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MySQL Cluster Manager 1.4 User Manual
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4.2.13 The show warnings Command

Using the show warnings command, you can check the warnings (up to the last five) issued to the agent log (mcmd.log). For example:

mcm> set delayed_insert_timeout:mysqld=400 mycluster;
+-----------------------------------+
| Command result                    |
+-----------------------------------+
| Cluster reconfigured successfully |
+-----------------------------------+

mcm> show warnings;
+---------+------+-----------------------------------------------------------------------+
| Level   | Code | Message                                                               |
+---------+------+-----------------------------------------------------------------------+
| Warning | -1   | Config variable delayed_insert_timeout was deprecated in mysqld 5.6.7 |
+---------+------+-----------------------------------------------------------------------+