Collection details > db.test.stats() { "ns" : "test.test" , "count" : 11235, "size" : 15639072, "avgObjSize" : 1391.995727636849, "storageSize" : 16875520, "numExtents" : 6, "nindexes" : 1, "lastExtentSize" : 8495104, "paddingFactor" : 1, "systemFlags" : 1, "userFlags" : 0, "totalIndexSize" : 376096, "indexSizes" : { "_id_" : 376096 }, "ok" : 1 } 1. Restart mongodb 2. Run db.test.find() from (python) client. Mongostat output for version 2.2.4 2008+ connected to: 127.0.0.1 insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time 0 0 0 0 0 1 0 0m 95m 35m 6 local:0.0% 0 0|0 0|0 62b 1k 1 09:54:20 0 0 0 0 0 1 0 0m 95m 35m 0 local:0.0% 0 0|0 0|0 62b 1k 1 09:54:21 0 0 0 0 0 1 0 0m 95m 35m 0 local:0.0% 0 0|0 0|0 62b 1k 1 09:54:22 0 1 0 0 3 1 0 80m 258m 65m 11008 .:0.5% 0 0|0 0|0 231b 12m 2 09:54:23 0 0 0 0 1 1 0 80m 258m 67m 966 test:0.0% 0 0|0 0|0 104b 1m 2 09:54:24 0 0 0 0 0 1 0 80m 258m 67m 0 test:0.0% 0 0|0 0|0 62b 1k 2 09:54:25 Mongostat output from version 2.4.3 2008+ connected to: 127.0.0.1 insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time *0 *0 *0 *0 0 1|0 0 80m 300m 38m 2 local:0.0% 0 0|0 0|0 62b 2k 1 09:54:52 *0 *0 *0 *0 0 1|0 0 80m 300m 38m 0 local:0.0% 0 0|0 0|0 62b 2k 1 09:54:53 *0 1 *0 *0 1 1|0 0 160m 465m 40m 444 .:0.2% 0 0|0 0|0 105b 134k 2 09:54:54 *0 *0 *0 *0 0 1|0 0 160m 465m 41m 123 .:1.5% 0 0|0 0|0 62b 2k 2 09:54:55 *0 *0 *0 *0 0 1|0 0 160m 465m 41m 132 .:1.6% 0 0|0 0|0 62b 2k 2 09:54:56 *0 *0 *0 *0 0 1|0 0 160m 465m 42m 125 .:1.6% 0 0|0 0|0 62b 2k 2 09:54:57 *0 *0 *0 *0 0 1|0 0 160m 465m 42m 125 test:0.0% 0 0|0 0|0 62b 2k 2 09:54:58 *0 *0 *0 *0 0 1|0 0 160m 465m 43m 123 .:2.5% 0 0|0 0|0 62b 2k 2 09:54:59 *0 *0 *0 *0 0 1|0 0 160m 465m 43m 124 .:0.9% 0 0|0 0|0 62b 2k 2 09:55:00 *0 *0 *0 *0 0 1|0 0 160m 465m 44m 123 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:01 insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time *0 *0 *0 *0 0 1|0 0 160m 465m 44m 133 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:02 *0 *0 *0 *0 0 1|0 0 160m 465m 45m 123 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:03 *0 *0 *0 *0 0 1|0 0 160m 465m 45m 124 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:04 *0 *0 *0 *0 0 1|0 0 160m 465m 46m 133 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:05 *0 *0 *0 *0 0 1|0 0 160m 465m 46m 124 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:06 *0 *0 *0 *0 0 1|0 0 160m 465m 47m 124 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:07 *0 *0 *0 *0 0 1|0 0 160m 465m 47m 124 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:08 *0 *0 *0 *0 0 1|0 0 160m 465m 48m 127 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:09 *0 *0 *0 *0 0 1|0 0 160m 465m 48m 123 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:10 *0 *0 *0 *0 0 1|0 0 160m 461m 44m 116 test:0.0% 0 0|0 0|0 104b 4m 2 09:55:11 insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time *0 *0 *0 *0 1 1|0 0 160m 465m 45m 103 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:12 *0 *0 *0 *0 0 1|0 0 160m 465m 45m 123 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:13 *0 *0 *0 *0 0 1|0 0 160m 465m 46m 125 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:14 *0 *0 *0 *0 0 1|0 0 160m 465m 46m 122 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:15 *0 *0 *0 *0 0 1|0 0 160m 465m 47m 114 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:16 *0 *0 *0 *0 0 1|0 0 160m 465m 47m 123 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:17 *0 *0 *0 *0 0 1|0 0 160m 465m 48m 124 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:18 *0 *0 *0 *0 0 1|0 0 160m 465m 48m 122 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:19 *0 *0 *0 *0 0 1|0 0 160m 465m 49m 122 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:20 *0 *0 *0 *0 0 1|0 0 160m 465m 49m 124 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:21 insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time *0 *0 *0 *0 0 1|0 0 160m 465m 50m 122 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:22 *0 *0 *0 *0 0 1|0 0 160m 465m 50m 123 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:23 *0 *0 *0 *0 0 1|0 0 160m 465m 51m 123 .:0.9% 0 0|0 0|0 62b 2k 2 09:55:24 *0 *0 *0 *0 0 1|0 0 160m 465m 51m 118 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:25 *0 *0 *0 *0 0 1|0 0 160m 465m 52m 127 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:26 *0 *0 *0 *0 0 1|0 0 160m 465m 52m 122 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:27 *0 *0 *0 *0 0 1|0 0 160m 465m 53m 123 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:28 *0 *0 *0 *0 1 1|0 0 160m 465m 49m 93 .:1.5% 0 0|0 0|0 104b 4m 2 09:55:29 *0 *0 *0 *0 0 1|0 0 160m 465m 49m 124 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:30 *0 *0 *0 *0 0 1|0 0 160m 465m 50m 128 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:31 insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time *0 *0 *0 *0 0 1|0 0 160m 465m 50m 124 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:32 *0 *0 *0 *0 0 1|0 0 160m 465m 51m 124 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:33 *0 *0 *0 *0 0 1|0 0 160m 465m 51m 123 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:34 *0 *0 *0 *0 0 1|0 0 160m 465m 52m 125 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:35 *0 *0 *0 *0 0 1|0 0 160m 465m 52m 123 .:1.2% 0 0|0 0|0 62b 2k 2 09:55:36 *0 *0 *0 *0 0 1|0 0 160m 465m 53m 124 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:37 *0 *0 *0 *0 0 1|0 0 160m 465m 53m 124 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:38 *0 *0 *0 *0 0 1|0 0 160m 465m 54m 125 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:39 *0 *0 *0 *0 0 1|0 1 160m 465m 54m 126 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:40 *0 2 *0 *0 0 1|0 0 160m 465m 56m 394 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:41 insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time *0 *0 *0 *0 0 1|0 0 160m 465m 56m 124 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:42 *0 *0 *0 *0 0 1|0 0 160m 465m 57m 124 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:43 *0 *0 *0 *0 0 1|0 0 160m 465m 57m 119 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:44 *0 *0 *0 *0 0 1|0 0 160m 465m 58m 133 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:45 *0 *0 *0 *0 0 1|0 0 160m 465m 58m 123 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:46 *0 *0 *0 *0 1 1|0 0 160m 465m 54m 75 .:1.7% 0 0|0 0|0 104b 4m 2 09:55:47 *0 *0 *0 *0 0 1|0 0 160m 465m 55m 124 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:48 *0 *0 *0 *0 0 1|0 0 160m 465m 55m 123 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:49 *0 *0 *0 *0 0 1|0 0 160m 465m 56m 122 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:50 *0 *0 *0 *0 0 1|0 0 160m 465m 56m 123 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:51 insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time *0 *0 *0 *0 0 1|0 0 160m 465m 57m 123 .:2.6% 0 0|0 0|0 62b 2k 2 09:55:52 *0 *0 *0 *0 0 1|0 0 160m 465m 57m 122 .:1.5% 0 0|0 0|0 62b 2k 2 09:55:53 *0 *0 *0 *0 0 1|0 0 160m 465m 58m 122 .:1.6% 0 0|0 0|0 62b 2k 2 09:55:54 *0 *0 *0 *0 0 1|0 0 160m 461m 56m 36 test:0.0% 0 0|0 0|0 104b 1m 2 09:55:55 *0 *0 *0 *0 0 1|0 0 160m 461m 56m 0 .:0.0% 0 0|0 0|0 62b 2k 2 09:55:56 *0 *0 *0 *0 0 1|0 0 160m 461m 56m 0 test:0.0% 0 0|0 0|0 62b 2k 2 09:55:57