MDEV-32050: Deprecate&ignore innodb_purge_rseg_truncate_frequency

The motivation of introducing the parameter
innodb_purge_rseg_truncate_frequency in
mysql/mysql-server@28bbd66ea5f6acf80fcb381057bb7ca5b7b188d2 and
mysql/mysql-server@8fc2120fed11d2498ecb3635d87f414c76985fce
seems to have been to avoid stalls due to freeing undo log pages
or truncating undo log tablespaces. In MariaDB Server,
innodb_undo_log_truncate=ON should be a much lighter operation
than in MySQL, because it will not involve any log checkpoint.

Another source of performance stalls should be
trx_purge_truncate_rseg_history(), which is shrinking the history list
by freeing the undo log pages whose undo records have been purged.
To alleviate that, we will introduce a purge_truncation_task that will
offload this from the purge_coordinator_task. In that way, the next
innodb_purge_batch_size pages may be parsed and purged while the pages
from the previous batch are being freed and the history list being shrunk.

The processing of innodb_undo_log_truncate=ON will still remain the
responsibility of the purge_coordinator_task.

purge_coordinator_state::count: Remove. We will ignore
innodb_purge_rseg_truncate_frequency, and act as if it had been
set to 1 (the maximum shrinking frequency).

purge_coordinator_state::do_purge(): Invoke an asynchronous task
purge_truncation_callback() to free the undo log pages.

purge_sys_t::iterator::free_history(): Free those undo log pages
that have been processed. This used to be a part of
trx_purge_truncate_history().

purge_sys_t::clone_end_view(): Take a new value of purge_sys.head
as a parameter, so that it will be updated while holding exclusive
purge_sys.latch. This is needed for race-free access to the field
in purge_truncation_callback().

Reviewed by: Vladislav Lesin

extra/mariabackup/xtrabackup.cc

@@ -1868,7 +1868,7 @@ static int prepare_export()
       IF_WIN("\"","") "\"%s\" --mysqld \"%s\""
       " --defaults-extra-file=./backup-my.cnf --defaults-group-suffix=%s --datadir=."
       " --innodb --innodb-fast-shutdown=0 --loose-partition"
-      " --innodb_purge_rseg_truncate_frequency=1 --innodb-buffer-pool-size=%llu"
+      " --innodb-buffer-pool-size=%llu"
       " --console --skip-log-error --skip-log-bin --bootstrap %s< "
       BOOTSTRAP_FILENAME IF_WIN("\"",""),
       mariabackup_exe,
@@ -1882,7 +1882,7 @@ static int prepare_export()
       IF_WIN("\"","") "\"%s\" --mysqld"
       " --defaults-file=./backup-my.cnf --defaults-group-suffix=%s --datadir=."
       " --innodb --innodb-fast-shutdown=0 --loose-partition"
-      " --innodb_purge_rseg_truncate_frequency=1 --innodb-buffer-pool-size=%llu"
+      " --innodb-buffer-pool-size=%llu"
       " --console --log-error= --skip-log-bin --bootstrap %s< "
       BOOTSTRAP_FILENAME IF_WIN("\"",""),
       mariabackup_exe,

mysql-test/suite/encryption/t/innodb-bad-key-change.opt

---innodb-purge-rseg-truncate-frequency=1
 --skip-innodb-fast-shutdown

mysql-test/suite/encryption/t/innodb-bad-key-change2.opt

---innodb-purge-rseg-truncate-frequency=1
 --skip-innodb-fast-shutdown

mysql-test/suite/encryption/t/innodb-bad-key-change4.opt

@@ -2,5 +2,4 @@
 --loose-innodb-buffer-page
 --loose-innodb-buffer-page-lru
 --innodb-defragment=1
---innodb-purge-rseg-truncate-frequency=1
 --skip-innodb-fast-shutdown

mysql-test/suite/encryption/t/innodb-compressed-blob.opt

@@ -2,5 +2,4 @@
 --innodb-tablespaces-encryption
 --innodb-encrypt-tables=on
 --innodb-encryption-threads=4
---innodb-purge-rseg-truncate-frequency=1
 --skip-innodb-fast-shutdown

mysql-test/suite/encryption/t/innodb-encryption-disable.opt

---innodb-purge-rseg-truncate-frequency=1
 --skip-innodb-fast-shutdown

mysql-test/suite/encryption/t/innodb-force-corrupt.opt

---innodb-purge-rseg-truncate-frequency=1
 --skip-innodb-fast-shutdown

mysql-test/suite/encryption/t/innodb-missing-key.opt

@@ -2,5 +2,4 @@
 --innodb-encryption-rotate-key-age=15
 --innodb-encryption-threads=4
 --innodb-tablespaces-encryption
---innodb-purge-rseg-truncate-frequency=1
 --skip-innodb-fast-shutdown

mysql-test/suite/encryption/t/innodb-redo-badkey.opt

@@ -3,5 +3,4 @@
 --innodb-tablespaces-encryption
 --innodb-encryption-threads=2
 --innodb-default-encryption-key-id=4
---innodb-purge-rseg-truncate-frequency=1
 --skip-innodb-fast-shutdown

mysql-test/suite/gcol/r/gcol_partition_innodb.result

 SET @@session.default_storage_engine = 'InnoDB';
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 drop table if exists t1;
 # Case 1. Partitioning by RANGE based on a non-stored generated column.
 CREATE TABLE t1 (
@@ -135,4 +133,3 @@ DROP FUNCTION IF EXISTS f1;
 DROP TRIGGER IF EXISTS trg1;
 DROP TRIGGER IF EXISTS trg2;
 set sql_warnings = 0;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/gcol/r/gcol_purge.result

-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
 SET @save_dbug=@@GLOBAL.debug_dbug;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 CREATE TABLE t1(f1 INT NOT NULL, f2 int not null,
 f3 int generated always as (f2 * 2) VIRTUAL,
 primary key(f1), INDEX (f3))ENGINE=InnoDB;
@@ -22,6 +20,5 @@ commit;
 disconnect con1;
 disconnect con2;
 connection default;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;
 SET GLOBAL debug_dbug=@save_dbug;
 DROP TABLE t1;

mysql-test/suite/gcol/r/gcol_update.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 connect  purge_control,localhost,root;
 START TRANSACTION WITH CONSISTENT SNAPSHOT;
 connection default;
@@ -39,4 +37,3 @@ InnoDB		0 transactions not purged
 disconnect purge_control;
 connection default;
 drop table t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/gcol/r/innodb_virtual_debug_purge.result

 set default_storage_engine=innodb;
 set @old_dbug=@@global.debug_dbug;
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 SET @saved_stats_persistent = @@GLOBAL.innodb_stats_persistent;
 SET GLOBAL innodb_stats_persistent = OFF;
 CREATE TABLE `t` (
@@ -204,5 +202,4 @@ disconnect truncate;
 connection default;
 DROP TABLE t1, t2;
 set debug_sync=reset;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;
 SET GLOBAL innodb_stats_persistent = @saved_stats_persistent;

