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docs: migration to new wikipedia needs new index

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Fixes #1998.
This commit is contained in:
Sarah Hoffmann
2020-10-11 10:40:23 +02:00
parent 4a6f7e3095
commit ff9ffa0351
1 changed files with 6 additions and 0 deletions
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6
docs/admin/Migration.md
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@@ -17,6 +17,12 @@ follows:
* download the new Wikipedia tables as described in the import section * download the new Wikipedia tables as described in the import section
* reimport the tables: `./utils/setup.php --import-wikipedia-articles` * reimport the tables: `./utils/setup.php --import-wikipedia-articles`
* update the functions: `./utils/setup.php --create-functions --enable-diff-updates` * update the functions: `./utils/setup.php --create-functions --enable-diff-updates`
* create a new lookup index:
```
CREATE INDEX idx_placex_wikidata on placex
USING BTREE ((extratags -> 'wikidata'))
WHERE extratags ? 'wikidata' and class = 'place' and osm_type = 'N' and rank_search < 26
```
* compute importance: `./utils/update.php --recompute-importance` * compute importance: `./utils/update.php --recompute-importance`
The last step takes about 10 hours on the full planet. The last step takes about 10 hours on the full planet.