$ bin/fluent-bit -i mem -o stdout

[2015/06/02 18:41:02] [ info] starting engine
[0] {"time"=>1433292063, "total"=>8081592, "free"=>1595860}
[1] {"time"=>1433292064, "total"=>8081592, "free"=>1596028}
[2] {"time"=>1433292065, "total"=>8081592, "free"=>1595900}
[3] {"time"=>1433292066, "total"=>8081592, "free"=>1600272}
[4] 0
[5] 0
[6] 0
[7] 0
[8] 0
[9] 0
[10] 0
[11] 0
[12] 33
[13] 1
[14] 0
[15] 0
[16] 0
[17] 0
[18] 0
[19] 0
[20] 104
[21] -19
[22] 86
[23] "d^?^@^@hVd^?^@^@^@"
[24] 0
[25] 0
[26] 0
[27] 0
[28] 0