@ -156,6 +156,40 @@ GRANT ALL PRIVILEGES ON *.* TO 'mysql'@'localhost' WITH GRANT OPTION;
Support for built-in LCDs in various pieces of Logitech hardware (keyboards and USB speakers). <varname>hardware.logitech.lcd.enable</varname> enables support for all hardware supported by the g15daemon project.
</para>
</listitem>
<listitem>
<para>
Zabbix now defaults to 5.0, updated from 4.4. Please carefully read through
and apply any changes required. Be sure to take special note of the section on
<linkxlink:href="https://www.zabbix.com/documentation/current/manual/installation/upgrade_notes_500#enabling_extended_range_of_numeric_float_values">enabling extended range of numeric (float) values</link>
as you will need to apply this database migration manually.
</para>
<para>
If you are using Zabbix Server with a MySQL or MariaDB database you should note that using a character set of <literal>utf8</literal> and a collate of <literal>utf8_bin</literal> has become mandatory with
this release. See the upstream <linkxlink:href="https://support.zabbix.com/browse/ZBX-17357">issue</link> for further discussion. Before upgrading you should check the character set and collation used by
your database and ensure they are correct:
<programlisting>
SELECT
default_character_set_name,
default_collation_name
FROM
information_schema.schemata
WHERE
schema_name = 'zabbix';
</programlisting>
If these values are not correct you should take a backup of your database and convert the character set and collation as required. Here is an
<linkxlink:href="https://www.zabbix.com/forum/zabbix-help/396573-reinstall-after-upgrade?p=396891#post396891">example</link> of how to do so, taken from
the Zabbix forums:
<programlisting>
ALTER DATABASE `zabbix` DEFAULT CHARACTER SET utf8 COLLATE utf8_bin;
-- the following will produce a list of SQL commands you should subsequently execute
SELECT CONCAT("ALTER TABLE ", TABLE_NAME," CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;") AS ExecuteTheString
FROM information_schema.`COLUMNS`
WHERE table_schema = "zabbix" AND COLLATION_NAME = "utf8_general_ci";