mysql-test/suite/gcol/r/innodb_virtual_index.result

 SET default_storage_engine= innodb;
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 #
 # Bug 21922176 - PREBUILT->SEARCH_TUPLE CREATED WITHOUT INCLUDING
 # THE NUMBER OF VIRTUAL COLUMNS
@@ -194,7 +192,6 @@ ALTER TABLE t1 ADD COLUMN col7a INT GENERATED ALWAYS AS (col1 % col2)
 VIRTUAL, ADD UNIQUE index idx (col1), algorithm=inplace;
 ERROR 0A000: ALGORITHM=INPLACE is not supported. Reason: INPLACE ADD or DROP of virtual columns cannot be combined with other ALTER TABLE actions. Try ALGORITHM=COPY
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;
 #
 # Bug 27122803 - BACKPORT FIX FOR BUG 25899959 TO MYSQL-5.7
 #

mysql-test/suite/gcol/r/innodb_virtual_purge.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 #
 # Bug#21869656 UNDO LOG DOES NOT CONTAIN ENOUGH INFORMATION
 # ON INDEXED VIRTUAL COLUMNS
@@ -173,4 +171,3 @@ CHECK TABLE t EXTENDED;
 Table	Op	Msg_type	Msg_text
 test.t	check	status	OK
 DROP TABLE t;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/gcol/t/gcol_partition_innodb.test

@@ -30,8 +30,6 @@
 # Set the session storage engine
 --source include/have_innodb.inc
 eval SET @@session.default_storage_engine = 'InnoDB';
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 
 ##### Workarounds for known open engine specific bugs
 #     none
@@ -63,4 +61,3 @@ DROP TABLE t1;
 #------------------------------------------------------------------------------#
 # Cleanup
 --source suite/gcol/inc/gcol_cleanup.inc
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/gcol/t/gcol_purge.test

 --source include/have_innodb.inc
 --source include/have_debug.inc
 
-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
 SET @save_dbug=@@GLOBAL.debug_dbug;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 CREATE TABLE t1(f1 INT NOT NULL, f2 int not null,
 		f3 int generated always as (f2 * 2) VIRTUAL,
 		primary key(f1), INDEX (f3))ENGINE=InnoDB;
@@ -31,6 +29,5 @@ commit;
 disconnect con1;
 disconnect con2;
 connection default;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;
 SET GLOBAL debug_dbug=@save_dbug;
 DROP TABLE t1;

mysql-test/suite/gcol/t/gcol_update.test

 --source include/have_innodb.inc
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 connect (purge_control,localhost,root);
 START TRANSACTION WITH CONSISTENT SNAPSHOT;
 
@@ -63,5 +60,3 @@ disconnect purge_control;
 
 connection default;
 drop table t1;
-
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/gcol/t/innodb_virtual_debug_purge.test

@@ -6,8 +6,6 @@
 set default_storage_engine=innodb;
 set @old_dbug=@@global.debug_dbug;
 # Ensure that the history list length will actually be decremented by purge.
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 SET @saved_stats_persistent = @@GLOBAL.innodb_stats_persistent;
 SET GLOBAL innodb_stats_persistent = OFF;
 
@@ -267,5 +265,4 @@ DROP TABLE t1, t2;
 --source include/wait_until_count_sessions.inc
 set debug_sync=reset;
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;
 SET GLOBAL innodb_stats_persistent = @saved_stats_persistent;

mysql-test/suite/gcol/t/innodb_virtual_index.test

@@ -3,10 +3,6 @@
 
 SET default_storage_engine= innodb;
 
-# Ensure that the history list length will actually be decremented by purge.
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 --echo #
 --echo # Bug 21922176 - PREBUILT->SEARCH_TUPLE CREATED WITHOUT INCLUDING
 --echo # THE NUMBER OF VIRTUAL COLUMNS
@@ -226,7 +222,6 @@ ALTER TABLE t1 ADD COLUMN col7a INT GENERATED ALWAYS AS (col1 % col2)
 VIRTUAL, ADD UNIQUE index idx (col1), algorithm=inplace;
 
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;
 
 --echo #
 --echo # Bug 27122803 - BACKPORT FIX FOR BUG 25899959 TO MYSQL-5.7

mysql-test/suite/gcol/t/innodb_virtual_purge.test

 --source include/have_innodb.inc
 --source include/count_sessions.inc
 
-# Ensure that the history list length will actually be decremented by purge.
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 --echo #
 --echo # Bug#21869656 UNDO LOG DOES NOT CONTAIN ENOUGH INFORMATION
 --echo # ON INDEXED VIRTUAL COLUMNS
@@ -187,4 +183,3 @@ CHECK TABLE t EXTENDED;
 DROP TABLE t;
 
 --source include/wait_until_count_sessions.inc
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/include/wait_all_purged.inc

 # Wait for everything to be purged.
-# The user should have set innodb_purge_rseg_truncate_frequency=1.
 
 --disable_query_log
 if (!$wait_all_purged)

mysql-test/suite/innodb/r/alter_kill.result

@@ -2,7 +2,6 @@
 # Bug#16720368 INNODB CRASHES ON BROKEN #SQL*.IBD FILE AT STARTUP
 #
 SET GLOBAL innodb_file_per_table=1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 CREATE TABLE bug16720368_1 (a INT PRIMARY KEY) ENGINE=InnoDB;
 connect  con1,localhost,root;
 CREATE TABLE bug16720368 (a INT PRIMARY KEY, b INT) ENGINE=InnoDB;

mysql-test/suite/innodb/r/cursor-restore-locking.result

-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,,;
@@ -40,4 +38,3 @@ disconnect con_del_2;
 connection default;
 SET DEBUG_SYNC = 'RESET';
 DROP TABLE t;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_freq;

mysql-test/suite/innodb/r/dml_purge.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 #
 # MDEV-12288 Reset DB_TRX_ID when the history is removed,
 # to speed up MVCC
 #
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TABLE t1(a INT PRIMARY KEY, b INT NOT NULL)
 ROW_FORMAT=REDUNDANT ENGINE=InnoDB;
 InnoDB		0 transactions not purged
@@ -49,4 +46,3 @@ a	b	c
 1	2	NULL
 3	-3	NULL
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/r/foreign_key.result

@@ -165,8 +165,6 @@ ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fail
 ALTER TABLE child FORCE;
 DELETE FROM parent;
 DROP TABLE child,parent;
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 SELECT unique_constraint_name FROM information_schema.referential_constraints
 WHERE table_name = 't2';
 unique_constraint_name
@@ -730,7 +728,6 @@ CHECK TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;
 #
 # MDEV-17187 table doesn't exist in engine after ALTER other tables
 # with CONSTRAINTs
@@ -1034,8 +1031,6 @@ DROP TABLE IF EXISTS t2, t1;
 #
 # MDEV-30531 Corrupt index(es) on busy table when using FOREIGN KEY
 #
-SET @freq=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 CREATE TABLE collections (
 id int(11) unsigned NOT NULL AUTO_INCREMENT,
 collectionhash varchar(255) NOT NULL DEFAULT '0',
@@ -1061,7 +1056,6 @@ CHECK TABLE binaries, collections EXTENDED;
 Table	Op	Msg_type	Msg_text
 test.binaries	check	status	OK
 test.collections	check	status	OK
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@freq;
 disconnect con1;
 DROP TABLE binaries, collections;
 # End of 10.6 tests

