$ mongo MongoDB shell version: 3.0.0 connecting to: test Server has startup warnings: 2015-03-06T23:40:40.565+0900 I CONTROL [initandlisten] 2015-03-06T23:40:40.565+0900 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'. 2015-03-06T23:40:40.565+0900 I CONTROL [initandlisten] ** We suggest setting it to 'never' 2015-03-06T23:40:40.565+0900 I CONTROL [init