No result after nominatim installation

Hello, I'm trying to setup a nominatim server like https://nominatim.openstreetmap.org/ but something is going wrong.

SCOPE: Have a nominatim server with all the planet indexed, a copy of nominatim.openstreetmap.org

SOFTWARE:

RHEL 7 64bit
PostgreSQL 9.6
Postigis 2.4
PHP 5.4.16
gcc-c++-4.8.5-16
libgcc-4.8.5-16
cpp-4.8.5-16
gcc-4.8.5-16
libgcc-4.8.5-16

HARDWARE:

32CPUs
64GB RAM
590GB storage

Trying to install the version 3.0.1 of Nominatim I'm having some difficulties to index all the planet. I've followed the steps in the documentation http://nominatim.org/release-docs/3.0.1/Install-on-Centos-7.html and the compiler doesn't report any error.

List of main attempt:

• First Attempt: I've imported the Central america region by using the setup command ./utils/setup.php --osm-file /data/nominatim/Nominatim-3.0.1/data/central-america-latest.osm.bz2 --all --osm2pgsql-cache 38000 2>&1 | tee setup.log The import was a success! Searching for central america region the result appear as expected. So I decided to import the Australia using the update command ./utils/update.php --import-file /data/nominatim/Nominatim-3.0.1/data/australia-oceania-latest.osm.bz2 --osm2pgsql-cache 38000 &> australia.log Unfortunately after the import, searching for "Perth" or other Australian city, the result was empty. I've also tried the command /utils/update.php --index --index-instances 30 but the result was the same
• Second Attempt: Removing the database I've imported the Antartica. After the import it works as expected, so I decided to import the Australia (again) but nothing. I've tried different times with different options but it was always a failure.
• Third Attempt: After many imports I decided to import directly all the planet (http://ftp5.gwdg.de/pub/misc/openstreetmap/planet.openstreetmap.org/pbf/planet-latest.osm.pbf) with the setup script like the first attempt. The import miserably fails :(

I'm struggling to have a nominatim server up and running but I've no clue how to solve this issue.

I'm doing the importing in some step wrong? I've to do other command or step after the import?

Thanks in advance.