High memory & cpu consumption

I'm trying to upload about 370GB of data to S3 and it is eating my resources like a beast, just saying

```
PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
26388 ops       20   0 7025268 6.620g   4304 R 100.1 21.2  34:57.35 ruby
```
