| **After Changes:** | cannot be changed after import |
Defines the name of the database user that will run search queries. Usually
-this is the user under which the webserver is executed. When running Nominatim
-via php-fpm, you can also define a separate query user. The Postgres user
+this is the user under which the webserver is executed. The Postgres user
needs to be set up before starting the import.
Nominatim grants minimal rights to this user to all tables that are needed
for running geocoding queries.
-#### NOMINATIM_DATABASE_MODULE_PATH
-
-| Summary | |
-| -------------- | --------------------------------------------------- |
-| **Description:** | Directory where to find the PostgreSQL server module |
-| **Format:** | path |
-| **Default:** | _empty_ (use `<project_directory>/module`) |
-| **After Changes:** | run `nominatim refresh --functions` |
-| **Comment:** | Legacy tokenizer only |
-
-Defines the directory in which the PostgreSQL server module `nominatim.so`
-is stored. The directory and module must be accessible by the PostgreSQL
-server.
-
-For information on how to use this setting when working with external databases,
-see [Advanced Installations](../admin/Advanced-Installations.md).
-
-The option is only used by the Legacy tokenizer and ignored otherwise.
-
-
#### NOMINATIM_TOKENIZER
| Summary | |
| -------------- | --------------------------------------------------- |
| **Description:** | Tokenizer used for normalizing and parsing queries and names |
| **Format:** | string |
-| **Default:** | legacy |
+| **Default:** | icu |
| **After Changes:** | cannot be changed after import |
Sets the tokenizer type to use for the import. For more information on
If a relative path is given, then the file is searched first relative to the
project directory and then in the global settings directory.
-#### NOMINATIM_MAX_WORD_FREQUENCY
-
-| Summary | |
-| -------------- | --------------------------------------------------- |
-| **Description:** | Number of occurrences before a word is considered frequent |
-| **Format:** | int |
-| **Default:** | 50000 |
-| **After Changes:** | cannot be changed after import |
-| **Comment:** | Legacy tokenizer only |
-
-The word frequency count is used by the Legacy tokenizer to automatically
-identify _stop words_. Any partial term that occurs more often then what
-is defined in this setting, is effectively ignored during search.
-
#### NOMINATIM_LIMIT_REINDEXING
objects when the area becomes too large.
-#### NOMINATIM_UPDATE_FORWARD_DEPENDENCIES
-
-| Summary | |
-| -------------- | --------------------------------------------------- |
-| **Description:** | Forward geometry changes to dependet objects |
-| **Format:** | bool |
-| **Default:** | no |
-| **Comment:** | EXPERT ONLY. Must not be enabled after import. |
-
-The geometry of OSM ways and relations may change when a node that is part
-of the object is moved around. These changes are not propagated per default.
-The geometry of ways/relations is only updated the next time that the object
-itself is touched. When enabling this option, then dependent objects will
-be marked for update when one of its member objects changes.
-
-Enabling this option may slow down updates significantly.
-
-!!! warning
- If you want to enable this option, it must be set already on import.
- Do not enable this option on an existing database that was imported with
- NOMINATIM_UPDATE_FORWARD_DEPENDENCIES=no.
- Updates will become unusably slow.
-
#### NOMINATIM_LANGUAGES
| Summary | |
Currently only affects the initial import of country names and special phrases.
-#### NOMINATIM_TERM_NORMALIZATION
-
-| Summary | |
-| -------------- | --------------------------------------------------- |
-| **Description:** | Rules for normalizing terms for comparisons |
-| **Format:** | string: semicolon-separated list of ICU rules |
-| **Default:** | :: NFD (); [[:Nonspacing Mark:] [:Cf:]] >; :: lower (); [[:Punctuation:][:Space:]]+ > ' '; :: NFC (); |
-| **Comment:** | Legacy tokenizer only |
-
-[Special phrases](Special-Phrases.md) have stricter matching requirements than
-normal search terms. They must appear exactly in the query after this term
-normalization has been applied.
-
-Only has an effect on the Legacy tokenizer. For the ICU tokenizer the rules
-defined in the
-[normalization section](Tokenizers.md#normalization-and-transliteration)
-will be used.
-
-
#### NOMINATIM_USE_US_TIGER_DATA
| Summary | |
used.
-#### NOMINATIM_SEARCH_BATCH_MODE
-
-| Summary | |
-| -------------- | --------------------------------------------------- |
-| **Description:** | Enable a special batch query mode |
-| **Format:** | boolean |
-| **Default:** | no |
-| **After Changes:** | run `nominatim refresh --website` |
-
-This feature is currently undocumented and potentially broken.
