database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-24 19:42:23 +03:00
Code Activity
Files
b923b80cfd8628ef973019bf3dba76dda8d940c4
mariadb/mysql-test/suite/binlog_encryption/rpl_parallel_slave_bgc_kill.result
Marko Mäkelä 3cef4f8f0f MDEV-515 Reduce InnoDB undo logging for insert into empty table 
We implement an idea that was suggested by Michael 'Monty' Widenius
in October 2017: When InnoDB is inserting into an empty table or partition,
we can write a single undo log record TRX_UNDO_EMPTY, which will cause
ROLLBACK to clear the table.

For this to work, the insert into an empty table or partition must be
covered by an exclusive table lock that will be held until the transaction
has been committed or rolled back, or the INSERT operation has been
rolled back (and the table is empty again), in lock_table_x_unlock().

Clustered index records that are covered by the TRX_UNDO_EMPTY record
will carry DB_TRX_ID=0 and DB_ROLL_PTR=1<<55, and thus they cannot
be distinguished from what MDEV-12288 leaves behind after purging the
history of row-logged operations.

Concurrent non-locking reads must be adjusted: If the read view was
created before the INSERT into an empty table, then we must continue
to imagine that the table is empty, and not try to read any records.
If the read view was created after the INSERT was committed, then
all records must be visible normally. To implement this, we introduce
the field dict_table_t::bulk_trx_id.

This special handling only applies to the very first INSERT statement
of a transaction for the empty table or partition. If a subsequent
statement in the transaction is modifying the initially empty table again,
we must enable row-level undo logging, so that we will be able to
roll back to the start of the statement in case of an error (such as
duplicate key).

INSERT IGNORE will continue to use row-level logging and locking, because
implementing it would require the ability to roll back the latest row.
Since the undo log that we write only allows us to roll back the entire
statement, we cannot support INSERT IGNORE. We will introduce a
handler::extra() parameter HA_EXTRA_IGNORE_INSERT to indicate to storage
engines that INSERT IGNORE is being executed.

In many test cases, we add an extra record to the table, so that during
the 'interesting' part of the test, row-level locking and logging will
be used.

Replicas will continue to use row-level logging and locking until
MDEV-24622 has been addressed. Likewise, this optimization will be
disabled in Galera cluster until MDEV-24623 enables it.

dict_table_t::bulk_trx_id: The latest active or committed transaction
that initiated an insert into an empty table or partition.
Protected by exclusive table lock and a clustered index leaf page latch.

ins_node_t::bulk_insert: Whether bulk insert was initiated.

trx_t::mod_tables: Use C++11 style accessors (emplace instead of insert).
Unlike earlier, this collection will cover also temporary tables.

trx_mod_table_time_t: Add start_bulk_insert(), end_bulk_insert(),
is_bulk_insert(), was_bulk_insert().

trx_undo_report_row_operation(): Before accessing any undo log pages,
invoke trx->mod_tables.emplace() in order to determine whether undo
logging was disabled, or whether this is the first INSERT and we are
supposed to write a TRX_UNDO_EMPTY record.

row_ins_clust_index_entry_low(): If we are inserting into an empty
clustered index leaf page, set the ins_node_t::bulk_insert flag for
the subsequent trx_undo_report_row_operation() call.

lock_rec_insert_check_and_lock(), lock_prdt_insert_check_and_lock():
Remove the redundant parameter 'flags' that can be checked in the caller.

btr_cur_ins_lock_and_undo(): Simplify the logic. Correctly write
DB_TRX_ID,DB_ROLL_PTR after invoking trx_undo_report_row_operation().

trx_mark_sql_stat_end(), ha_innobase::extra(HA_EXTRA_IGNORE_INSERT),
ha_innobase::external_lock(): Invoke trx_t::end_bulk_insert() so that
the next statement will not be covered by table-level undo logging.

