SHOW VARIABLES LIKE 'server_id';
Variable_name	Value
server_id	1
SHOW INSTANCES;
instance_name	state
mysqld1	XXXXX
mysqld2	offline
UNSET mysqld1.server_id;
ERROR HY000: The instance is active. Stop the instance first
SET mysqld1.server_id = 11;
ERROR HY000: The instance is active. Stop the instance first
CREATE INSTANCE mysqld3
datadir = '/',
server_id = 3,
socket = "$MYSQL_TMP_DIR/mysqld_3.sock";
START INSTANCE mysqld3;
UNSET mysqld3.server_id;
ERROR HY000: The instance is active. Stop the instance first
SET mysqld3.server_id = 11;
ERROR HY000: The instance is active. Stop the instance first
STOP INSTANCE mysqld3;
SHOW INSTANCE STATUS mysqld3;
instance_name	state	version_number	version	mysqld_compatible
mysqld3	offline	VERSION_NUMBER	VERSION	no
UNSET mysqld2.server_id;
UNSET mysqld2.server_id;
SHOW INSTANCE OPTIONS mysqld2;
option_name	value
instance_name	option_value
socket	option_value
pid-file	option_value
port	option_value
datadir	option_value
log	option_value
log-error	option_value
log-slow-queries	option_value
language	option_value
character-sets-dir	option_value
basedir	option_value
shutdown-delay	option_value
skip-stack-trace	option_value
loose-skip-innodb	option_value
loose-skip-ndbcluster	option_value
nonguarded	option_value
log-output	option_value
SET mysqld2.server_id = 2;
SET mysqld2.server_id = 2;
SHOW INSTANCE OPTIONS mysqld2;
option_name	value
instance_name	option_value
socket	option_value
pid-file	option_value
port	option_value
datadir	option_value
log	option_value
log-error	option_value
log-slow-queries	option_value
language	option_value
character-sets-dir	option_value
basedir	option_value
shutdown-delay	option_value
skip-stack-trace	option_value
loose-skip-innodb	option_value
loose-skip-ndbcluster	option_value
nonguarded	option_value
log-output	option_value
server_id	option_value
UNSET mysqld2.server_id = 11;
ERROR 42000: You have an error in your command syntax. Check the manual that corresponds to your MySQL Instance Manager version for the right syntax to use
SET mysqld2.aaa, mysqld3.bbb, mysqld2.ccc = 0010, mysqld3.ddd = 0020;
--------------------------------------------------------------------
aaa
--------------------------------------------------------------------
bbb
--------------------------------------------------------------------
ccc=0010
--------------------------------------------------------------------
ddd=0020
--------------------------------------------------------------------
UNSET mysqld2.aaa, mysqld3.bbb, mysqld2.ccc, mysqld3.ddd;
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
SET mysqld2.aaa, mysqld3.bbb, mysqld.ccc = 0010;
ERROR HY000: Unknown instance name
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
SET mysqld2.aaa, mysqld3.bbb, mysqld1.ccc = 0010;
ERROR HY000: The instance is active. Stop the instance first
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
UNSET mysqld2.server_id, mysqld3.server_id, mysqld.ccc;
ERROR HY000: Unknown instance name
--------------------------------------------------------------------
server_id           = 1
server_id=2
server_id=3
--------------------------------------------------------------------
UNSET mysqld2.server_id, mysqld3.server_id, mysqld1.ccc;
ERROR HY000: The instance is active. Stop the instance first
--------------------------------------------------------------------
server_id           = 1
server_id=2
server_id=3
--------------------------------------------------------------------
DROP INSTANCE mysqld3;
SET mysqld2.server_id=222;
SET mysqld2.server_id = 222;
SET   mysqld2.server_id   =  222  ;
SET   mysqld2  .  server_id  =  222  ;
SET   mysqld2  .  server_id  =  222  , mysqld2  .  aaa  , mysqld2  .  bbb  ;
--------------------------------------------------------------------
server_id           = 1
server_id=222
--------------------------------------------------------------------
aaa
--------------------------------------------------------------------
bbb
--------------------------------------------------------------------
UNSET mysqld2  . aaa  ,  mysqld2  .  bbb ;
--------------------------------------------------------------------
server_id           = 1
server_id=222
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
--------------------------------------------------------------------
server_id           = 1
server_id=222
--------------------------------------------------------------------
SHOW VARIABLES LIKE 'server_id';
Variable_name	Value
server_id	1
SHOW INSTANCES;
instance_name	state
mysqld1	online
mysqld2	offline
FLUSH INSTANCES;
ERROR HY000: At least one instance is active. Stop all instances first
STOP INSTANCE mysqld1;
SHOW INSTANCES;
instance_name	state
mysqld1	offline
mysqld2	offline
FLUSH INSTANCES;