" : 2,
                        "direction" : "forward",
                        "indexBounds" : {
                            "blockNumber" : [
                                "[MaxKey, MinKey]"
                            ],
                            "from" : [
                                "[MinKey, MaxKey]"
                            ],
                            "to" : [
                                "[MinKey, MaxKey]"
                            ]
                        }
                    }
                }
            }
        },
        "rejectedPlans" : [ ]
    },
    "executionStats" : {
        "executionSuccess" : true,
        "nReturned" : 10,
        "executionTimeMillis" : 337169,
        "totalKeysExamined" : 4136346,
        "totalDocsExamined" : 4136346,
        "executionStages" : {
            "stage" : "SUBPLAN",
            "nReturned" : 10,
            "executionTimeMillisEstimate" : 335428,
            "works" : 4136347,
            "advanced" : 10,
            "needTime" : 4136336,
            "needYield" : 0,
            "saveState" : 35220,
            "restoreState" : 35220,
            "isEOF" : 1,
            "invalidates" : 0,
            "inputStage" : {
                "stage" : "LIMIT",
                "nReturned" : 10,
                "executionTimeMillisEstimate" : 334878,
                "works" : 4136346,
                "advanced" : 10,
                "needTime" : 4136336,
                "needYield" : 0,
                "saveState" : 35220,
                "restoreState" : 35220,
                "isEOF" : 1,
                "invalidates" : 0,
                "limitAmount" : 10,
                "inputStage" : {
                    "stage" : "FETCH",
                    "filter" : {
                        "$or" : [
                            {
                                "from" : {
                                    "$eq" : "eospokerwins"
                                }
                            },
                            {
                                "to" : {
                                    "$eq" : "eospokerwins"
                                }
                            }
                        ]
                    },
                    "nReturned" : 10,
                    "executionTimeMillisEstimate" : 334408,
                    "works" : 4136346,
                    "advanced" : 10,
                    "needTime" : 4136336,
                    "needYield" : 0,
                    "saveState" : 35220,
                    "restoreState" : 35220,
                    "isEOF" : 0,
                    "invalidates" : 0,
                    "docsExamined" : 4136346,
                    "alreadyHasObj" : 0,
                    "inputStage" : {
                        "stage" : "IXSCAN",
                        "nReturned" : 4136346,
                        "executionTimeMillisEstimate" : 4529,
                        "works" : 4136346,
                        "advanced" : 4136346,
                        "needTime" : 0,
                        "needYield" : 0,
                        "saveState" : 35220,
                        "restoreState" : 35220,
                        "isEOF" : 0,
                        "invalidates" : 0,
                        "keyPattern" : {
                            "blockNumber" : -1,
                            "from" : 1,
                            "to" : 1
                        },
                        "indexName" : "blockNumber_-1_from_1_to_1",
                        "isMultiKey" : false,
                        "multiKeyPaths" : {
                            "blockNumber" : [ ],
                            "from" : [ ],
                            "to" : [ ]
                        },
                        "isUnique" : false,
                        "isSparse" : false,
                        "isPartial" : false,
                        "indexVersion" : 2,
                        "direction" : "forward",
                        "indexBounds" : {
                            "blockNumber" : [
                                "[MaxKey, MinKey]"
                            ],
                            "from" : [
                                "[MinKey, MaxKey]"
                            ],
                            "to" : [
                                "[MinKey, MaxKey]"
                            ]
                        },
                        "keysExamined" : 4136346,
                        "seeks" : 1,
                        "dupsTested" : 0,
                        "dupsDropped" : 0,
                        "seenInvalidated" : 0
                    }
                }
            }
        }
    },
    "serverInfo" : {
        "host" : "ip-172-31-11-142",
        "port" : 27017,
        "version" : "4.0.7",
        "gitVersion" : "1b82c812a9c0bbf6dc79d5400de9ea99e6ffa025"
    },
    "ok" : 1
}
>