Not sure about logstash but a lot of its users use NXLog (http://nxlog.org http://nxlog.org) as a shipper since it has a much lower resource footprint as there

Not sure about logstash but a lot of its users use NXLog (http://nxlog.org http://nxlog.org) as a shipper since it has a much lower resource footprint as there is no java and ruby in there. (I'm affiliated with NXLog.)