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doc: Document the postgresql-config-file.

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* doc/guix.texi (PostgreSQL): Document the postgresql-config-file record.
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Christopher Baines 2020-10-25 08:49:45 +00:00
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@ -18697,6 +18697,54 @@ required to add extensions provided by other packages.
@end table
@end deftp
@deftp {Data Type} postgresql-config-file
Data type representing the PostgreSQL configuration file. As shown in
the following example, this can be used to customize the configuration
of PostgreSQL. Note that you can use any G-expression or filename in
place of this record, if you already have a configuration file you'd
like to use for example.
@lisp
(service postgresql-service-type
(postgresql-configuration
(config-file
(postgresql-config-file
(log-destination "stderr")
(hba-file
(plain-file "pg_hba.conf"
"
local all all trust
host all all 127.0.0.1/32 md5
host all all ::1/128 md5"))
(extra-config
'(("session_preload_libraries" "'auto_explain'")
("random_page_cost" "2")
("auto_explain.log_min_duration" "'100ms'")
("work_mem" "'500MB'")
("logging_collector" "on")
("log_directory" "'/var/log/postgresql'")))))))
@end lisp
@table @asis
@item @code{log-destination} (default: @code{"syslog"})
The logging method to use for PostgreSQL. Multiple values are accepted,
separated by commas.
@item @code{hba-file} (default: @code{%default-postgres-hba})
Filename or G-expression for the host-based authentication
configuration.
@item @code{ident-file} (default: @code{%default-postgres-ident})
Filename or G-expression for the user name mapping configuration.
@item @code{extra-config} (default: @code{'()})
List of additional keys and values to include in the PostgreSQL config
file. Each entry in the list should be a list where the first element
is the key, and the remaining elements are the values.
@end table
@end deftp
@subsubheading MariaDB/MySQL
@deffn {Scheme Procedure} mysql-service [#:config (mysql-configuration)]