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Dir : ~/www/server/mysql/mysql-test/suite/binlog/t/
View File Name : binlog_group_commit_sync_no_delay_count.test

# WL#7742: test case that checks that the option
#          binlog_group_commit_sync_delay introduces a
#          delay in the group commit

--source include/have_binlog_format_mixed.inc
--source include/have_debug.inc

--let $delay=1000000
--let $count=2
--let $delay_as_secs= `SELECT $delay / 1000000.0`

--let $bgcd_saved=`SELECT @@GLOBAL.binlog_group_commit_sync_delay`
--let $bgcc_saved=`SELECT @@GLOBAL.binlog_group_commit_sync_no_delay_count`

CREATE TABLE t1 (c1 INT) Engine=InnoDB;
CREATE TABLE t2 (c1 INT) Engine=InnoDB;

--eval SET GLOBAL binlog_group_commit_sync_delay=$delay
--eval SET GLOBAL binlog_group_commit_sync_no_delay_count=$count

connect (con1, localhost, root,,);
connect (con2, localhost, root,,);

-- echo ######################## ASSERTION #1 #####################################
# assertion #1 : Make sure that even if group commit count is
#                set, if the timeout elapses the session gets
#                released.
--connection con1
SET DEBUG_SYNC='bgc_after_flush_stage_before_sync_stage SIGNAL go_con2_to_flush WAIT_FOR go_con1_to_sync';
--echo ============== CON1: FLUSHed and REAPed the QUEUE Waiting for CON2 to get to the FLUSH stage ============
SET @clock_in = SYSDATE();
--send INSERT INTO t1 VALUES (1)

--connection con2
SET DEBUG_SYNC='bgc_before_flush_stage SIGNAL go_con1_to_sync WAIT_FOR go_con2_to_flush';
SET DEBUG_SYNC='bgc_after_flush_stage_before_sync_stage WAIT_FOR go_con2_to_sync';
--echo ============== CON2: WILL FLUSH and REAP the QUEUE but only after CON1 has waited and signaled CON2 ============
SET @clock_in = SYSDATE();
--send INSERT INTO t2 VALUES (2)

--connection con1
--reap
SET @elapsed = TIMESTAMPDIFF(MICROSECOND, @clock_in, SYSDATE());

--echo ============== CON1: signal CON2 to resume and go into SYNC stage ============
SET DEBUG_SYNC = "now SIGNAL go_con2_to_sync";

--let $assert_text="Assert that con1 statement took more than the delay set."
--let $assert_cond= [SELECT @elapsed >= @@GLOBAL.binlog_group_commit_sync_delay]
--source include/assert.inc

--connection con2
--reap
--echo ============== CON2: RESUMES ============
SET @elapsed = TIMESTAMPDIFF(MICROSECOND, @clock_in, SYSDATE());

--let $assert_text="Assert that con2 statement took more than the delay set."
--let $assert_cond= [SELECT @elapsed >= @@GLOBAL.binlog_group_commit_sync_delay]
--source include/assert.inc

-- echo ######################## ASSERTION #2 #####################################
# assertion #2: Assert that if count is reached before the timeout elapses
#               then we get execution times lower than binlog_group_commit_sync_delay

--connection con1
--let $saved_debug=`SELECT @@GLOBAL.DEBUG`
SET GLOBAL DEBUG="d,bgc_set_infinite_delay";
--echo ============== CON1: enters wait_count_or_timeout waits for CON2 to enroll for the SYNC stage ============
SET DEBUG_SYNC='bgc_after_flush_stage_before_sync_stage WAIT_FOR go_con1_to_wait';
SET DEBUG_SYNC='bgc_wait_count_or_timeout SIGNAL go_con2_to_flush WAIT_FOR go_con1_resume_wait';
SET @clock_in = SYSDATE();
--send INSERT INTO t1 VALUES (1)

--connection con2
--echo ============== CON2: signals CON1 that it has enrolled for the SYNC stage ============
SET DEBUG_SYNC='bgc_before_flush_stage SIGNAL go_con1_to_wait WAIT_FOR go_con2_to_flush';
SET DEBUG_SYNC='bgc_after_enrolling_for_sync_stage SIGNAL go_con1_resume_wait';
--send INSERT INTO t2 VALUES (2)

--connection con1
--reap
--eval SET GLOBAL DEBUG="$saved_debug";
# if we have reached this point, the server did not wait ad eternum
# thus the test succeeds

--connection con2
--reap

--connection con1
--disconnect con1
--disconnect con2

--connection default

--eval SET GLOBAL binlog_group_commit_sync_no_delay_count=$bgcc_saved
--eval SET GLOBAL binlog_group_commit_sync_delay=$bgcd_saved

DROP TABLE t1, t2;