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-rw-r--r--doc/src/sgml/protocol.sgml10
1 files changed, 7 insertions, 3 deletions
diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index 87870c5b102..dc08c9667d9 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -2752,9 +2752,13 @@ psql "dbname=postgres replication=database" -c "IDENTIFY_SYSTEM;"
<para>
The <literal>level</literal> keyword sets the compression level.
For <literal>gzip</literal> the compression level should be an
- integer between 1 and 9, for <literal>lz4</literal> an integer
- between 1 and 12, and for <literal>zstd</literal> an integer
- between 1 and 22.
+ integer between <literal>1</literal> and <literal>9</literal>
+ (default <literal>Z_DEFAULT_COMPRESSION</literal> or
+ <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>).
</para>
<para>