--source include/master-slave.inc

--source include/have_binlog_format_row.inc

--echo #

--echo # Initialize test data

--connection master

create table t1 (a int);

insert into t1 values (1);

--source include/save_master_gtid.inc

--connection slave

--source include/sync_with_master_gtid.inc

--source include/stop_slave.inc

CHANGE MASTER TO MASTER_DELAY=4, MASTER_USE_GTID=Slave_Pos;

set @@global.slave_parallel_threads= 4;

--source include/start_slave.inc

--echo # Set up a long interval between now and the next event to boost SBM

--connection master

--sleep 10

--let $ctr=8

while($ctr)

{

    --connection slave

    # On the first iteration, SBM will be 0 because there are no new events

    --let $status_items= Seconds_Behind_Master

    --source include/show_slave_status.inc

    --connection master

    --eval insert into t1 values ($ctr)

    --send select sleep(1)

    --dec $ctr

    # On the first iteration, SBM will boost to 10 because of the long

    # interval, despite only just receiving the event

    --connection slave

    --source include/show_slave_status.inc

    --connection master

    --reap

}

--echo #

--echo # Cleanup

--connection master

DROP TABLE t1;

--source include/save_master_gtid.inc

--connection slave

--source include/sync_with_master_gtid.inc

--source include/stop_slave.inc

CHANGE MASTER TO MASTER_DELAY=0;

set @@global.slave_parallel_threads= 0;

--source include/start_slave.inc

--source include/rpl_end.inc

--echo # End of tests