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-rw-r--r--doc/src/sgml/protocol.sgml6
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index f63c912e971..75caa7fdb67 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -2757,8 +2757,10 @@ psql "dbname=postgres replication=database" -c "IDENTIFY_SYSTEM;"
<literal>-1</literal>), for <literal>lz4</literal> an integer
between 1 and 12 (default <literal>0</literal> for fast compression
mode), and for <literal>zstd</literal> an integer between
- <literal>1</literal> and <literal>22</literal> (default
- <literal>ZSTD_CLEVEL_DEFAULT</literal> or <literal>3</literal>).
+ <literal>ZSTD_minCLevel()</literal> (usually <literal>-131072</literal>)
+ and <literal>ZSTD_maxCLevel()</literal> (usually <literal>22</literal>),
+ (default <literal>ZSTD_CLEVEL_DEFAULT</literal> or
+ <literal>3</literal>).
</para>
<para>