* [bzip2](http://www.bzip.org/)
* [zlib](https://www.zlib.net/)
* [ICU](http://site.icu-project.org/)
+ * [nlohmann/json](https://json.nlohmann.me/)
* [Boost libraries](https://www.boost.org/), including system and filesystem
* PostgreSQL client libraries
* a recent C++ compiler (gcc 5+ or Clang 3.8+)
* [Python Dotenv](https://github.com/theskumar/python-dotenv)
* [psutil](https://github.com/giampaolo/psutil)
* [Jinja2](https://palletsprojects.com/p/jinja/)
- * [SQLAlchemy](https://www.sqlalchemy.org/) (1.4+ with greenlet support)
- * [GeoAlchemy2](https://geoalchemy-2.readthedocs.io/) (0.10+)
+ * [SQLAlchemy](https://www.sqlalchemy.org/) (1.4.31+ with greenlet support)
* [asyncpg](https://magicstack.github.io/asyncpg) (0.8+)
* [PyICU](https://pypi.org/project/PyICU/)
* [PyYaml](https://pyyaml.org/) (5.1+)
* [datrie](https://github.com/pytries/datrie)
+
+When running the PHP frontend:
* [PHP](https://php.net) (7.3+)
* PHP-pgsql
* PHP-intl (bundled with PHP)
- * PHP-cgi (for running queries from the command line)
For running continuous updates:
Fast disks are essential. Using NVME disks is recommended.
Even on a well configured machine the import of a full planet takes
-around 2 days. On traditional spinning disks, 7-8 days are more realistic.
+around 2 days. When using traditional SSDs, 4-5 days are more realistic.
## Tuning the PostgreSQL database
and even reduce `autovacuum_work_mem` further. This will reduce the amount
of memory that autovacuum takes away from the import process.
-For the initial import, you should also set:
-
- fsync = off
- full_page_writes = off
-
-Don't forget to re-enable them after the initial import or you risk database
-corruption.
-
-
## Downloading and building Nominatim
### Downloading the latest release