mysql-test/suite/innodb/r/gap_lock_split.result

-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 CREATE TABLE t1(id INT PRIMARY key, val VARCHAR(16000))
 ENGINE=InnoDB STATS_PERSISTENT=0;
 INSERT INTO t1 (id,val) SELECT 2*seq,'x' FROM seq_0_to_1023;
@@ -29,4 +27,3 @@ disconnect con1;
 connection default;
 COMMIT;
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;

mysql-test/suite/innodb/r/index_merge_threshold.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TABLE tab(a BIGINT PRIMARY KEY,c1 TINYTEXT,c2 TEXT,c3 MEDIUMTEXT,
 c4 TINYBLOB,c5 BLOB,c6 MEDIUMBLOB,c7 LONGBLOB) ENGINE=InnoDB;
 CREATE INDEX index1 ON tab(c1(255)) COMMENT 'Check index level merge MERGE_THRESHOLD=51';
@@ -1309,4 +1307,3 @@ name	count_reset
 index_page_merge_attempts	2
 index_page_merge_successful	2
 DROP TABLE tab1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/r/innodb-16k.result

@@ -9,9 +9,7 @@ variable_value
 #         Each row format has its own amount of overhead that
 #         varies depending on number of fields and other overhead.
 SET SESSION innodb_strict_mode = ON;
-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
 SET @save_level=@@GLOBAL.innodb_compression_level;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SET GLOBAL innodb_compression_level=1;
 CREATE TABLE t1 (
 c01 char(200), c02 char(200), c03 char(200), c04 char(200), c05 char(200),
@@ -506,7 +504,6 @@ ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=1 CHARSET=ASCII;
 INSERT INTO t1 VALUES(REPEAT('A',512)),(REPEAT('B',512));
 DROP TABLE t1;
 InnoDB		0 transactions not purged
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;
 SET GLOBAL innodb_compression_level=@save_level;
 DROP TABLE t1_purge, t2_purge, t3_purge, t4_purge;
 DROP TABLE tlong;

mysql-test/suite/innodb/r/innodb-32k.result

-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 call mtr.add_suppression("Innodb: Cannot add field.*row size is");
 # Test 1) Show the page size from Information Schema
 SELECT variable_value FROM information_schema.global_status

mysql-test/suite/innodb/r/innodb-system-table-view.result

-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SELECT table_id INTO @table_stats_id FROM information_schema.innodb_sys_tables
 WHERE name = 'mysql/innodb_table_stats';
 SELECT table_id INTO @index_stats_id FROM information_schema.innodb_sys_tables
@@ -168,7 +166,6 @@ name	num_rows	ref_count
 test/parent	1	2
 DROP TABLE child;
 DROP TABLE parent;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;
 #
 # MDEV-29479  I_S.INNODB_SYS_TABLESPACES doesn't have
 #		temporary tablespace information

mysql-test/suite/innodb/r/innodb_bug14147491.result

 # Ensure that purge will not crash on the table after we corrupt it.
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 SET GLOBAL innodb_fast_shutdown=0;
 # Create and populate the table to be corrupted
 set global innodb_file_per_table=ON;

mysql-test/suite/innodb/r/innodb_bug84958.result

@@ -4,8 +4,6 @@
 #
 # Set up the test with a procedure and a function.
 #
-SET @saved_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency= 1;
 CREATE PROCEDURE insert_n(start int, end int)
 BEGIN
 DECLARE i INT DEFAULT start;
@@ -84,7 +82,6 @@ test.t1	check	status	OK
 #
 disconnect con2;
 disconnect con3;
-SET GLOBAL innodb_purge_rseg_truncate_frequency= @saved_frequency;
 DROP TABLE t1;
 DROP PROCEDURE insert_n;
 DROP FUNCTION num_pages_get;

mysql-test/suite/innodb/r/innodb_stats_persistent.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 SET @saved_include_delete_marked = @@GLOBAL.innodb_stats_include_delete_marked;
 SET GLOBAL innodb_stats_include_delete_marked = ON;
 SET @saved_traditional = @@GLOBAL.innodb_stats_traditional;
@@ -105,4 +103,3 @@ DROP TABLE t1,t2;
 SET GLOBAL innodb_stats_include_delete_marked = @saved_include_delete_marked;
 SET GLOBAL innodb_stats_traditional = @saved_traditional;
 SET GLOBAL innodb_stats_modified_counter = @saved_modified_counter;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/r/instant_alter,4k.rdiff

@@ -312,12 +312,11 @@
  connection default;
  InnoDB		0 transactions not purged
  DROP TABLE t1,t2,t3,t4,big;
-@@ -2836,7 +2868,7 @@
+@@ -2836,6 +2868,6 @@
  FROM information_schema.global_status
  WHERE variable_name = 'innodb_instant_alter_column';
  instants
 -209
 +211
- SET GLOBAL innodb_purge_rseg_truncate_frequency= @saved_frequency;
  SET GLOBAL innodb_instant_alter_column_allowed = @saved_allowance;
  #

mysql-test/suite/innodb/r/instant_alter.result

@@ -52,8 +52,6 @@ connect analyze, localhost, root;
 connection default;
 SET timestamp = 42;
 SET time_zone='+03:00';
-SET @saved_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SET @old_instant=
 (SELECT variable_value FROM information_schema.global_status
 WHERE variable_name = 'innodb_instant_alter_column');
@@ -2873,7 +2871,6 @@ FROM information_schema.global_status
 WHERE variable_name = 'innodb_instant_alter_column';
 instants
 209
-SET GLOBAL innodb_purge_rseg_truncate_frequency= @saved_frequency;
 SET GLOBAL innodb_instant_alter_column_allowed = @saved_allowance;
 #
 # MDEV-18266: Changing an index comment unnecessarily rebuilds index

mysql-test/suite/innodb/r/instant_alter_bugs.result

-SET @save_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 #
 # MDEV-17821 Assertion `!page_rec_is_supremum(rec)' failed
 # in btr_pcur_store_position
@@ -208,7 +206,6 @@ DROP TABLE t1;
 # MDEV-23801 Assertion index->table->instant... failed
 #            in btr_pcur_store_position()
 #
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TABLE t (
 pk int auto_increment,
 c01 char(255) not null default repeat('a',255),
@@ -232,7 +229,6 @@ INSERT INTO t () VALUES (),();
 ROLLBACK;
 DELETE FROM t;
 InnoDB		0 transactions not purged
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;
 CREATE TABLE tt ENGINE=InnoDB AS SELECT c FROM t;
 DROP TABLE t, tt;
 # End of 10.3 tests
@@ -489,7 +485,6 @@ ALTER TABLE t1 ADD COLUMN(f2 INT NOT NULL, f3 INT NOT NULL,
 f4 INT NOT NULL, f5 INT NOT NULL),
 CHANGE COLUMN f1 f1 CHAR(10) DEFAULT NULL;
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;
 #
 # MDEV-26420 Buffer overflow on instant ADD/DROP of generated column
 #

