www-data@badger:/mnt/pbf$ bunzip2 -c planet-latest.osm.bz2 | osm2pgsql --slim -C 8192 /dev/stdin
osm2pgsql SVN version 0.80.0 (32bit id space)

Using projection SRS 900913 (Spherical Mercator)
Setting up table: planet_osm_point
NOTICE:  table "planet_osm_point_tmp" does not exist, skipping
Setting up table: planet_osm_line
NOTICE:  table "planet_osm_line_tmp" does not exist, skipping
Setting up table: planet_osm_polygon
NOTICE:  table "planet_osm_polygon_tmp" does not exist, skipping
Setting up table: planet_osm_roads
NOTICE:  table "planet_osm_roads_tmp" does not exist, skipping
Allocating memory for dense node cache
Allocating dense node cache in one big chunk
Out of memory for dense node cache, reduce --cache size
Error occurred, cleaning up