Render Rocket recommends that render jobs be launched with 8 processors per frame.  If you are an advanced user and would like to use a lower setting, please keep in mind that 4 processors per frame will limit the RAM to 4GB, and 2 processors per frames will limit the RAM to 2GB. 

For fast rendering frames, instead of using a lower processors per frame setting, using the batch option is a better way save render times.  If for example you are rendering a 1000 frame animation, a batch setting of 20 will allow you to render 50 batches of 20 frames simultaneously.  Batching helps save render time by cutting the software and scene loading times to once per batch instead once for every frame. 

If your scene requires more than 8GB of RAM, please contact support@renderRocket.com for a custom project configuration.