When i try compile my map i get this:

Calculating light grid...
18.3% complete, 2 seconds done, 9 seconds remaining              
21.4% complete, 3 seconds done, 10 seconds remaining              
22.4% complete, 3 seconds done, 12 seconds remaining              
23.4% complete, 4 seconds done, 13 seconds remaining              
24.1% complete, 5 seconds done, 14 seconds remaining              
25.1% complete, 5 seconds done, 15 seconds remaining              
26.6% complete, 6 seconds done, 16 seconds remaining              
27.7% complete, 7 seconds done, 19 seconds remaining              
28.7% complete, 8 seconds done, 20 seconds remaining              
29.0% complete, 9 seconds done, 22 seconds remaining              
30.8% complete, 10 seconds done, 23 seconds remaining              

Small hunk ran out of memory attempting to alloc 8 bytes

Ive tried resizing my light grid volume to make it smaller and removing some lights i dont really need, but still does same thing.