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[ns] => test.people
            [count] => 47
            [size] => 8
            [avgObjSize] => 0.17021276595745
            [storageSize] => 12
            [numExtents] => 1
            [nindexes] => 1
            [lastExtentSize] => 12
            [paddingFactor] => 1
            [systemFlags] => 1
            [userFlags] => 0
            [totalIndexSize] => 7
            [indexSizes] => Array
                (
                    [_id_] => 7
                )

            [ok] => 1

高手能否給詳解一下。這些數(shù)據(jù)分別是什麼，代表了數(shù)據(jù)庫怎麼樣的運行狀況，謝謝?。?！