1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
FLUSH TABLES;
CREATE TABLE t1 (a INT PRIMARY KEY, b TEXT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=InnoDB;
CREATE TABLE t3 (a INT PRIMARY KEY, b TEXT, c TEXT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1,REPEAT('a',30000)),(2,REPEAT('b',40000));
SET DEBUG_SYNC='before_row_upd_extern SIGNAL have_latch WAIT_FOR go1';
BEGIN;
UPDATE t1 SET a=a+2;
ROLLBACK;
BEGIN;
UPDATE t1 SET b=CONCAT(b,'foo');
connect con1,localhost,root,,;
SET DEBUG_SYNC='now WAIT_FOR have_latch';
SELECT a, RIGHT(b,20) FROM t1;
connect con2,localhost,root,,;
SET DEBUG_SYNC='now SIGNAL go1';
connection con1;
a RIGHT(b,20)
1 aaaaaaaaaaaaaaaaaaaa
2 bbbbbbbbbbbbbbbbbbbb
connection default;
SET DEBUG='+d,row_ins_extern_checkpoint';
Warnings:
Warning 1287 '@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead
SET DEBUG_SYNC='before_row_ins_extern_latch SIGNAL rec_not_blob WAIT_FOR crash';
ROLLBACK;
BEGIN;
INSERT INTO t1 VALUES (3,REPEAT('c',50000));
connection con1;
SET DEBUG_SYNC='now WAIT_FOR rec_not_blob';
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT @@transaction_isolation;
@@transaction_isolation
READ-UNCOMMITTED
SELECT a, RIGHT(b,20) FROM t1;
a RIGHT(b,20)
1 aaaaaaaaaaaaaaaaaaaa
2 bbbbbbbbbbbbbbbbbbbb
SELECT a FROM t1;
a
1
2
3
BEGIN;
INSERT INTO t2 VALUES (42);
# restart
disconnect con1;
disconnect con2;
connection default;
ERROR HY000: Lost connection to server during query
CHECK TABLE t1;
Table Op Msg_type Msg_text
test.t1 check status OK
INSERT INTO t3 VALUES
(1,REPEAT('d',7000),REPEAT('e',100)),
(2,REPEAT('g',7000),REPEAT('h',100));
SET DEBUG_SYNC='blob_write_middle SIGNAL go_sel WAIT_FOR go_upd';
UPDATE t3 SET c=REPEAT('f',3000) WHERE a=1;
# Connection con1:
connect con1,localhost,root,,;
SET DEBUG_SYNC='now WAIT_FOR go_sel';
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT @@transaction_isolation;
@@transaction_isolation
READ-UNCOMMITTED
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
a RIGHT(b,20) RIGHT(c,20)
2 gggggggggggggggggggg hhhhhhhhhhhhhhhhhhhh
set debug_sync='now SIGNAL go_upd';
# Connection default:
connection default;
# reap UPDATE t3 SET c=REPEAT('f',3000) WHERE a=1;
# Connection con1:
connection con1;
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
a RIGHT(b,20) RIGHT(c,20)
1 dddddddddddddddddddd ffffffffffffffffffff
2 gggggggggggggggggggg hhhhhhhhhhhhhhhhhhhh
disconnect con1;
connection default;
CHECK TABLE t1,t2,t3;
Table Op Msg_type Msg_text
test.t1 check status OK
test.t2 check status OK
test.t3 check status OK
connect con2,localhost,root,,;
BEGIN;
INSERT INTO t2 VALUES (347);
connection default;
SET DEBUG='+d,row_upd_extern_checkpoint';
Warnings:
Warning 1287 '@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead
SET DEBUG_SYNC='before_row_upd_extern SIGNAL have_latch WAIT_FOR crash';
UPDATE t3 SET c=REPEAT('i',3000) WHERE a=2;
connection con2;
SET DEBUG_SYNC='now WAIT_FOR have_latch';
SELECT info FROM information_schema.processlist
WHERE state = 'debug sync point: before_row_upd_extern';
info
UPDATE t3 SET c=REPEAT('i',3000) WHERE a=2
connect con3,localhost,root,,;
SET GLOBAL innodb_flush_log_at_trx_commit=1;
DELETE FROM t1;
ROLLBACK;
disconnect con3;
connection con2;
# restart
disconnect con2;
connection default;
ERROR HY000: Lost connection to server during query
CHECK TABLE t1,t2,t3;
Table Op Msg_type Msg_text
test.t1 check status OK
test.t2 check status OK
test.t3 check status OK
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
a RIGHT(b,20) RIGHT(c,20)
1 dddddddddddddddddddd ffffffffffffffffffff
2 gggggggggggggggggggg hhhhhhhhhhhhhhhhhhhh
SELECT a FROM t3;
a
1
2
connect con2,localhost,root,,;
BEGIN;
INSERT INTO t2 VALUES (33101);
connection default;
SET DEBUG='+d,row_upd_extern_checkpoint';
Warnings:
Warning 1287 '@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead
SET DEBUG_SYNC='after_row_upd_extern SIGNAL have_latch WAIT_FOR crash';
UPDATE t3 SET c=REPEAT('j',3000) WHERE a=2;
connection con2;
SET DEBUG_SYNC='now WAIT_FOR have_latch';
SELECT info FROM information_schema.processlist
WHERE state = 'debug sync point: after_row_upd_extern';
info
UPDATE t3 SET c=REPEAT('j',3000) WHERE a=2
# restart
disconnect con2;
connection default;
ERROR HY000: Lost connection to server during query
CHECK TABLE t1,t2,t3;
Table Op Msg_type Msg_text
test.t1 check status OK
test.t2 check status OK
test.t3 check status OK
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
a RIGHT(b,20) RIGHT(c,20)
1 dddddddddddddddddddd ffffffffffffffffffff
2 gggggggggggggggggggg hhhhhhhhhhhhhhhhhhhh
SELECT a FROM t3;
a
1
2
SELECT * FROM t2;
a
DROP TABLE t1,t2,t3;
CREATE TABLE t1(f1 INT PRIMARY KEY, f2 TEXT)ENGINE=InnoDB
ROW_FORMAT=REDUNDANT;
SET @fill_amount = (@@innodb_page_size / 2 ) + 1 ;
INSERT INTO t1 VALUES(1, REPEAT(2, @fill_amount));
UPDATE t1 SET f1 = 2;
DROP TABLE t1;
|
