Nominatim slow - stuck at Functions

Nominatim 2.4 install.

/usr/bin/php -Cq ./utils/setup.php --osm-file /vol/north-america-latest.osm.pbf --all --osm2pgsql-cache 7000

It runs: /home/nominatim/Nominatim-2.4.0/nominatim/nominatim -i -d nominatim -P 5432 -t 3 -r 5 -R 25

Slow - been running 12 + hours and the log is not changing. Load is 3 cores on a 4 core box. Last log entry is Functions.

Node stats: total(783686820), max(3646699746) in 2396s

Way stats: total(51666293), max(360069395) in 4044s

Relation stats: total(460477), max(5360296) in 456s

Setting up table: planet_osm_nodes

Setting up table: planet_osm_ways

Setting up table: planet_osm_rels

Going over pending ways... 0 ways are pending

Using 1 helper-processes ^MFinished processing 0 ways in 0 sec

Going over pending relations... 0 relations are pending

Using 1 helper-processes

^MFinished processing 0 relations in 0 sec

Stopping table: planet_osm_nodes

Stopping table: planet_osm_rels

Building index on table: planet_osm_rels

Stopping table: planet_osm_ways

Stopped table: planet_osm_nodes in 0s

Stopped table: planet_osm_ways in 0s

Stopped table: planet_osm_rels in 12s

node cache: stored: 645470369(82.36%), storage efficiency: 70.35% (dense blocks: 557656, sparse nodes: 173232129), hit rate: 84.20%

Osm2pgsql took 6910s overall

Functions

Postgres activity:

nominatim | 20565 | idle | select place_id from placex where rank_search = $1 and geometry_sector = $2 and indexed_status > 0

nominatim | 20374 | idle | insert into placex (osm_type, osm_id, class, type, name, admin_level, housenumber, street, addr_place, isin, postcode, country_code, extratags, geometry) select * from place where osm_id % 3 = 0

nominatim | 20375 | idle | insert into placex (osm_type, osm_id, class, type, name, admin_level, housenumber, street, addr_place, isin, postcode, country_code, extratags, geometry) select * from place where osm_id % 3 = 1

nominatim | 20376 | idle | INSERT INTO import_status VALUES('2015-07-11 18:13')

nominatim | 20566 | active | update placex set indexed_status = 0 where place_id = $1

nominatim | 20567 | active | update placex set indexed_status = 0 where place_id = $1

nominatim | 20568 | active | update placex set indexed_status = 0 where place_id = $1

postgres | 26833 | active | SELECT datname,pid,state,query FROM pg_stat_activity;

Why would there be 3 of these? And what is it trying to do?

update placex set indexed_status = 0 where place_id = $1