From c33b98db4746332fe5a8403a7a4828964a218012 Mon Sep 17 00:00:00 2001
From: Gervase Markham <gerv@gerv.net>
Date: Thu, 5 Mar 2015 11:28:51 +0000
Subject: Bug 1107310 - Mention max_allowed_packet in mysqldump section.
 r=LpSolit, a=glob

---
 docs/en/rst/installing/backups.rst | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/en/rst/installing/backups.rst b/docs/en/rst/installing/backups.rst
index c4d1ec863..4b1953c44 100644
--- a/docs/en/rst/installing/backups.rst
+++ b/docs/en/rst/installing/backups.rst
@@ -15,9 +15,11 @@ setup.
 MySQL
 -----
 
-:command:`mysqldump --opt -u $USERNAME -p $DATABASENAME > backup.sql`
+:command:`mysqldump --max-allowed-packet=32M -u $USERNAME -p $DATABASENAME > backup.sql`
 
-See the
+The value for :command:`max-allowed-packet` should be the value you've set in
+your :ref:`MySQL configuration file <mysql>`, and should be larger than the
+largest attachment in your database. See the
 `mysqldump documentation <http://dev.mysql.com/doc/mysql/en/mysqldump.html>`_
 for more information on :file:`mysqldump`.
 
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