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update import times

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Sarah Hoffmann
2020-12-08 08:57:46 +01:00
parent 34f8e6ddf7
commit 1b3acc4f8f
2 changed files with 9 additions and 9 deletions
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10
docs/admin/Import.md
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@@ -64,7 +64,7 @@ involve a GB or US postcode. This data can be optionally downloaded:
In its default setup Nominatim is configured to import the full OSM data In its default setup Nominatim is configured to import the full OSM data
set for the entire planet. Such a setup requires a powerful machine with set for the entire planet. Such a setup requires a powerful machine with
at least 64GB of RAM and around 800GB of SSD hard disks. Depending on your at least 64GB of RAM and around 900GB of SSD hard disks. Depending on your
use case there are various ways to reduce the amount of data imported. This use case there are various ways to reduce the amount of data imported. This
section discusses these methods. They can also be combined. section discusses these methods. They can also be combined.
@@ -137,10 +137,10 @@ OSM data grows with time.
style | Import time | DB size | after drop style | Import time | DB size | after drop
----------|--------------|------------|------------ ----------|--------------|------------|------------
admin | 4h | 215 GB | 20 GB admin | 4h | 215 GB | 20 GB
street | 42h | 400 GB | 180 GB street | 22h | 440 GB | 185 GB
address | 59h | 500 GB | 260 GB address | 36h | 545 GB | 260 GB
full | 80h | 575 GB | 300 GB full | 54h | 640 GB | 330 GB
extratags | 80h | 585 GB | 310 GB extratags | 54h | 650 GB | 340 GB
You can also customize the styles further. You can also customize the styles further.
A [description of the style format](../develop/Import.md#configuring-the-import) A [description of the style format](../develop/Import.md#configuring-the-import)

8
docs/admin/Installation.md
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@@ -57,12 +57,12 @@ A minimum of 2GB of RAM is required or installation will fail. For a full
planet import 64GB of RAM or more are strongly recommended. Do not report planet import 64GB of RAM or more are strongly recommended. Do not report
out of memory problems if you have less than 64GB RAM. out of memory problems if you have less than 64GB RAM.
For a full planet install you will need at least 800GB of hard disk space For a full planet install you will need at least 900GB of hard disk space.
(take into account that the OSM database is growing fast). SSD disks Rake into account that the OSM database is growing fast.
will help considerably to speed up import and queries. Fast disks are essential. Using NVME disks is recommended.
Even on a well configured machine the import of a full planet takes 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. around 2 days. On traditional spinning disks, 7-8 days are more realistic.
## Tuning the PostgreSQL database ## Tuning the PostgreSQL database