ReadView::changes_visible(trx_id_t) const: New accessor for the case
where the trx_id_t is not read from a potentially corrupted index page
but directly from the memory. In this case, we can skip a sanity check.

row_sel(), row_sel_try_search_shortcut(), row_search_mvcc():
row_sel_try_search_shortcut_for_mysql(),
row_merge_read_clustered_index(): Check dict_table_t::bulk_trx_id.

row_sel_clust_sees(): Replaces lock_clust_rec_cons_read_sees().

lock_sec_rec_cons_read_sees(): Replaced with lower-level code.

btr_root_page_init(): Refactored from btr_create().

dict_index_t::clear(), dict_table_t::clear(): Empty an index or table,
for the ROLLBACK of an INSERT operation.

ROW_T_EMPTY, ROW_OP_EMPTY: Note a concurrent ROLLBACK of an INSERT
into an empty table.

This is joint work with Thirunarayanan Balathandayuthapani,
who created a working prototype.
Thanks to Matthias Leich for extensive testing.
2021-01-25 18:41:27 +02:00

334 lines
8.9 KiB
Plaintext
Raw Blame History

*** Test killing slave threads at various wait points ***
include/master-slave.inc
[connection master]
connection server_2;
SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
SET @old_parallel_mode=@@GLOBAL.slave_parallel_mode;
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=10;
SET GLOBAL slave_parallel_mode='conservative';
CHANGE MASTER TO master_use_gtid=slave_pos;
include/start_slave.inc
connection server_1;
connect con_temp3,127.0.0.1,root,,test,$SERVER_MYPORT_1,;
connect con_temp4,127.0.0.1,root,,test,$SERVER_MYPORT_1,;
connect con_temp5,127.0.0.1,root,,test,$SERVER_MYPORT_1,;
ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
CREATE TABLE t1 (a int PRIMARY KEY) ENGINE=MyISAM;
CREATE TABLE t2 (a int PRIMARY KEY) ENGINE=InnoDB;
CREATE TABLE t3 (a INT PRIMARY KEY, b INT) ENGINE=InnoDB;
INSERT INTO t2 VALUES(100);
INSERT INTO t3 VALUES(100, 100);
connection server_2;
connection server_1;
SET sql_log_bin=0;
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
RETURNS INT DETERMINISTIC
BEGIN
RETURN x;
END
||
SET sql_log_bin=1;
connection server_2;
SET sql_log_bin=0;
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
RETURNS INT DETERMINISTIC
BEGIN
IF d1 != '' THEN
SET debug_sync = d1;
END IF;
IF d2 != '' THEN
SET debug_sync = d2;
END IF;
RETURN x;
END
||
SET sql_log_bin=1;
*** 1. Test killing transaction waiting in commit for previous transaction to commit ***
connection con_temp3;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued1 WAIT_FOR master_cont1';
INSERT INTO t3 VALUES (31, foo(31,
'commit_before_prepare_ordered WAIT_FOR t2_waiting',
'commit_after_prepare_ordered SIGNAL t1_ready WAIT_FOR t1_cont'));
connection server_1;
SET debug_sync='now WAIT_FOR master_queued1';
connection con_temp4;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued2';
BEGIN;
INSERT INTO t3 VALUES (32, foo(32,
'ha_write_row_end SIGNAL t2_query WAIT_FOR t2_cont',
''));
INSERT INTO t3 VALUES (33, foo(33,
'group_commit_waiting_for_prior SIGNAL t2_waiting',
'group_commit_waiting_for_prior_killed SIGNAL t2_killed'));
COMMIT;
connection server_1;
SET debug_sync='now WAIT_FOR master_queued2';
connection con_temp5;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued3';
INSERT INTO t3 VALUES (34, foo(34,
'',
''));
connection server_1;
SET debug_sync='now WAIT_FOR master_queued3';