mysql-test/suite/innodb/r/instant_alter_crash.result

@@ -20,7 +20,6 @@ COMMIT;
 # Kill the server
 disconnect ddl;
 # restart
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SELECT * FROM t1;
 id	c2
 0	2
@@ -46,8 +45,6 @@ COMMIT;
 # Kill the server
 disconnect ddl;
 # restart
-SET @saved_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SELECT * FROM t1;
 id	c2
 0	3
@@ -76,7 +73,6 @@ COMMIT;
 # Kill the server
 disconnect ddl;
 # restart
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 FOUND 3 /\[Note\] InnoDB: Rolled back recovered transaction / in mysqld.1.err
 SELECT * FROM t1;
 id	c2

mysql-test/suite/innodb/r/instant_alter_debug.result

-SET @save_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SET @old_instant=
 (SELECT variable_value FROM information_schema.global_status
 WHERE variable_name = 'innodb_instant_alter_column');
@@ -523,7 +521,6 @@ test.t1	check	status	OK
 DROP TABLE t1;
 SET DEBUG_SYNC=RESET;
 # End of 10.5 tests
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;
 SELECT variable_value-@old_instant instants
 FROM information_schema.global_status
 WHERE variable_name = 'innodb_instant_alter_column';

mysql-test/suite/innodb/r/instant_alter_purge,release.rdiff

 --- instant_alter_purge.result
 +++ instant_alter_purge,release.result
-@@ -32,16 +32,11 @@
+@@ -32,15 +32,10 @@
  START TRANSACTION WITH CONSISTENT SNAPSHOT;
  connection default;
  DELETE FROM t1;
@@ -16,4 +16,3 @@
  connection default;
 -SET DEBUG_SYNC=RESET;
  DROP TABLE t1;
- SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/r/instant_alter_purge.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 InnoDB		0 transactions not purged
 #
 # MDEV-17793 Crash in purge after instant DROP and emptying the table
@@ -22,4 +20,3 @@ ALTER TABLE t1 DROP extra;
 disconnect prevent_purge;
 InnoDB		0 transactions not purged
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/r/instant_alter_rollback.result

@@ -47,11 +47,8 @@ CREATE TABLE foo(a INT PRIMARY KEY) ENGINE=InnoDB;
 # Kill the server
 disconnect to_be_killed;
 # restart
-SET @saved_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 DROP TABLE foo;
 InnoDB		0 transactions not purged
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@saved_frequency;
 SELECT * FROM empty;
 id	c2	d1
 SELECT * FROM once;

mysql-test/suite/innodb/r/page_id_innochecksum.result

@@ -3,7 +3,6 @@ create table t1(f1 int not null)engine=innodb;
 insert into t1 values(1), (2), (3);
 # Change the page offset
 FOUND 1 /page id mismatch/ in result.log
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 InnoDB		0 transactions not purged
 drop table t1;
 call mtr.add_suppression("InnoDB: Failed to read page 3 from file '.*test/t1\\.ibd': Page read from tablespace is corrupted\\.");

mysql-test/suite/innodb/r/purge.result

-SET @save_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 # Bug #12429576 - Test an assertion failure on purge.
 CREATE TABLE t1_purge (
 A int,
@@ -118,4 +116,3 @@ t12963823	CREATE TABLE `t12963823` (
 ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci ROW_FORMAT=DYNAMIC
 InnoDB		0 transactions not purged
 DROP TABLE t1_purge, t2_purge, t3_purge, t4_purge, t12637786, t12963823;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;

mysql-test/suite/innodb/r/purge_secondary.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TABLE t1 (
 a SERIAL, b CHAR(255) NOT NULL DEFAULT '', c BOOLEAN DEFAULT false,
 l LINESTRING NOT NULL DEFAULT ST_linefromtext('linestring(448 -689,
@@ -169,4 +167,3 @@ page 5: N_RECS=0x0001
 UNLOCK TABLES;
 DROP TABLE t1;
 # End of 10.3 tests
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/r/scrub.result

 SET GLOBAL
 innodb_file_per_table=OFF,
-innodb_purge_rseg_truncate_frequency=1,
 innodb_immediate_scrub_data_uncompressed=ON;
 CREATE TABLE t1(f1 INT NOT NULL, f2 INT NOT NULL,
 f3 INT NOT NULL, INDEX(f1),

mysql-test/suite/innodb/r/scrub_debug.result

 SET @save_debug=@@GLOBAL.INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG;
 SET @save_scrub=@@GLOBAL.INNODB_IMMEDIATE_SCRUB_DATA_UNCOMPRESSED;
-SET @save_freq=@@GLOBAL.INNODB_PURGE_RSEG_TRUNCATE_FREQUENCY;
-SET GLOBAL INNODB_PURGE_RSEG_TRUNCATE_FREQUENCY=1;
 SET GLOBAL INNODB_IMMEDIATE_SCRUB_DATA_UNCOMPRESSED=1;
 SET GLOBAL INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG=2;
 CREATE TABLE t1(f1 INT AUTO_INCREMENT PRIMARY KEY,
@@ -19,4 +17,3 @@ UNLOCK TABLES;
 DROP TABLE t1;
 SET GLOBAL INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG=@save_debug;
 SET GLOBAL INNODB_IMMEDIATE_SCRUB_DATA_UNCOMPRESSED=@save_scrub;
-SET GLOBAL INNODB_PURGE_RSEG_TRUNCATE_FREQUENCY = @save_freq;

mysql-test/suite/innodb/r/truncate_crash.result

@@ -8,10 +8,7 @@ connection default;
 SET DEBUG_SYNC='now WAIT_FOR c';
 # restart
 disconnect wait;
-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 InnoDB		0 transactions not purged
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;
 SELECT COUNT(*) FROM t1;
 COUNT(*)
 0

mysql-test/suite/innodb/r/trx_id_future.result

@@ -2,7 +2,6 @@
 # Bug #20445525	ADD A CONSISTENCY CHECK AGAINST DB_TRX_ID BEING
 #		IN THE FUTURE
 #
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 CREATE TABLE t1(a INT) row_format=redundant engine=innoDB;
 INSERT INTO t1 VALUES(1);
 InnoDB		0 transactions not purged

mysql-test/suite/innodb/r/undo_log.result

@@ -144,8 +144,6 @@ CHECK TABLE test_tab;
 Table	Op	Msg_type	Msg_text
 test.test_tab	check	status	OK
 DROP TABLE test_tab;
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TEMPORARY TABLE t2(i INT)ENGINE=InnoDB;
 CREATE TABLE t1(i TEXT NOT NULL) ENGINE=INNODB;
 BEGIN;
@@ -156,4 +154,3 @@ ROLLBACK;
 InnoDB		0 transactions not purged
 DROP TABLE t1;
 DROP TABLE t2;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/r/undo_space_dblwr.result

