Group By does not seem to work about influxdb HOT 2 CLOSED

Influx> select instantaneous_ops_per_sec from info group by serverId where time > now() - 10d limit 10;
┌───────────────┬─────────────────┬───────────────────────────┬──────────────────────────┐
│ time          │ sequence_number │ instantaneous_ops_per_sec │ serverId                 │
├───────────────┼─────────────────┼───────────────────────────┼──────────────────────────┤
│ 1383996650387 │ 1186            │ 1                         │ 514883646ff643576b000035 │
│ 1383996650378 │ 1185            │ 1                         │ 526d71e23202e35309000001 │
│ 1383996644384 │ 1184            │ 1                         │ 514883646ff643576b000035 │
│ 1383996644375 │ 1183            │ 1                         │ 526d71e23202e35309000001 │
│ 1383996638379 │ 1182            │ 1                         │ 514883646ff643576b000035 │
│ 1383996638368 │ 1181            │ 1                         │ 526d71e23202e35309000001 │
│ 1383996632380 │ 1180            │ 1                         │ 514883646ff643576b000035 │
│ 1383996632372 │ 1179            │ 1                         │ 526d71e23202e35309000001 │
│ 1383996626380 │ 1178            │ 1                         │ 514883646ff643576b000035 │
│ 1383996626372 │ 1177            │ 1                         │ 526d71e23202e35309000001 │
└───────────────┴─────────────────┴───────────────────────────┴──────────────────────────┘

Influx> select count(instantaneous_ops_per_sec) from info where time > now() - 10d group by serverId limit 10;
Influx> (returns nothing)

GET http://localhost:8086/db/redsmin/series?u=root&p=root&q=select%20count(instantaneous_ops_per_sec)%20from%20info%20where%20time%20%3E%20now()%20-%2010d%20group%20by%20serverId%20limit%2010%3B&time_precision=m&chunked=false
=> []