SET debug_sync='now SIGNAL master_cont1';
connection con_temp3;
connection con_temp4;
connection con_temp5;
connection server_1;
SELECT * FROM t3 WHERE a >= 30 ORDER BY a;
a b
31 31
32 32
33 33
34 34
100 100
SET debug_sync='RESET';
connection server_2;
SET sql_log_bin=0;
CALL mtr.add_suppression("Query execution was interrupted");
CALL mtr.add_suppression("Commit failed due to failure of an earlier commit on which this one depends");
CALL mtr.add_suppression("Slave: Connection was killed");
SET sql_log_bin=1;
SET debug_sync='now WAIT_FOR t2_query';
SET debug_sync='now SIGNAL t2_cont';
SET debug_sync='now WAIT_FOR t1_ready';
KILL THD_ID;
SET debug_sync='now WAIT_FOR t2_killed';
SET debug_sync='now SIGNAL t1_cont';
include/wait_for_slave_sql_error.inc [errno=1317,1927,1964]
STOP SLAVE IO_THREAD;
SELECT * FROM t3 WHERE a >= 30 ORDER BY a;
a b
31 31
100 100
SET debug_sync='RESET';
SET GLOBAL slave_parallel_threads=0;
SET GLOBAL slave_parallel_threads=10;
SET sql_log_bin=0;
DROP FUNCTION foo;
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
RETURNS INT DETERMINISTIC
BEGIN
RETURN x;
END
||
SET sql_log_bin=1;
connection server_1;
INSERT INTO t3 VALUES (39,0);
connection server_2;
include/start_slave.inc
SELECT * FROM t3 WHERE a >= 30 ORDER BY a;
a b
31 31
32 32
33 33
34 34
39 0
100 100
SET sql_log_bin=0;
DROP FUNCTION foo;
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
RETURNS INT DETERMINISTIC
BEGIN
IF d1 != '' THEN
SET debug_sync = d1;
END IF;
IF d2 != '' THEN
SET debug_sync = d2;
END IF;
RETURN x;
END
||
SET sql_log_bin=1;
connection server_2;
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=0;
SET GLOBAL slave_parallel_threads=10;
include/start_slave.inc
*** 2. Same as (1), but without restarting IO thread after kill of SQL threads ***
connection con_temp3;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued1 WAIT_FOR master_cont1';
INSERT INTO t3 VALUES (41, foo(41,
'commit_before_prepare_ordered WAIT_FOR t2_waiting',
'commit_after_prepare_ordered SIGNAL t1_ready WAIT_FOR t1_cont'));
connection server_1;
SET debug_sync='now WAIT_FOR master_queued1';
connection con_temp4;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued2';
BEGIN;
INSERT INTO t3 VALUES (42, foo(42,
'ha_write_row_end SIGNAL t2_query WAIT_FOR t2_cont',
''));
INSERT INTO t3 VALUES (43, foo(43,
'group_commit_waiting_for_prior SIGNAL t2_waiting',
'group_commit_waiting_for_prior_killed SIGNAL t2_killed'));
COMMIT;
connection server_1;
SET debug_sync='now WAIT_FOR master_queued2';
connection con_temp5;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued3';
INSERT INTO t3 VALUES (44, foo(44,
'',
''));
connection server_1;
SET debug_sync='now WAIT_FOR master_queued3';
SET debug_sync='now SIGNAL master_cont1';
connection con_temp3;
connection con_temp4;
connection con_temp5;
connection server_1;
SELECT * FROM t3 WHERE a >= 40 ORDER BY a;
a b
41 41
42 42
43 43
44 44
100 100
SET debug_sync='RESET';
connection server_2;
SET debug_sync='now WAIT_FOR t2_query';
SET debug_sync='now SIGNAL t2_cont';
SET debug_sync='now WAIT_FOR t1_ready';
KILL THD_ID;
SET debug_sync='now WAIT_FOR t2_killed';
SET debug_sync='now SIGNAL t1_cont';
include/wait_for_slave_sql_error.inc [errno=1317,1927,1964]
SET debug_sync='RESET';