@@ -4,7 +4,6 @@ Variable_name	Value
 innodb_doublewrite	ON
 create table t1(f1 int not null, f2 int not null)engine=innodb;
 insert into t1 values (1, 1);
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 InnoDB		0 transactions not purged
 set GLOBAL innodb_log_checkpoint_now=1;
 # Make the first page dirty for undo tablespace

mysql-test/suite/innodb/r/undo_truncate.result

 SET GLOBAL innodb_undo_log_truncate = 0;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 === information_schema.innodb_sys_tablespaces and innodb_sys_datafiles ===
 Space_Name	Page_Size	Zip_Size	Path
 innodb_undo001	DEFAULT	DEFAULT	MYSQLD_DATADIR//undo001
@@ -33,7 +32,6 @@ connection con2;
 commit;
 disconnect con2;
 connection default;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SET GLOBAL innodb_max_purge_lag_wait=0;
 set global innodb_fast_shutdown=0;
 # restart

mysql-test/suite/innodb/r/undo_truncate_recover.result

 SET GLOBAL innodb_undo_log_truncate = 1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 create table t1(keyc int primary key, c char(100)) engine = innodb;
 begin;
 commit;

mysql-test/suite/innodb/t/alter_kill.test

@@ -27,7 +27,6 @@ call mtr.add_suppression("InnoDB: Table `test`\\.`bug16720368` is corrupted");
 -- echo #
 
 SET GLOBAL innodb_file_per_table=1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 
 CREATE TABLE bug16720368_1 (a INT PRIMARY KEY) ENGINE=InnoDB;
 

mysql-test/suite/innodb/t/cursor-restore-locking.test

@@ -3,8 +3,6 @@
 source include/have_debug.inc;
 source include/have_debug_sync.inc;
 
-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;
 
 --source include/wait_all_purged.inc
@@ -86,5 +84,4 @@ INSERT INTO t VALUES(30, 20); # trx_4
 
 SET DEBUG_SYNC = 'RESET';
 DROP TABLE t;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_freq;
 --source include/wait_until_count_sessions.inc

mysql-test/suite/innodb/t/dml_purge.test

@@ -2,16 +2,12 @@
 
 let INNODB_PAGE_SIZE=`select @@innodb_page_size`;
 let MYSQLD_DATADIR=`select @@datadir`;
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 
 --echo #
 --echo # MDEV-12288 Reset DB_TRX_ID when the history is removed,
 --echo # to speed up MVCC
 --echo #
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 CREATE TABLE t1(a INT PRIMARY KEY, b INT NOT NULL)
 ROW_FORMAT=REDUNDANT ENGINE=InnoDB;
 --source include/wait_all_purged.inc
@@ -80,4 +76,3 @@ EOF
 UNLOCK TABLES;
 SELECT * FROM t1;
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/t/foreign_key.test

@@ -138,9 +138,6 @@ ALTER TABLE child FORCE;
 DELETE FROM parent;
 DROP TABLE child,parent;
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 SELECT unique_constraint_name FROM information_schema.referential_constraints
 WHERE table_name = 't2';
 
@@ -737,7 +734,6 @@ disconnect con1;
 --source include/wait_all_purged.inc
 CHECK TABLE t1;
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;
 
 --echo #
 --echo # MDEV-17187 table doesn't exist in engine after ALTER other tables
@@ -1080,9 +1076,6 @@ DROP TABLE IF EXISTS t2, t1;
 --echo # MDEV-30531 Corrupt index(es) on busy table when using FOREIGN KEY
 --echo #
 
-SET @freq=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
-
 CREATE TABLE collections (
   id int(11) unsigned NOT NULL AUTO_INCREMENT,
   collectionhash varchar(255) NOT NULL DEFAULT '0',
@@ -1111,7 +1104,6 @@ REPLACE INTO binaries (id) VALUES (NULL);
 
 SET GLOBAL innodb_max_purge_lag_wait=0;
 CHECK TABLE binaries, collections EXTENDED;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@freq;
 
 --disconnect con1
 

mysql-test/suite/innodb/t/gap_lock_split.test

@@ -3,9 +3,6 @@
 --source include/have_debug.inc
 --source include/have_debug_sync.inc
 
-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
-
 CREATE TABLE t1(id INT PRIMARY key, val VARCHAR(16000))
   ENGINE=InnoDB STATS_PERSISTENT=0;
 INSERT INTO t1 (id,val) SELECT 2*seq,'x' FROM seq_0_to_1023;
@@ -44,4 +41,3 @@ disconnect con1;
 connection default;
 COMMIT;
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;

mysql-test/suite/innodb/t/index_merge_threshold.test

@@ -13,9 +13,6 @@
 --source include/have_innodb_16k.inc
 --source include/have_partition.inc
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 # Check index merge threshold by create index on all datatypes
 
 CREATE TABLE tab(a BIGINT PRIMARY KEY,c1 TINYTEXT,c2 TEXT,c3 MEDIUMTEXT,
@@ -189,4 +186,3 @@ CREATE INDEX index1 ON tab1(b(750)) COMMENT 'MERGE_THRESHOLD=45';
 --source suite/innodb/include/innodb_merge_threshold_secondary.inc
 
 DROP TABLE tab1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/t/innodb-16k.test

@@ -16,9 +16,7 @@ SELECT variable_value FROM information_schema.global_status
 --echo #         varies depending on number of fields and other overhead.
 
 SET SESSION innodb_strict_mode = ON;
-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
 SET @save_level=@@GLOBAL.innodb_compression_level;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SET GLOBAL innodb_compression_level=1;
 
 # Compressed table: compressBound() for the s390x DFLTCC instruction
@@ -458,7 +456,6 @@ DROP TABLE t1;
 
 --source include/wait_all_purged.inc
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;
 SET GLOBAL innodb_compression_level=@save_level;
 
 DROP TABLE t1_purge, t2_purge, t3_purge, t4_purge;

mysql-test/suite/innodb/t/innodb-32k.test

@@ -3,8 +3,6 @@
 --source include/have_innodb.inc
 --source include/have_innodb_32k.inc
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
-
 call mtr.add_suppression("Innodb: Cannot add field.*row size is");
 
 let $MYSQLD_DATADIR= `select @@datadir`;

mysql-test/suite/innodb/t/innodb-system-table-view.test

@@ -4,8 +4,6 @@
 
 --source include/innodb_page_size_small.inc
 
-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 LET $MYSQLD_DATADIR = `select @@datadir`;
 LET $INNODB_PAGE_SIZE = `select @@innodb_page_size`;
 
@@ -140,7 +138,6 @@ WHERE name LIKE "%parent";
 DROP TABLE child;
 
 DROP TABLE parent;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;
 
 --echo #
 --echo # MDEV-29479  I_S.INNODB_SYS_TABLESPACES doesn't have

mysql-test/suite/innodb/t/innodb_bug14147491.test

@@ -16,7 +16,6 @@ call mtr.add_suppression("InnoDB: File '.*test/t1\\.ibd' is corrupted");
 --enable_query_log
 
 --echo # Ensure that purge will not crash on the table after we corrupt it.
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 SET GLOBAL innodb_fast_shutdown=0;
 
 --echo # Create and populate the table to be corrupted

mysql-test/suite/innodb/t/innodb_bug84958.test

@@ -6,8 +6,6 @@
 --echo #
 
 --source include/have_innodb.inc
-SET @saved_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency= 1;
 
