From: Magnus Hagander <magnus@hagander.net>
Date: Mon, 8 Dec 2008 15:11:42 +0000 (+0000)
Subject: Add note that autovacuum can use up several times maintenance_work_mem,
X-Git-Tag: recoveryinfrav9~228
X-Git-Url: http://waps.l3s.uni-hannover.de/gitweb/?a=commitdiff_plain;h=f40cbece317327441a4807fa3b42d6ef41ffc2fb;p=users%2Fsimon%2Fpostgres.git

Add note that autovacuum can use up several times maintenance_work_mem,
with warning against setting it too high.
---

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 5acdb5f8ee..099c14da7c 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -881,6 +881,11 @@ SET ENABLE_SEQSCAN TO OFF;
         than <varname>work_mem</varname>.  Larger settings might improve
         performance for vacuuming and for restoring database dumps.
        </para>
+       <para>
+        Note that when autovacuum runs, up to
+        <xref linkend="guc-autovacuum-max-workers"> times this memory may be
+        allocated, so be careful not to set the default value too high.
+       </para>
       </listitem>
      </varlistentry>