SET GLOBAL slave_parallel_threads=0;
SET GLOBAL slave_parallel_threads=10;
SET sql_log_bin=0;
DROP FUNCTION foo;
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
RETURNS INT DETERMINISTIC
BEGIN
RETURN x;
END
||
SET sql_log_bin=1;
connection server_1;
INSERT INTO t3 VALUES (49,0);
connection server_2;
START SLAVE SQL_THREAD;
SELECT * FROM t3 WHERE a >= 40 ORDER BY a;
a b
41 41
42 42
43 43
44 44
49 0
100 100
SET sql_log_bin=0;
DROP FUNCTION foo;
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
RETURNS INT DETERMINISTIC
BEGIN
IF d1 != '' THEN
SET debug_sync = d1;
END IF;
IF d2 != '' THEN
SET debug_sync = d2;
END IF;
RETURN x;
END
||
SET sql_log_bin=1;
connection server_2;
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=0;
SET GLOBAL slave_parallel_threads=10;
include/start_slave.inc
*** 3. Same as (2), but not using gtid mode ***
connection server_2;
include/stop_slave.inc
CHANGE MASTER TO master_use_gtid=no;
include/start_slave.inc
connection server_1;
connection con_temp3;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued1 WAIT_FOR master_cont1';
INSERT INTO t3 VALUES (51, foo(51,
'commit_before_prepare_ordered WAIT_FOR t2_waiting',
'commit_after_prepare_ordered SIGNAL t1_ready WAIT_FOR t1_cont'));
connection server_1;
SET debug_sync='now WAIT_FOR master_queued1';
connection con_temp4;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued2';
BEGIN;
INSERT INTO t3 VALUES (52, foo(52,
'ha_write_row_end SIGNAL t2_query WAIT_FOR t2_cont',
''));
INSERT INTO t3 VALUES (53, foo(53,
'group_commit_waiting_for_prior SIGNAL t2_waiting',
'group_commit_waiting_for_prior_killed SIGNAL t2_killed'));
COMMIT;
connection server_1;
SET debug_sync='now WAIT_FOR master_queued2';
connection con_temp5;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued3';
INSERT INTO t3 VALUES (54, foo(54,
'',
''));
connection server_1;
SET debug_sync='now WAIT_FOR master_queued3';
SET debug_sync='now SIGNAL master_cont1';
connection con_temp3;
connection con_temp4;
connection con_temp5;
connection server_1;
SELECT * FROM t3 WHERE a >= 50 ORDER BY a;
a b
51 51
52 52
53 53
54 54
100 100
SET debug_sync='RESET';
connection server_2;
SET debug_sync='now WAIT_FOR t2_query';
SET debug_sync='now SIGNAL t2_cont';
SET debug_sync='now WAIT_FOR t1_ready';
KILL THD_ID;
SET debug_sync='now WAIT_FOR t2_killed';
SET debug_sync='now SIGNAL t1_cont';
include/wait_for_slave_sql_error.inc [errno=1317,1927,1964]
SELECT * FROM t3 WHERE a >= 50 ORDER BY a;
a b
51 51
100 100
SET debug_sync='RESET';
SET GLOBAL slave_parallel_threads=0;
SET GLOBAL slave_parallel_threads=10;
SET sql_log_bin=0;
DROP FUNCTION foo;
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
RETURNS INT DETERMINISTIC
BEGIN
RETURN x;
END
||
SET sql_log_bin=1;
connection server_1;
INSERT INTO t3 VALUES (59,0);
connection server_2;
START SLAVE SQL_THREAD;
SELECT * FROM t3 WHERE a >= 50 ORDER BY a;
a b
51 51
52 52
53 53
54 54
59 0
100 100
connection server_2;
include/stop_slave.inc
CHANGE MASTER TO master_use_gtid=slave_pos;
SET GLOBAL slave_parallel_threads=@old_parallel_threads;
SET GLOBAL slave_parallel_mode=@old_parallel_mode;
include/start_slave.inc
SET DEBUG_SYNC= 'RESET';
connection server_1;
DROP function foo;
DROP TABLE t1,t2,t3;
SET DEBUG_SYNC= 'RESET';
include/rpl_end.inc
View Git Blame Copy Permalink