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-rw-r--r--doc/src/sgml/ref/pg_dump.sgml13
1 files changed, 9 insertions, 4 deletions
diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index 06d9c68ae0e..11aa4b963eb 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -1,5 +1,5 @@
<!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.65.2.2 2004/10/21 22:49:04 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.65.2.3 2008/08/26 00:03:52 tgl Exp $
PostgreSQL documentation
-->
@@ -468,9 +468,14 @@ PostgreSQL documentation
<term><option>--compress=<replaceable class="parameter">0..9</replaceable></option></term>
<listitem>
<para>
- Specify the compression level to use in archive formats that
- support compression. (Currently only the custom archive
- format supports compression.)
+ Specify the compression level to use. Zero means no compression.
+ For the custom archive format, this specifies compression of
+ individual table-data segments, and the default is to compress
+ at a moderate level.
+ For plain text output, setting a nonzero compression level causes
+ the entire output file to be compressed, as though it had been
+ fed through <application>gzip</>; but the default is not to compress.
+ The tar archive format currently does not support compression at all.
</para>
</listitem>
</varlistentry>