Dear Sir ,

The account authentication became slowly after MongoDB running a period of time (about 3 months) , the problem will be get rid after switch to second node . please help me investigate the problem , thanks

Here is log :
Fri Dec 14 01:28:00 [conn13613089] query devcmd.$cmd ntoreturn:1 command:

{ authenticate: 1, user: "mportal", nonce: "ab55d0ce2583c596", key: "d8dc96d497bbdfb52c9d132b842110a4" }

reslen:53 7111ms
Fri Dec 14 01:28:00 [conn13613090] query devcmd.$cmd ntoreturn:1 command:

{ authenticate: 1, user: "mportal", nonce: "33ed05275ef0e04b", key: "6d1a8349f759a4f5c9656b502f913e14" }

reslen:53 6396ms
Fri Dec 14 01:28:00 [conn13547075] query mstore.$cmd ntoreturn:1 command:

{ authenticate: 1, user: "tmpn", nonce: "abe4b16c18f1d400", key: "aa87004f495f76f4de862ac4287f9993" }

reslen:53 6386ms
Fri Dec 14 01:28:00 [conn13613091] query devcmd.$cmd ntoreturn:1 command:

{ authenticate: 1, user: "mportal", nonce: "41106940b1c2ebc1", key: "0eb6c6f29610ef0bb729c23f4034bf43" }

reslen:53 6203ms
Fri Dec 14 01:28:00 [conn13613092] query devcmd.$cmd ntoreturn:1 command:

{ authenticate: 1, user: "mportal", nonce: "c7acf1353aaa024", key: "9ec8baca40439ed2a16aa35c5e3fb8ff" }

reslen:53 6123ms
Fri Dec 14 01:28:00 [conn13544080] query mstore.$cmd ntoreturn:1 command:

{ authenticate: 1, user: "tmpn", nonce: "3a16d4a086559bfc", key: "8c7d2e6c6c5e7e0b23f3c9b0772c8c78" }

reslen:53 5186ms
Fri Dec 14 01:28:00 [conn13583888] query mstore.$cmd ntoreturn:1 command:

{ authenticate: 1, user: "tmpn", nonce: "f92a4be746b2749c", key: "c0c25347be7a272ea34d97d2dd4f112a" }

reslen:53 9035ms
Fri Dec 14 01:28:00 [conn13606051] query mstore.$cmd ntoreturn:1 command:

{ authenticate: 1, user: "tmpn", nonce: "4135f98c6f397df4", key: "85bf798b4986fb10b3424e5d50d6c581" }

reslen:53 7500ms
Fri Dec 14 01:28:00 [conn13613093] query devcmd.$cmd ntoreturn:1 command:

{ authenticate: 1, user: "mportal", nonce: "814c80c117a046e1", key: "6905af681aceb9d49c0cf6aab1d8a70b" }

reslen:53 5571ms