 DELIMITER ~~;
 CREATE PROCEDURE insert_n(start int, end int)
@@ -90,7 +88,6 @@ CHECK TABLE t1;
 --echo #
 disconnect con2;
 disconnect con3;
-SET GLOBAL innodb_purge_rseg_truncate_frequency= @saved_frequency;
 DROP TABLE t1;
 DROP PROCEDURE insert_n;
 DROP FUNCTION num_pages_get;

mysql-test/suite/innodb/t/innodb_stats_persistent.test

 --source include/have_innodb.inc
 --source include/have_sequence.inc
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 SET @saved_include_delete_marked = @@GLOBAL.innodb_stats_include_delete_marked;
 SET GLOBAL innodb_stats_include_delete_marked = ON;
 SET @saved_traditional = @@GLOBAL.innodb_stats_traditional;
@@ -84,4 +82,3 @@ DROP TABLE t1,t2;
 SET GLOBAL innodb_stats_include_delete_marked = @saved_include_delete_marked;
 SET GLOBAL innodb_stats_traditional = @saved_traditional;
 SET GLOBAL innodb_stats_modified_counter = @saved_modified_counter;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/t/instant_alter.test

@@ -44,8 +44,6 @@ connect analyze, localhost, root;
 connection default;
 SET timestamp = 42;
 SET time_zone='+03:00';
-SET @saved_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 
 SET @old_instant=
 (SELECT variable_value FROM information_schema.global_status
@@ -906,7 +904,6 @@ DROP TABLE t1;
 SELECT variable_value-@old_instant instants
 FROM information_schema.global_status
 WHERE variable_name = 'innodb_instant_alter_column';
-SET GLOBAL innodb_purge_rseg_truncate_frequency= @saved_frequency;
 SET GLOBAL innodb_instant_alter_column_allowed = @saved_allowance;
 
 --echo #

mysql-test/suite/innodb/t/instant_alter_bugs.test

 --source include/have_innodb.inc
 
-SET @save_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
-
 --echo #
 --echo # MDEV-17821 Assertion `!page_rec_is_supremum(rec)' failed
 --echo # in btr_pcur_store_position
@@ -217,8 +214,6 @@ DROP TABLE t1;
 --echo #            in btr_pcur_store_position()
 --echo #
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 CREATE TABLE t (
   pk int auto_increment,
   c01 char(255) not null default repeat('a',255),
@@ -245,7 +240,6 @@ ROLLBACK;
 DELETE FROM t;
 
 --source include/wait_all_purged.inc
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;
 
 CREATE TABLE tt ENGINE=InnoDB AS SELECT c FROM t;
 DROP TABLE t, tt;
@@ -524,7 +518,6 @@ ALTER TABLE t1 ADD COLUMN(f2 INT NOT NULL, f3 INT NOT NULL,
 			  f4 INT NOT NULL, f5 INT NOT NULL),
 	       CHANGE COLUMN f1 f1 CHAR(10) DEFAULT NULL;
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;
 
 --echo #
 --echo # MDEV-26420 Buffer overflow on instant ADD/DROP of generated column

mysql-test/suite/innodb/t/instant_alter_crash.test

@@ -36,7 +36,6 @@ COMMIT;
 disconnect ddl;
 --source include/start_mysqld.inc
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SELECT * FROM t1;
 SELECT * FROM t2;
 BEGIN;
@@ -64,9 +63,6 @@ COMMIT;
 disconnect ddl;
 --source include/start_mysqld.inc
 
-SET @saved_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
-
 SELECT * FROM t1;
 SELECT * FROM t2;
 BEGIN;
@@ -94,8 +90,6 @@ COMMIT;
 disconnect ddl;
 --source include/start_mysqld.inc
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
-
 let SEARCH_FILE= $MYSQLTEST_VARDIR/log/mysqld.1.err;
 let SEARCH_PATTERN= \[Note\] InnoDB: Rolled back recovered transaction ;
 -- source include/search_pattern_in_file.inc

mysql-test/suite/innodb/t/instant_alter_debug.test

@@ -3,9 +3,6 @@
 --source include/have_debug_sync.inc
 --source include/have_sequence.inc
 
-SET @save_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
-
 SET @old_instant=
 (SELECT variable_value FROM information_schema.global_status
 WHERE variable_name = 'innodb_instant_alter_column');
@@ -607,8 +604,6 @@ SET DEBUG_SYNC=RESET;
 
 --echo # End of 10.5 tests
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @save_frequency;
-
 SELECT variable_value-@old_instant instants
 FROM information_schema.global_status
 WHERE variable_name = 'innodb_instant_alter_column';

mysql-test/suite/innodb/t/instant_alter_purge.test

@@ -4,8 +4,6 @@ if ($have_debug) {
 --source include/have_debug_sync.inc
 }
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 --source include/wait_all_purged.inc
 
 --echo #
@@ -34,4 +32,3 @@ disconnect prevent_purge;
 let $wait_all_purged= 0;
 --source include/wait_all_purged.inc
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/t/instant_alter_rollback.test

@@ -60,11 +60,8 @@ CREATE TABLE foo(a INT PRIMARY KEY) ENGINE=InnoDB;
 disconnect to_be_killed;
 --source include/start_mysqld.inc
 
-SET @saved_frequency= @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 DROP TABLE foo;
 --source include/wait_all_purged.inc
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@saved_frequency;
 
 SELECT * FROM empty;
 SELECT * FROM once;

mysql-test/suite/innodb/t/page_id_innochecksum.test

@@ -63,7 +63,6 @@ let SEARCH_PATTERN=page id mismatch;
 --remove_file $resultlog
 let $restart_parameters=--innodb-force-recovery=1;
 --source include/start_mysqld.inc
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 --source include/wait_all_purged.inc
 drop table t1;
 call mtr.add_suppression("InnoDB: Failed to read page 3 from file '.*test/t1\\.ibd': Page read from tablespace is corrupted\\.");

mysql-test/suite/innodb/t/purge.test

 --source include/have_innodb.inc
 --source include/have_innodb_16k.inc
 
-SET @save_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
-
 --echo # Bug #12429576 - Test an assertion failure on purge.
 CREATE TABLE t1_purge (
 A int,
@@ -114,4 +111,3 @@ SHOW CREATE TABLE t12963823;
 
 -- source include/wait_all_purged.inc
 DROP TABLE t1_purge, t2_purge, t3_purge, t4_purge, t12637786, t12963823;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;

mysql-test/suite/innodb/t/purge_secondary.test

@@ -5,10 +5,6 @@
 call mtr.add_suppression("InnoDB: Difficult to find free blocks in the buffer pool");
 --enable_query_log
 
-# Ensure that the history list length will actually be decremented by purge.
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 CREATE TABLE t1 (
   a SERIAL, b CHAR(255) NOT NULL DEFAULT '', c BOOLEAN DEFAULT false,
   l LINESTRING NOT NULL DEFAULT ST_linefromtext('linestring(448 -689,
@@ -174,5 +170,3 @@ UNLOCK TABLES;
 DROP TABLE t1;
 
 --echo # End of 10.3 tests
-
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/t/scrub.test

@@ -4,7 +4,6 @@
 
 SET GLOBAL
   innodb_file_per_table=OFF,
-  innodb_purge_rseg_truncate_frequency=1,
   innodb_immediate_scrub_data_uncompressed=ON;
 CREATE TABLE t1(f1 INT NOT NULL, f2 INT NOT NULL,
                 f3 INT NOT NULL, INDEX(f1),

mysql-test/suite/innodb/t/scrub_debug.test

@@ -4,9 +4,7 @@
 
 SET @save_debug=@@GLOBAL.INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG;
 SET @save_scrub=@@GLOBAL.INNODB_IMMEDIATE_SCRUB_DATA_UNCOMPRESSED;
-SET @save_freq=@@GLOBAL.INNODB_PURGE_RSEG_TRUNCATE_FREQUENCY;
 
