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-rw-r--r--doc/src/sgml/config.sgml6
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 6098f6b0202..381d8636ab4 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1893,6 +1893,12 @@ include_dir 'conf.d'
too high. It may be useful to control for this by separately
setting <xref linkend="guc-autovacuum-work-mem"/>.
</para>
+ <para>
+ Additionally, <command>VACUUM</command> is only able to utilize up to
+ a maximum of <literal>1GB</literal> of memory, so
+ <varname>maintenance_work_mem</varname> values higher than this have
+ no effect on <command>VACUUM</command>.
+ </para>
</listitem>
</varlistentry>