-
-
-#### NOMINATIM_SEARCH_NAME_ONLY_THRESHOLD
-
-| Summary | |
-| -------------- | --------------------------------------------------- |
-| **Description:** | Threshold for switching the search index lookup strategy |
-| **Format:** | integer |
-| **Default:** | 500 |
-| **After Changes:** | run `nominatim refresh --website` |
-
-This setting defines the threshold over which a name is no longer considered
-as rare. When searching for places with rare names, only the name is used
-for place lookups. Otherwise the name and any address information is used.
-
-This setting only has an effect after `nominatim refresh --word-counts` has
-been called to compute the word frequencies.
-
-
#### NOMINATIM_LOOKUP_MAX_COUNT
| Summary | |
Return "Unable to geocode" instead.
+#### NOMINATIM_SERVE_LEGACY_URLS
+
+| Summary | |
+| -------------- | --------------------------------------------------- |
+| **Description:** | Enable serving via URLs with a .php suffix |
+| **Format:** | boolean |
+| **Default:** | yes |
+| **Comment:** | Python frontend only |
+
+When enabled, then endpoints are reachable as `/<name>` as well as `/<name>.php`.
+This can be useful when you want to be backwards-compatible with previous
+versions of Nominatim.
+
+
+#### NOMINATIM_API_POOL_SIZE
+
+| Summary | |
+| -------------- | --------------------------------------------------- |
+| **Description:** | Number of parallel database connections per worker |
+| **Format:** | number |
+| **Default:** | 10 |
+| **Comment:** | Python frontend only |
+
+Sets the maximum number of database connections available for a single instance
+of Nominatim. When configuring the maximum number of connections that your
+PostgreSQL database can handle, you need at least
+`NOMINATIM_API_POOL_SIZE` * `<number of configured workers>` connections.
+For configuring the number of workers, refer to the section about
+[Deploying the Python frontend](../admin/Deployment-Python.md).
+
+#### NOMINATIM_QUERY_TIMEOUT
+
+| Summary | |
+| -------------- | --------------------------------------------------- |
+| **Description:** | Timeout for SQL queries to the database |
+| **Format:** | number (seconds) |
+| **Default:** | 10 |
+| **Comment:** | Python frontend only |
+
+When this timeout is set, then all SQL queries that run longer than the
+specified numbers of seconds will be cancelled and the user receives a
+timeout exceptions. Users of the API see a 503 HTTP error.
+
+The timeout does ont apply when using the
+[low-level DB access](../library/Low-Level-DB-Access.md)
+of the library. A timeout can be manually set, if required.
+
+
+#### NOMINATIM_REQUEST_TIMEOUT
+
+| Summary | |
+| -------------- | --------------------------------------------------- |
+| **Description:** | Timeout for search queries |
+| **Format:** | number (seconds) |
+| **Default:** | 60 |
+| **Comment:** | Python frontend only |
+
+When this timeout is set, a search query will finish sending queries
+to the database after the timeout has passed and immediately return the
+results gathered so far.
+
+Note that under high load you may observe that users receive different results
+than usual without seeing an error. This may cause some confusion.
+
### Logging Settings
#### NOMINATIM_LOG_DB
<request time> <execution time in s> <number of results> <type> "<query string>"
Request time is the time when the request was started. The execution time is
-given in seconds and corresponds to the time the query took executing in PHP.
+given in seconds and includes the entire time the query was queued and executed
+in the frontend.
type contains the name of the endpoint used.
Can be used as the same time as NOMINATIM_LOG_DB.
+
+#### NOMINATIM_DEBUG_SQL
+
+| Summary | |
+| -------------- | --------------------------------------------------- |
+| **Description:** | Enable printing of raw SQL by SQLAlchemy |
+| **Format:** | boolean |
+| **Default:** | no |
+| **Comment:** | **For developers only.** |
+
+This settings enables
+[SQL debugging](https://docs.sqlalchemy.org/en/20/core/engines.html#dbengine-logging)
+by SQLAlchemy. This can be helpful when debugging some bugs with internal
+query handling. It should only be used together with the CLI query functions.
+Enabling it for server mode may have unintended consequences. Use the `debug`
+parameter instead, which prints information on how the search is executed
+including SQL statements.
projects / nominatim.git / blobdiff