X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/5c8fbe8186ea0fa06b7c96f08e8afba1744492c1..2c163b3959e79fccb8f773ed5a4b92798753c45a:/docs/admin/Installation.md

diff --git a/docs/admin/Installation.md b/docs/admin/Installation.md
index 67c4fe3c..89afd2bc 100644
--- a/docs/admin/Installation.md
+++ b/docs/admin/Installation.md
@@ -1,7 +1,10 @@
+# Basic Installation
+
 This page contains generic installation instructions for Nominatim and its
 prerequisites. There are also step-by-step instructions available for
 the following operating systems:
 
+  * [Ubuntu 18.04](../appendix/Install-on-Ubuntu-18.md)
   * [Ubuntu 16.04](../appendix/Install-on-Ubuntu-16.md)
   * [CentOS 7.2](../appendix/Install-on-Centos-7.md)
 
@@ -15,9 +18,9 @@ and can't offer support.
   * [Docker on Kubernetes](https://github.com/peter-evans/nominatim-k8s)
   * [Ansible](https://github.com/synthesio/infra-ansible-nominatim)
 
-# Prerequisites
+## Prerequisites
 
-## Software
+### Software
 
 For compiling:
 
@@ -26,61 +29,65 @@ For compiling:
   * a recent C++ compiler
 
 Nominatim comes with its own version of osm2pgsql. See the
-osm2pgsql README for additional dependencies required for compiling osm2pgsql.
+[osm2pgsql README](https://github.com/openstreetmap/osm2pgsql/blob/master/README.md#building)
+for additional dependencies required for compiling osm2pgsql.
 
 For running tests:
 
   * [behave](http://pythonhosted.org/behave/)
-  * [Psycopg2](http://initd.org/psycopg)
+  * [Psycopg2](https://initd.org/psycopg)
   * [nose](https://nose.readthedocs.io)
   * [phpunit](https://phpunit.de)
 
 For running Nominatim:
 
-  * [PostgreSQL](http://www.postgresql.org) (9.1 or later)
-  * [PostGIS](http://postgis.refractions.net) (2.0 or later)
-  * [PHP](http://php.net) (5.4 or later)
+  * [PostgreSQL](https://www.postgresql.org) (9.3 or later)
+  * [PostGIS](https://postgis.org) (2.2 or later)
+  * [PHP](https://php.net) (7.0 or later)
   * PHP-pgsql
   * PHP-intl (bundled with PHP)
-  * [PEAR::DB](http://pear.php.net/package/DB)
   * a webserver (apache or nginx are recommended)
 
 For running continuous updates:
 
-  * [pyosmium](http://osmcode.org/pyosmium/)
+  * [pyosmium](https://osmcode.org/pyosmium/) (with Python 3)
 
-## Hardware
+### Hardware
 
 A minimum of 2GB of RAM is required or installation will fail. For a full
-planet import 32GB of RAM or more strongly are recommended.
+planet import 64GB of RAM or more are strongly recommended. Do not report
+out of memory problems if you have less than 64GB RAM.
 
-For a full planet install you will need about 600GB of hard disk space (as of
-January 2017, take into account that the OSM database is growing fast). SSD disks
+For a full planet install you will need at least 800GB of hard disk space
+(take into account that the OSM database is growing fast). SSD disks
 will help considerably to speed up import and queries.
 
-On a 6-core machine with 32GB RAM and SSDs the import of a full planet takes
-a bit more than 2 days. Without SSDs 7-8 days are more realistic.
-
+Even on a well configured machine the import of a full planet takes
+at least 2 days. Without SSDs 7-8 days are more realistic.
 
-# Setup of the server
+## Setup of the server
 
-## PostgreSQL tuning
+### PostgreSQL tuning
 
 You might want to tune your PostgreSQL installation so that the later steps
 make best use of your hardware. You should tune the following parameters in
 your `postgresql.conf` file.
 
-    shared_buffers (2GB)
-    maintenance_work_mem (10GB)
-    work_mem (50MB)
-    effective_cache_size (24GB)
+    shared_buffers = 2GB
+    maintenance_work_mem = (10GB)
+    autovacuum_work_mem = 2GB
+    work_mem = (50MB)
+    effective_cache_size = (24GB)
     synchronous_commit = off
     checkpoint_segments = 100 # only for postgresql <= 9.4
+    max_wal_size = 1GB # postgresql > 9.4
     checkpoint_timeout = 10min
     checkpoint_completion_target = 0.9
 
 The numbers in brackets behind some parameters seem to work fine for
-32GB RAM machine. Adjust to your setup.
+64GB RAM machine. Adjust to your setup. A higher number for `max_wal_size`
+means that PostgreSQL needs to run checkpoints less often but it does require
+the additional space on your disk.
 
 For the initial import, you should also set:
 
@@ -91,13 +98,13 @@ Don't forget to reenable them after the initial import or you risk database
 corruption. Autovacuum must not be switched off because it ensures that the
 tables are frequently analysed.
 
-## Webserver setup
+### Webserver setup
 
 The `website/` directory in the build directory contains the configured
 website. Include the directory into your webbrowser to serve php files
 from there.
 
-### Configure for use with Apache
+#### Configure for use with Apache
 
 Make sure your Apache configuration contains the required permissions for the
 directory and create an alias:
@@ -116,7 +123,7 @@ build directory.
 After making changes in the apache config you need to restart apache.
 The website should now be available on http://localhost/nominatim.
 
-### Configure for use with Nginx
+#### Configure for use with Nginx
 
 Use php-fpm as a deamon for serving PHP cgi. Install php-fpm together with nginx.