Both mongorestore and mongod are version 3.0.2 and the restore was run against a standalone. Here's some data collected during this period: mongorestore - Ran: mongorestore dump/ 2015-04-22T15:36:14.077-0400 building a list of dbs and collections to restore from /Users/bedrich/Downloads/dump/ dir 2015-04-22T15:36:14.084-0400 reading metadata file from /Users/bedrich/Downloads/dump/support/issues.metadata.json 2015-04-22T15:36:14.087-0400 restoring support.issues from file /Users/bedrich/Downloads/dump/support/issues.bson 2015-04-22T15:36:17.080-0400 [#.......................] support.issues 190.0 MB/2.8 GB (6.5%) 2015-04-22T15:36:20.082-0400 [###.....................] support.issues 439.3 MB/2.8 GB (15.1%) 2015-04-22T15:36:23.083-0400 [#####...................] support.issues 637.2 MB/2.8 GB (21.9%) 2015-04-22T15:36:26.081-0400 [#######.................] support.issues 861.1 MB/2.8 GB (29.7%) 2015-04-22T15:36:29.079-0400 [########................] support.issues 1.0 GB/2.8 GB (36.3%) 2015-04-22T15:36:32.080-0400 [########................] support.issues 1.0 GB/2.8 GB (36.3%) 2015-04-22T15:36:35.082-0400 [########................] support.issues 1.1 GB/2.8 GB (37.4%) 2015-04-22T15:36:38.081-0400 [##########..............] support.issues 1.2 GB/2.8 GB (44.0%) 2015-04-22T15:36:41.080-0400 [###########.............] support.issues 1.4 GB/2.8 GB (48.4%) 2015-04-22T15:36:44.083-0400 [###########.............] support.issues 1.4 GB/2.8 GB (48.4%) 2015-04-22T15:36:47.080-0400 [############............] support.issues 1.5 GB/2.8 GB (53.9%) 2015-04-22T15:36:50.084-0400 [##############..........] support.issues 1.7 GB/2.8 GB (61.6%) 2015-04-22T15:36:53.081-0400 [################........] support.issues 1.9 GB/2.8 GB (67.1%) 2015-04-22T15:36:56.079-0400 [################........] support.issues 1.9 GB/2.8 GB (67.1%) 2015-04-22T15:36:59.083-0400 [#################.......] support.issues 2.0 GB/2.8 GB (71.5%) 2015-04-22T15:37:02.083-0400 [#################.......] support.issues 2.0 GB/2.8 GB (71.5%) 2015-04-22T15:37:05.081-0400 [##################......] support.issues 2.2 GB/2.8 GB (75.9%) 2015-04-22T15:37:08.080-0400 [###################.....] support.issues 2.3 GB/2.8 GB (82.5%) 2015-04-22T15:37:11.082-0400 [#####################...] support.issues 2.5 GB/2.8 GB (89.1%) 2015-04-22T15:37:14.080-0400 [#######################.] support.issues 2.7 GB/2.8 GB (96.2%) mongostat - Ran: mongostat 1574 *0 *0 *0 0 3|0 0 8.5G 19.8G 4.1G 0 0 0|1 0|1 34m 11k 6 15:36:45 5702 *0 *0 *0 0 4|0 0 8.5G 19.8G 4.2G 0 0 0|0 0|1 101m 11k 6 15:36:46 3438 *0 *0 *0 0 4|0 0 8.5G 19.8G 3.6G 0 0 0|0 0|0 67m 11k 6 15:36:47 3780 *0 *0 *0 0 3|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|1 67m 10k 6 15:36:48 5989 *0 *0 *0 0 6|0 0 8.5G 19.8G 3.8G 0 0 0|1 0|1 101m 11k 6 15:36:49 insert query update delete getmore command flushes mapped vsize res faults idx miss % qr|qw ar|aw netIn netOut conn time 4683 *0 *0 *0 0 3|0 0 8.5G 19.8G 3.6G 0 0 0|0 0|0 67m 10k 6 15:36:50 6036 *0 *0 *0 0 4|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 101m 11k 6 15:36:51 1855 *0 *0 *0 0 3|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 34m 10k 6 15:36:52 *0 *0 *0 *0 0 1|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 79b 10k 6 15:36:53 *0 *0 *0 *0 0 2|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 133b 10k 6 15:36:54 *0 *0 *0 *0 0 1|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 79b 10k 6 15:36:55 *0 *0 *0 *0 0 1|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 79b 10k 6 15:36:56 1692 *0 *0 *0 0 3|0 0 8.5G 19.8G 3.6G 0 0 0|0 0|0 33m 10k 6 15:36:57 4976 *0 *0 *0 0 4|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 101m 11k 6 15:36:58 *0 *0 *0 *0 0 2|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 133b 10k 6 