[Tile-serving] Tiles aren't rendering

[Stephen D]

Hi,

My tile server is not rendering tiles. I had it working with 
Canada(imported w/o a flat file), but after dropping the database and 
re-importing the whole planet(with a flat file) it no longer works.

The command I used to import was: osm2pgsql -d gis --create --slim  -G 
--hstore --tag-transform-script 
~/src/openstreetmap-carto/openstreetmap-carto.lua --flat-nodes 
~/data/flatnodes.bin  -C 6000 --drop --number-processes 8 -S 
~/src/openstreetmap-carto/openstreetmap-carto.style 
/home/stephen/planet-latest.osm.pbf

When requesting a tile, this shows up in the log file:

Apr 23 18:37:15 osm-tilemap renderd[1488]: DEBUG: Connection 0, fd 7 
closed, now 0 left
Apr 23 18:39:21 osm-tilemap renderd[1488]: DEBUG: Got incoming 
connection, fd 7, number 1
Apr 23 18:39:21 osm-tilemap renderd[1488]: DEBUG: Got incoming request 
with protocol version 2
Apr 23 18:39:21 osm-tilemap renderd[1488]: DEBUG: Got command RenderPrio 
fd(7) xml(ajt), z(1), x(1), y(1), mime(image/png), options()
Apr 23 18:39:51 osm-tilemap renderd[1488]: DEBUG: Connection 0, fd 7 
closed, now 0 left

After 30 seconds it times out. No tiles appear in the cache directory, 
even after several minutes. The CPU reaches 20% per core for all cores, 
and disk usage is around 200MB/s read. Both the CPU and disk are used by 
the postgresql process.

I am using apache2, mod_tile, mapnik, and renderd.

Thanks,

Stephen