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-rw-r--r--doc/src/sgml/ref/pgupgrade.sgml13
1 files changed, 13 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/pgupgrade.sgml b/doc/src/sgml/ref/pgupgrade.sgml
index 68ec68f47b6..58c6c2df8b8 100644
--- a/doc/src/sgml/ref/pgupgrade.sgml
+++ b/doc/src/sgml/ref/pgupgrade.sgml
@@ -264,6 +264,19 @@ PostgreSQL documentation
</varlistentry>
<varlistentry>
+ <term><option>--copy-file-range</option></term>
+ <listitem>
+ <para>
+ Use the <function>copy_file_range</function> system call for efficient
+ copying. On some file systems this gives results similar to
+ <option>--clone</option>, sharing physical disk blocks, while on others
+ it may still copy blocks, but do so via an optimized path. At present,
+ it is supported on Linux and FreeBSD.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
<term><option>-?</option></term>
<term><option>--help</option></term>
<listitem><para>show help, then exit</para></listitem>