15:36:59 insert query update delete getmore command flushes mapped vsize res faults idx miss % qr|qw ar|aw netIn netOut conn time *0 *0 *0 *0 0 1|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 79b 10k 6 15:37:00 *0 *0 *0 *0 0 1|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 79b 10k 6 15:37:01 *0 *0 *0 *0 0 2|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 133b 10k 6 15:37:02 *0 *0 *0 *0 0 2|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 136b 23k 6 15:37:03 4990 *0 *0 *0 0 5|0 0 8.5G 19.8G 3.8G 0 0 0|0 0|0 101m 23k 6 15:37:04 1691 *0 *0 *0 0 4|0 0 8.5G 19.8G 3.7G 0 0 0|1 0|1 33m 23k 6 15:37:05 3341 *0 *0 *0 0 4|0 0 8.5G 19.8G 3.6G 0 0 0|1 0|1 67m 23k 6 15:37:06 3298 *0 *0 *0 0 5|0 0 8.5G 19.8G 3.7G 0 0 0|1 0|1 67m 23k 6 15:37:07 3172 *0 *0 *0 0 4|0 0 8.5G 19.8G 3.5G 0 0 0|1 0|1 67m 23k 6 15:37:08 3022 *0 *0 *0 0 5|0 0 8.5G 19.8G 3.6G 0 0 0|1 0|1 67m 23k 6 15:37:09 insert query update delete getmore command flushes mapped vsize res faults idx miss % qr|qw ar|aw netIn netOut conn time 5145 *0 *0 *0 0 5|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|0 101m 23k 6 15:37:10 2655 *0 *0 *0 0 4|0 0 8.5G 19.8G 3.6G 0 0 0|0 0|0 67m 23k 6 15:37:11 3253 *0 *0 *0 0 5|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|1 67m 23k 6 15:37:12 2962 *0 *0 *0 0 4|0 0 8.5G 19.8G 3.7G 0 0 0|1 0|1 67m 23k 6 15:37:13 4958 *0 *0 *0 0 6|0 0 8.5G 19.8G 3.6G 0 0 0|0 0|0 101m 23k 6 15:37:14 3284 *0 *0 *0 0 5|0 0 8.5G 19.8G 3.7G 0 0 0|0 0|1 67m 23k 6 15:37:15 1914 *0 *0 *0 0 4|0 0 8.5G 19.8G 3.9G 1 0 1|0 1|1 30m 23k 6 15:37:16 top - Ran while(true){printjson(db.runCommand("top")["totals"]["support.issues"]["insert"]);printjson(new Date());sleep(1000)} Wisdoms-MacBook-Pro(mongod-3.0.2) admin> while ( true ){printjson(db.runCommand( "top" )[ "totals" ][ "support.issues" ][ "insert" ]);printjson( new Date());sleep(1000)} { "count" : 65, "time" : 13880654 } ISODate( "2015-04-22T19:37:03.192Z" ) { "count" : 67, "time" : 14114514 } ISODate( "2015-04-22T19:37:04.198Z" ) { "count" : 69, "time" : 14350828 } ISODate( "2015-04-22T19:37:05.205Z" ) { "count" : 71, "time" : 14569963 } ISODate( "2015-04-22T19:37:06.211Z" ) { "count" : 73, "time" : 15274439 } ISODate( "2015-04-22T19:37:07.215Z" ) { "count" : 75, "time" : 15605750 } ISODate( "2015-04-22T19:37:08.218Z" ) { "count" : 77, "time" : 15843429 } ISODate( "2015-04-22T19:37:09.222Z" ) { "count" : 79, "time" : 16439871 } ISODate( "2015-04-22T19:37:10.228Z" ) { "count" : 81, "time" : 16820034 } ISODate( "2015-04-22T19:37:11.230Z" ) { "count" : 83, "time" : 17090708 } ISODate( "2015-04-22T19:37:12.235Z" ) { "count" : 86, "time" : 17589414 } ISODate( "2015-04-22T19:37:13.237Z" ) { "count" : 88, "time" : 17866561 } ISODate( "2015-04-22T19:37:14.242Z" ) { "count" : 91, "time" : 18252756 } ISODate( "2015-04-22T19:37:15.244Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:16.246Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:17.251Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:18.254Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:19.259Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:20.261Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:21.262Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:22.266Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:23.269Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:24.273Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:25.278Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:26.280Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:27.281Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:28.284Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:29.285Z" ) { "count" : 92, "time" : 18443123 } ISODate( "2015-04-22T19:37:30.286Z" ) { "count" : 92, "time" : 18443123 }