-SET GLOBAL INNODB_PURGE_RSEG_TRUNCATE_FREQUENCY=1;
 SET GLOBAL INNODB_IMMEDIATE_SCRUB_DATA_UNCOMPRESSED=1;
 SET GLOBAL INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG=2;
 let $MYSQLD_DATADIR=`select @@datadir`;
@@ -28,4 +26,3 @@ UNLOCK TABLES;
 DROP TABLE t1;
 SET GLOBAL INNODB_LIMIT_OPTIMISTIC_INSERT_DEBUG=@save_debug;
 SET GLOBAL INNODB_IMMEDIATE_SCRUB_DATA_UNCOMPRESSED=@save_scrub;
-SET GLOBAL INNODB_PURGE_RSEG_TRUNCATE_FREQUENCY = @save_freq;

mysql-test/suite/innodb/t/table_flags.test

@@ -34,7 +34,6 @@ let bugdir= $MYSQLTEST_VARDIR/tmp/table_flags;
 --let $d=--innodb-data-home-dir=$bugdir --innodb-log-group-home-dir=$bugdir
 --let $d=$d --innodb-data-file-path=ibdata1:1M:autoextend
 --let $d=$d --innodb-undo-tablespaces=0
---let $d=$d --innodb-purge-rseg-truncate-frequency=1
 --let $d=$d --skip-innodb-fast-shutdown
 --let $restart_noprint=1
 --let $restart_parameters=$d --innodb-stats-persistent=0

mysql-test/suite/innodb/t/truncate_crash.test

@@ -17,10 +17,7 @@ SET DEBUG_SYNC='now WAIT_FOR c';
 --source include/restart_mysqld.inc
 disconnect wait;
 
-SET @save_frequency=@@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 --source include/wait_all_purged.inc
-SET GLOBAL innodb_purge_rseg_truncate_frequency=@save_frequency;
 
 --replace_result 2 0
 SELECT COUNT(*) FROM t1;

mysql-test/suite/innodb/t/trx_id_future.test

@@ -6,7 +6,6 @@
 --source include/have_innodb.inc
 --source include/not_embedded.inc
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 let PAGE_SIZE=`select @@innodb_page_size`;
 
 CREATE TABLE t1(a INT) row_format=redundant engine=innoDB;

mysql-test/suite/innodb/t/undo_log.test

@@ -141,8 +141,6 @@ SELECT COUNT(*) FROM test_tab;
 CHECK TABLE test_tab;
 DROP TABLE test_tab;
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TEMPORARY TABLE t2(i INT)ENGINE=InnoDB;
 CREATE TABLE t1(i TEXT NOT NULL) ENGINE=INNODB;
 BEGIN;
@@ -153,4 +151,3 @@ ROLLBACK;
 --source include/wait_all_purged.inc
 DROP TABLE t1;
 DROP TABLE t2;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb/t/undo_space_dblwr.test

@@ -9,7 +9,6 @@ show variables like 'innodb_doublewrite';
 create table t1(f1 int not null, f2 int not null)engine=innodb;
 insert into t1 values (1, 1);
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 --source include/wait_all_purged.inc
 
 set GLOBAL innodb_log_checkpoint_now=1;

mysql-test/suite/innodb/t/undo_truncate.test

@@ -13,7 +13,6 @@ call mtr.add_suppression("InnoDB: Trying to delete tablespace.*pending operation
 --enable_query_log
 
 SET GLOBAL innodb_undo_log_truncate = 0;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 
 LET $MYSQLD_DATADIR = `select @@datadir`;
 LET $INNODB_PAGE_SIZE = `select @@innodb_page_size`;
@@ -53,7 +52,6 @@ connection default;
 let $trx_before= `SHOW ENGINE INNODB STATUS`;
 let $trx_before= `select substr('$trx_before',9)+2`;
 
-SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
 SET GLOBAL innodb_max_purge_lag_wait=0;
 set global innodb_fast_shutdown=0;
 --source include/restart_mysqld.inc

mysql-test/suite/innodb/t/undo_truncate_recover.test

@@ -13,7 +13,6 @@
 --source include/not_embedded.inc
 
 SET GLOBAL innodb_undo_log_truncate = 1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 
 let SEARCH_FILE = $MYSQLTEST_VARDIR/log/mysqld.1.err;
 

mysql-test/suite/innodb_fts/r/crash_recovery.result

@@ -33,10 +33,7 @@ connection default;
 disconnect ddl1;
 disconnect ddl2;
 disconnect ddl3;
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 InnoDB		0 transactions not purged
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;
 CHECK TABLE t1,t2,t3;
 Table	Op	Msg_type	Msg_text
 test.t1	check	status	OK

mysql-test/suite/innodb_fts/t/crash_recovery.test

@@ -111,13 +111,9 @@ disconnect ddl1;
 disconnect ddl2;
 disconnect ddl3;
 
-# Ensure that the history list length will actually be decremented by purge.
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 # Wait for purge, so that any #sql-ib.ibd files from the previous kill
 # will be deleted.
 source ../../innodb/include/wait_all_purged.inc;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;
 
 CHECK TABLE t1,t2,t3;
 DROP TABLE t1,t2,t3;

mysql-test/suite/innodb_gis/r/rtree_add_index.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TABLE t1 (g MULTIPOINT NOT NULL) ENGINE=InnoDB;
 INSERT INTO t1 VALUES ('');
 connect purge_control,localhost,root;
@@ -10,4 +8,3 @@ ALTER TABLE t1 ADD SPATIAL INDEX (g);
 disconnect purge_control;
 InnoDB		0 transactions not purged
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb_gis/r/rtree_compress.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 create table t1 (c1 int, c2 geometry not null, spatial index (c2))engine=innodb ROW_FORMAT=COMPRESSED;
 insert into t1 values(1, Point(1,1));
 insert into t1 values(2, Point(2,2));
@@ -51,4 +49,3 @@ count(*)
 SET debug_dbug = @saved_dbug;
 InnoDB		0 transactions not purged
 drop table t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb_gis/r/rtree_purge.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 create table t (
 b point not null,d point not null, spatial key (d),spatial key (b)
 ) engine=innodb;
 InnoDB		0 transactions not purged
 drop table t;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb_gis/r/rtree_undo.result

-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 connect  control_purge,localhost,root,,;
 connection default;
 CREATE TABLE t1 (
@@ -136,4 +134,3 @@ SPATIAL KEY (g6)
 ) ENGINE=InnoDB;
 DROP TABLE t1,t2;
 disconnect control_purge;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb_gis/t/rtree_add_index.test

 --source include/have_innodb.inc
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 CREATE TABLE t1 (g MULTIPOINT NOT NULL) ENGINE=InnoDB;
 INSERT INTO t1 VALUES ('');
 
