mirror of
https://github.com/MariaDB/server.git
synced 2025-11-28 17:36:30 +03:00
3e40f9a7f3
purge_sys_t::sees(): Wrapper for view.sees(). trx_purge_truncate_history(): Invoke purge_sys.sees() instead of comparing to head.trx_no, to determine if undo pages can be safely freed. The test innodb.cursor-restore-locking was adjusted by Vladislav Lesin, as was the the debug instrumentation in row_purge_del_mark(). Reviewed by: Vladislav Lesin
44 lines
1.8 KiB
Plaintext
44 lines
1.8 KiB
Plaintext
SET @save_freq=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
|
|
SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
|
|
CREATE TABLE t (a int PRIMARY KEY, b int NOT NULL UNIQUE) engine = InnoDB, STATS_PERSISTENT=0;
|
|
InnoDB 0 transactions not purged
|
|
connect prevent_purge,localhost,root,,;
|
|
start transaction with consistent snapshot;
|
|
connect con_del_1,localhost,root,,;
|
|
INSERT INTO t VALUES (20,20);
|
|
SET DEBUG_SYNC = 'innodb_row_search_for_mysql_exit SIGNAL first_del_row_search_mvcc_finished WAIT_FOR first_del_cont';
|
|
DELETE FROM t WHERE b = 20 # trx_1;
|
|
connect con_ins_1,localhost,root,,;
|
|
SET DEBUG_SYNC = 'now WAIT_FOR first_del_row_search_mvcc_finished';
|
|
SET DEBUG_SYNC = 'lock_wait_suspend_thread_enter SIGNAL first_ins_locked';
|
|
SET DEBUG_SYNC = 'ib_after_row_insert SIGNAL first_ins_row_inserted WAIT_FOR first_ins_cont';
|
|
INSERT INTO t VALUES(10, 20) # trx_2;
|
|
connect con_del_2,localhost,root,,;
|
|
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
|
|
SET DEBUG_SYNC = 'now WAIT_FOR first_ins_locked';
|
|
SET DEBUG_SYNC = 'lock_wait_suspend_thread_enter SIGNAL second_del_locked';
|
|
DELETE FROM t WHERE b = 20 # trx_3;
|
|
connection default;
|
|
SET DEBUG_SYNC = 'now WAIT_FOR second_del_locked';
|
|
SET @saved_dbug = @@GLOBAL.debug_dbug;
|
|
SET @@GLOBAL.debug_dbug="d,enable_row_purge_del_mark_exit_sync_point";
|
|
SET DEBUG_SYNC = 'now SIGNAL first_del_cont';
|
|
SET DEBUG_SYNC = 'now WAIT_FOR first_ins_row_inserted';
|
|
connection con_del_1;
|
|
connection default;
|
|
disconnect prevent_purge;
|
|
SET DEBUG_SYNC = 'now WAIT_FOR row_purge_del_mark_finished';
|
|
SET @@GLOBAL.debug_dbug = @saved_dbug;
|
|
SET DEBUG_SYNC = 'now SIGNAL first_ins_cont';
|
|
connection con_del_2;
|
|
connection con_ins_1;
|
|
connection default;
|
|
INSERT INTO t VALUES(30, 20);
|
|
disconnect con_ins_1;
|
|
disconnect con_del_1;
|
|
disconnect con_del_2;
|
|
connection default;
|
|
SET DEBUG_SYNC = 'RESET';
|
|
DROP TABLE t;
|
|
SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_freq;
|