My render stop at "Render image (pass 0)"

My render stop at “Render image (pass 0)” for nearly half an hour, and the progress window shows (start progressive rendering, server mode0, perform rendering 1 Progressive sampling base buffer memory usage: 11121.92MB). Does it mean my pc dont have enough ram to process the render?

Render in 15000x8438 using Vray3.6
Intel i7-7700 3.6ghz
Geforce GTX 1070
RAM 16gb