@@ -17,4 +14,3 @@ ALTER TABLE t1 ADD SPATIAL INDEX (g);
 disconnect purge_control;
 --source ../../innodb/include/wait_all_purged.inc
 DROP TABLE t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb_gis/t/rtree_compress.test

@@ -10,9 +10,6 @@
 # Valgrind takes too much time on PB2 even in the --big-test runs.
 --source include/not_valgrind.inc
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 create table t1 (c1 int, c2 geometry not null, spatial index (c2))engine=innodb ROW_FORMAT=COMPRESSED;
 
 # Insert enough values to let R-tree split.
@@ -61,4 +58,3 @@ SET debug_dbug = @saved_dbug;
 
 # Clean up.
 drop table t1;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb_gis/t/rtree_purge.test

@@ -6,9 +6,6 @@
 # This test often times out with MSAN
 --source include/not_msan.inc
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 create table t (
   b point not null,d point not null, spatial key (d),spatial key (b)
 ) engine=innodb;
@@ -29,4 +26,3 @@ dec $n;
 
 # Clean up.
 drop table t;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb_gis/t/rtree_undo.test

@@ -6,9 +6,6 @@
 --source include/innodb_row_format.inc
 --source include/count_sessions.inc
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 connect (control_purge,localhost,root,,);
 connection default;
 
@@ -100,5 +97,3 @@ dec $index;
 
 disconnect control_purge;
 --source include/wait_until_count_sessions.inc
-
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb_zip/r/blob.result

@@ -2,8 +2,6 @@
 # MDEV-21259 Assertion 'w != NORMAL || mach_read_from_4(ptr) != val'
 # failed in mtr_t::write(), btr_free_externally_stored_field()
 #
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TABLE t1 (c TEXT, f2 INT PRIMARY KEY, f3 INT UNIQUE)
 ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4;
 SET @level= @@GLOBAL.innodb_compression_level;
@@ -18,4 +16,3 @@ disconnect prevent_purge;
 InnoDB		0 transactions not purged
 DROP TABLE t1;
 SET GLOBAL innodb_compression_level = @level;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/innodb_zip/t/blob.test

@@ -5,9 +5,6 @@
 --echo # failed in mtr_t::write(), btr_free_externally_stored_field()
 --echo #
 
-SET @saved_frequency = @@GLOBAL.innodb_purge_rseg_truncate_frequency;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
-
 CREATE TABLE t1 (c TEXT, f2 INT PRIMARY KEY, f3 INT UNIQUE)
 ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4;
 
@@ -26,4 +23,3 @@ REPLACE INTO t1 SELECT * FROM t1;
 
 DROP TABLE t1;
 SET GLOBAL innodb_compression_level = @level;
-SET GLOBAL innodb_purge_rseg_truncate_frequency = @saved_frequency;

mysql-test/suite/mariabackup/unencrypted_page_compressed.result

 call mtr.add_suppression("InnoDB: Table `test`.`t1` has an unreadable root page");
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY, b TEXT, c char(200)) ENGINE=InnoDB page_compressed=yes;
 insert into t1(b, c) values("mariadb", "mariabackup");
 InnoDB		0 transactions not purged

mysql-test/suite/mariabackup/unencrypted_page_compressed.test

 call mtr.add_suppression("InnoDB: Table `test`.`t1` has an unreadable root page");
-SET GLOBAL innodb_purge_rseg_truncate_frequency = 1;
 CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY, b TEXT, c char(200)) ENGINE=InnoDB page_compressed=yes;
 insert into t1(b, c) values("mariadb", "mariabackup");
 --source ../innodb/include/wait_all_purged.inc

mysql-test/suite/sys_vars/r/innodb_purge_rseg_truncate_frequency_basic.result

@@ -4,7 +4,11 @@ SELECT @global_start_value;
 128
 '#--------------------FN_DYNVARS_046_01------------------------#'
 SET @@global.innodb_purge_rseg_truncate_frequency = 1;
+Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 SET @@global.innodb_purge_rseg_truncate_frequency = DEFAULT;
+Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
 128
@@ -17,31 +21,41 @@ SELECT @@innodb_purge_rseg_truncate_frequency;
 SELECT local.innodb_purge_rseg_truncate_frequency;
 ERROR 42S02: Unknown table 'local' in field list
 SET global innodb_purge_rseg_truncate_frequency = 1;
+Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
 1
 '#--------------------FN_DYNVARS_046_03------------------------#'
 SET @@global.innodb_purge_rseg_truncate_frequency = 1;
+Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
 1
 SET @@global.innodb_purge_rseg_truncate_frequency = 1;
+Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
 1
 SET @@global.innodb_purge_rseg_truncate_frequency = 128;
+Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
 128
 '#--------------------FN_DYNVARS_046_05-------------------------#'
 SET @@global.innodb_purge_rseg_truncate_frequency = -1;
 Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 Warning	1292	Truncated incorrect innodb_purge_rseg_truncate_fr... value: '-1'
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
 1
 SET @@global.innodb_purge_rseg_truncate_frequency = -1024;
 Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 Warning	1292	Truncated incorrect innodb_purge_rseg_truncate_fr... value: '-1024'
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
@@ -98,16 +112,21 @@ SELECT @@global.innodb_purge_rseg_truncate_frequency;
 1
 '#---------------------FN_DYNVARS_046_08----------------------#'
 SET @@global.innodb_purge_rseg_truncate_frequency = TRUE;
+Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
 1
 SET @@global.innodb_purge_rseg_truncate_frequency = FALSE;
 Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 Warning	1292	Truncated incorrect innodb_purge_rseg_truncate_fr... value: '0'
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
 1
 SET @@global.innodb_purge_rseg_truncate_frequency = @global_start_value;
+Warnings:
+Warning	1287	'@@innodb_purge_rseg_truncate_frequency' is deprecated and will be removed in a future release
 SELECT @@global.innodb_purge_rseg_truncate_frequency;
 @@global.innodb_purge_rseg_truncate_frequency
 128

mysql-test/suite/sys_vars/r/sysvars_innodb,32bit.rdiff

@@ -320,7 +320,7 @@
  VARIABLE_SCOPE	GLOBAL
 -VARIABLE_TYPE	BIGINT UNSIGNED
 +VARIABLE_TYPE	INT UNSIGNED
- VARIABLE_COMMENT	Dictates rate at which UNDO records are purged. Value N means purge rollback segment(s) on every Nth iteration of purge invocation
+ VARIABLE_COMMENT	Deprecated parameter with no effect
  NUMERIC_MIN_VALUE	1
  NUMERIC_MAX_VALUE	128
 @@ -1393,7 +1393,7 @@

mysql-test/suite/sys_vars/r/sysvars_innodb.result

@@ -1308,7 +1308,7 @@ SESSION_VALUE	NULL
 DEFAULT_VALUE	128
 VARIABLE_SCOPE	GLOBAL
 VARIABLE_TYPE	BIGINT UNSIGNED
-VARIABLE_COMMENT	Dictates rate at which UNDO records are purged. Value N means purge rollback segment(s) on every Nth iteration of purge invocation
+VARIABLE_COMMENT	Deprecated parameter with no effect
 NUMERIC_MIN_VALUE	1
 NUMERIC_MAX_VALUE	128
 NUMERIC_BLOCK_SIZE	0