Some services seems to share the same name (almost) and having used loads of versions during the days I finally wonder if some of them are just leftovers? Look at Job Engine and Scheduler. The server running this that does not even have SQL used around 750 MB of memory. A bit much? Some of these services are under Orion folder and some under Common Files
SolarWinds Alerting Engine
SolarWinds Job Engine
SolarWinds Job Scheduler
SolarWinds NetFlow Service
SolarWinds Network Performance Monitor
SolarWinds Orion Information Service
SolarWinds Orion Job Engine
SolarWinds Orion Job Scheduler
SolarWinds Orion Module Engine
SolarWinds Syslog Service
SolarWinds Trap Service