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--source include/have_debug.inc
--echo # Prepare schema.
CREATE TABLE t (a INT PRIMARY KEY, b CHAR(100));
--echo # Disable the dict_stats thread and the master thread to avoid redo log records being created in background.
SET GLOBAL innodb_dict_stats_disabled_debug = 1;
SET GLOBAL innodb_master_thread_disabled_debug = 1;
--echo # Execute sharp checkpoint.
SET GLOBAL innodb_log_checkpoint_now = 1;
--echo # Ensure that redo log is logically empty (within 1 block)
--let $assert_text='Redo log is logically empty (has 1 block)'
--let $assert_cond= "[SELECT variable_value FROM performance_schema.global_status WHERE variable_name = \'Innodb_redo_log_logical_size\']" = 512
--source include/assert.inc
--echo # Disable page cleaners and prevent page flushing/checkpointing.
--source ../include/log_disable_page_cleaners.inc
--echo # Apply some modifications.
INSERT INTO t(a,b) VALUES (1, REPEAT('x',100)), (2, REPEAT('x',100)), (3, REPEAT('x',100)),
(4, REPEAT('x',100)), (5, REPEAT('x',100)), (6, REPEAT('x',100));
UPDATE t SET b = REPEAT('y',100);
--echo # Wait until the logical size is updated:
SET GLOBAL DEBUG = '+d,syncpoint_log_status_variables_updated';
SET DEBUG_SYNC = 'now WAIT_FOR reached_log_status_variables_updated';
SET GLOBAL DEBUG = '-d,syncpoint_log_status_variables_updated';
SET DEBUG_SYNC = 'now SIGNAL continue_log_status_variables_updated';
--echo # Check if the logical size of the redo log is greater than 1kB.
--let $REDO_LOG_SIZE= `SELECT variable_value FROM performance_schema.global_status WHERE variable_name = 'Innodb_redo_log_logical_size'`
--let $assert_text='Redo log has more than 1kB of logical data'
--let $assert_cond= "$REDO_LOG_SIZE" > 1024
--source include/assert.inc
--echo # Apply single row modification.
UPDATE t SET b = REPEAT('z',100) WHERE a=1;
--echo # Wait until the logical size is updated:
SET GLOBAL DEBUG = '+d,syncpoint_log_status_variables_updated';
SET DEBUG_SYNC = 'now WAIT_FOR reached_log_status_variables_updated';
SET GLOBAL DEBUG = '-d,syncpoint_log_status_variables_updated';
SET DEBUG_SYNC = 'now SIGNAL continue_log_status_variables_updated';
--echo # Check if the logical size increase is in proper range (between 100bytes and 1kB).
--let $NEW_REDO_LOG_SIZE= `SELECT variable_value FROM performance_schema.global_status WHERE variable_name = 'Innodb_redo_log_logical_size'`
--let $INCREASE= `SELECT $NEW_REDO_LOG_SIZE - $REDO_LOG_SIZE`
--let $assert_text='Redo log increased by at least 100 bytes'
--let $assert_cond= "$INCREASE" >= 100
--source include/assert.inc
--let $assert_text='Redo log increased by no more than 16kB'
--let $assert_cond= "$INCREASE" <= 16*1024
--source include/assert.inc
--echo # Enable page cleaners, page flushing and log checkpointing.
--source ../include/log_enable_page_cleaners.inc
--echo # Execute sharp checkpoint.
SET GLOBAL innodb_log_checkpoint_now = 1;
--echo # Ensure that redo log is logically empty (within 1 block)
--let $assert_text='Redo log is logically empty (has 1 block)'
--let $assert_cond= "[SELECT variable_value FROM performance_schema.global_status WHERE variable_name = \'Innodb_redo_log_logical_size\']" = 512
--source include/assert.inc
--echo # Enable the dict_stats thread and the master thread.
SET GLOBAL innodb_dict_stats_disabled_debug = 0;
SET GLOBAL innodb_master_thread_disabled_debug = 0;
--echo # Cleanup.
DROP TABLE t;
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