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Diffstat (limited to 'doc/src/sgml/ref/postgres-ref.sgml')
| -rw-r--r-- | doc/src/sgml/ref/postgres-ref.sgml | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/doc/src/sgml/ref/postgres-ref.sgml b/doc/src/sgml/ref/postgres-ref.sgml index 4aaa7abe1a2..f72c3b04e42 100644 --- a/doc/src/sgml/ref/postgres-ref.sgml +++ b/doc/src/sgml/ref/postgres-ref.sgml @@ -133,14 +133,21 @@ PostgreSQL documentation <listitem> <para> Prints the value of the named run-time parameter, and exits. - (See the <option>-c</option> option above for details.) This can - be used on a running server, and returns values from + (See the <option>-c</option> option above for details.) This + returns values from <filename>postgresql.conf</filename>, modified by any parameters supplied in this invocation. It does not reflect parameters supplied when the cluster was started. </para> <para> + This can be used on a running server for most parameters. However, + the server must be shut down for some runtime-computed parameters + (e.g., <xref linkend="guc-shared-memory-size"/> and + <xref linkend="guc-wal-segment-size"/>). + </para> + + <para> This option is meant for other programs that interact with a server instance, such as <xref linkend="app-pg-ctl"/>, to query configuration parameter values. User-facing applications should instead use <link |