connect con1, localhost, root;
create table t1 (a int) engine=innodb;
insert t1 values (1),(2),(3),(4);
delete from t1 where a=1;
select user,state from information_schema.processlist order by 2;
user	state
root	
root	Filling schema table
system user	InnoDB purge coordinator
system user	InnoDB purge worker
system user	InnoDB purge worker
system user	InnoDB purge worker
system user	InnoDB shutdown handler
set global debug_dbug='+d,only_kill_system_threads';
set global innodb_fast_shutdown=0;
shutdown;
connection default;
disconnect con1;
select user,state from information_schema.processlist order by 2;
user	state
root	Filling schema table
system user	InnoDB purge coordinator
system user	InnoDB purge worker
system user	InnoDB purge worker
system user	InnoDB purge worker
system user	InnoDB slow shutdown wait
set global innodb_fast_shutdown=1;
select user,state from information_schema.processlist order by 2;
user	state
root	Filling schema table
delete from t1 where a=3;
set global innodb_fast_shutdown=0;
ERROR 42000: Variable 'innodb_fast_shutdown' can't be set to the value of '0'
kill ID;
ERROR 70100: Connection was killed
drop table t1;