--all --force \
--tile-dir=/srv/tile.openstreetmap.org/tiles \
--socket=/var/run/renderd/renderd.sock \
- --num-threads=<%= ( node[:cpu][:total] - 2 ) / 4 %> \
+ --num-threads=<%= ( node[:cpu][:total] - 2 ) / 2 %> \
--map="<%= style %>" \
--max-load=70 \
--min-zoom=0 --max-zoom=12