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SET PERSIST innodb_extend_and_initialize=FALSE;
SELECT @@GLOBAL.innodb_extend_and_initialize;
@@GLOBAL.innodb_extend_and_initialize
0
# Scenario-1: posix_fallocate returns errors EINTR
# or EINVAL
DROP TABLE IF EXISTS ttext1;
Warnings:
Note 1051 Unknown table 'test.ttext1'
CREATE TABLE ttext1(c1 INT, c2 TEXT);
INSERT INTO ttext1 VALUES(1, REPEAT('abcdef', 10000));
INSERT INTO ttext1 VALUES(2, REPEAT('abcdef', 10000));
INSERT INTO ttext1 VALUES(3, REPEAT('abcdef', 10000));
SET SESSION debug='+d,ib_posix_fallocate_fail_eintr';
INSERT INTO ttext1 VALUES(4, REPEAT('abcdef', 10000));
SELECT COUNT(*) FROM ttext1;
COUNT(*)
4
DROP TABLE ttext1;
SET SESSION debug='-d,ib_posix_fallocate_fail_eintr';
# Scenario-2: Server crashed while creating a table
# just after writing the redo log record for space
# extension
DROP TABLE IF EXISTS t1;
Warnings:
Note 1051 Unknown table 'test.t1'
SET SESSION debug='+d,ib_crash_after_writing_redo_extend_1';
CREATE TABLE t1(a char(1), b char(1), key(a, b)) ENGINE=innodb;
# Restart after the crash
INSERT INTO t1 VALUES('a','b');
ERROR 42S02: Table 'test.t1' doesn't exist
# Scenario-3: Server crashed after writing the redo log
# but before the transaction could commit
CREATE TABLE ttext1(c1 INT, c2 TEXT);
INSERT INTO ttext1 VALUES(1, REPEAT('abcdef',10000));
INSERT INTO ttext1 VALUES(2, REPEAT('abcdef',10000));
INSERT INTO ttext1 VALUES(3, REPEAT('abcdef',10000));
SET SESSION debug='+d,ib_crash_after_writing_redo_extend_1';
INSERT INTO ttext1 VALUES(4, REPEAT('abcdef',10000));
# Restart after the crash
SELECT COUNT(*) FROM ttext1;
COUNT(*)
3
INSERT INTO ttext1 VALUES(5, REPEAT('abcdef',10000));
INSERT INTO ttext1 VALUES(6, REPEAT('abcdef',10000));
SELECT COUNT(*) FROM ttext1;
COUNT(*)
5
DROP TABLE ttext1;
SET PERSIST innodb_extend_and_initialize=DEFAULT;
SELECT @@GLOBAL.innodb_extend_and_initialize;
@@GLOBAL.innodb_extend_and_initialize
1
# Scenario-4: Server crashes before the checkpoint
SET @@GLOBAL.INNODB_CHECKPOINT_DISABLED='ON';
DROP TABLE IF EXISTS ttext;
Warnings:
Note 1051 Unknown table 'test.ttext'
CREATE TABLE ttext(c1 INT, c2 TEXT);
INSERT INTO ttext VALUES(1, REPEAT('abcdef',10000));
INSERT INTO ttext VALUES(2, REPEAT('abcdef',10000));
INSERT INTO ttext VALUES(3, REPEAT('abcdef',10000));
INSERT INTO ttext VALUES(4, REPEAT('abcdef',10000));
SELECT COUNT(*) FROM ttext;
COUNT(*)
4
# Kill and restart
SELECT @@GLOBAL.INNODB_CHECKPOINT_DISABLED;
@@GLOBAL.INNODB_CHECKPOINT_DISABLED
0
SELECT @@GLOBAL.innodb_extend_and_initialize;
@@GLOBAL.innodb_extend_and_initialize
1
SELECT COUNT(*) FROM ttext;
COUNT(*)
4
DROP TABLE ttext;
SET PERSIST innodb_extend_and_initialize=DEFAULT;
SELECT @@GLOBAL.innodb_extend_and_initialize;
@@GLOBAL.innodb_extend_and_initialize
1
# Scenario-5: Server crasheѕ before checkpoint
# and restarted with innodb_extend_and_initialize=off
SET @@GLOBAL.innodb_extend_and_initialize='OFF';
SELECT @@GLOBAL.innodb_extend_and_initialize;
@@GLOBAL.innodb_extend_and_initialize
0
SET @@GLOBAL.INNODB_CHECKPOINT_DISABLED='ON';
CREATE TABLE ttext(c1 INT, c2 TEXT);
INSERT INTO ttext VALUES(1, REPEAT('abcdef',10000));
INSERT INTO ttext VALUES(2, REPEAT('abcdef',10000));
INSERT INTO ttext VALUES(3, REPEAT('abcdef',10000));
INSERT INTO ttext VALUES(4, REPEAT('abcdef',10000));
SELECT COUNT(*) FROM ttext;
COUNT(*)
4
# Kill and restart
SELECT @@GLOBAL.INNODB_CHECKPOINT_DISABLED;
@@GLOBAL.INNODB_CHECKPOINT_DISABLED
0
SELECT @@GLOBAL.innodb_extend_and_initialize;
@@GLOBAL.innodb_extend_and_initialize
1
SELECT COUNT(*) FROM ttext;
COUNT(*)
4
DROP TABLE ttext;
RESET PERSIST;
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