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
165
166
167
168
169
170
171
172
173
174
|
# Tests for PERFORMANCE_SCHEMA
# Verify that statistics aggregated by different criteria are consistent.
--source include/not_embedded.inc
--source include/have_perfschema.inc
--echo "General cleanup"
--disable_warnings
drop table if exists t1;
--enable_warnings
update performance_schema.setup_instruments set enabled = 'NO';
update performance_schema.setup_consumers set enabled = 'NO';
# Cleanup statistics
truncate table performance_schema.file_summary_by_event_name;
truncate table performance_schema.file_summary_by_instance;
truncate table performance_schema.events_waits_summary_global_by_event_name;
truncate table performance_schema.events_waits_summary_by_instance;
truncate table performance_schema.events_waits_summary_by_thread_by_event_name;
# Start recording data
update performance_schema.setup_consumers set enabled = 'YES';
update performance_schema.setup_instruments
set enabled = 'YES', timed = 'YES';
create table t1 (
id INT PRIMARY KEY,
b CHAR(100) DEFAULT 'initial value')
ENGINE=MyISAM;
insert into t1 (id) values (1), (2), (3), (4), (5), (6), (7), (8);
# Stop recording data, so the select below don't add noise.
update performance_schema.setup_instruments SET enabled = 'NO';
# Disable all consumers, for long standing waits
update performance_schema.setup_consumers set enabled = 'NO';
# Helper to debug
set @dump_all=FALSE;
# Note that in general:
# - COUNT/SUM/MAX(file_summary_by_event_name) >=
# COUNT/SUM/MAX(file_summary_by_instance).
# - MIN(file_summary_by_event_name) <=
# MIN(file_summary_by_instance).
# There will be equality only when file instances are not removed,
# aka when a file is not deleted from the file system,
# because doing so removes a row in file_summary_by_instance.
# Likewise:
# - COUNT/SUM/MAX(events_waits_summary_global_by_event_name) >=
# COUNT/SUM/MAX(events_waits_summary_by_instance)
# - MIN(events_waits_summary_global_by_event_name) <=
# MIN(events_waits_summary_by_instance)
# There will be equality only when an instrument instance
# is not removed, which is next to impossible to predictably guarantee
# in the server.
# For example, a MyISAM table removed from the table cache
# will cause a mysql_mutex_destroy on myisam/MYISAM_SHARE::intern_lock.
# Another example, a thread terminating will cause a mysql_mutex_destroy
# on sql/LOCK_delete
# Both cause a row to be deleted from events_waits_summary_by_instance.
# Likewise:
# - COUNT/SUM/MAX(events_waits_summary_global_by_event_name) >=
# COUNT/SUM/MAX(events_waits_summary_by_thread_by_event_name)
# - MIN(events_waits_summary_global_by_event_name) <=
# MIN(events_waits_summary_by_thread_by_event_name)
# There will be equality only when no thread is removed,
# that is if no thread disconnects, or no sub thread (for example insert
# delayed) ever completes.
# A thread completing will cause rows in
# events_waits_summary_by_thread_by_event_name to be removed.
--echo "Verifying file aggregate consistency"
# Since the code generating the load in this test does:
# - create table
# - insert
# - does not cause temporary tables to be used
# we can test for equality here for file aggregates.
# If any of these queries returns data, the test failed.
SELECT EVENT_NAME, e.COUNT_READ, SUM(i.COUNT_READ)
FROM performance_schema.file_summary_by_event_name AS e
JOIN performance_schema.file_summary_by_instance AS i USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.COUNT_READ <> SUM(i.COUNT_READ))
OR @dump_all;
SELECT EVENT_NAME, e.COUNT_WRITE, SUM(i.COUNT_WRITE)
FROM performance_schema.file_summary_by_event_name AS e
JOIN performance_schema.file_summary_by_instance AS i USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.COUNT_WRITE <> SUM(i.COUNT_WRITE))
OR @dump_all;
SELECT EVENT_NAME, e.SUM_NUMBER_OF_BYTES_READ, SUM(i.SUM_NUMBER_OF_BYTES_READ)
FROM performance_schema.file_summary_by_event_name AS e
JOIN performance_schema.file_summary_by_instance AS i USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.SUM_NUMBER_OF_BYTES_READ <> SUM(i.SUM_NUMBER_OF_BYTES_READ))
OR @dump_all;
SELECT EVENT_NAME, e.SUM_NUMBER_OF_BYTES_WRITE, SUM(i.SUM_NUMBER_OF_BYTES_WRITE)
FROM performance_schema.file_summary_by_event_name AS e
JOIN performance_schema.file_summary_by_instance AS i USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.SUM_NUMBER_OF_BYTES_WRITE <> SUM(i.SUM_NUMBER_OF_BYTES_WRITE))
OR @dump_all;
--echo "Verifying waits aggregate consistency (instance)"
SELECT EVENT_NAME, e.SUM_TIMER_WAIT, SUM(i.SUM_TIMER_WAIT)
FROM performance_schema.events_waits_summary_global_by_event_name AS e
JOIN performance_schema.events_waits_summary_by_instance AS i USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.SUM_TIMER_WAIT < SUM(i.SUM_TIMER_WAIT))
OR @dump_all;
SELECT EVENT_NAME, e.MIN_TIMER_WAIT, MIN(i.MIN_TIMER_WAIT)
FROM performance_schema.events_waits_summary_global_by_event_name AS e
JOIN performance_schema.events_waits_summary_by_instance AS i USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.MIN_TIMER_WAIT > MIN(i.MIN_TIMER_WAIT))
AND (MIN(i.MIN_TIMER_WAIT) != 0)
OR @dump_all;
SELECT EVENT_NAME, e.MAX_TIMER_WAIT, MAX(i.MAX_TIMER_WAIT)
FROM performance_schema.events_waits_summary_global_by_event_name AS e
JOIN performance_schema.events_waits_summary_by_instance AS i USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.MAX_TIMER_WAIT < MAX(i.MAX_TIMER_WAIT))
OR @dump_all;
--echo "Verifying waits aggregate consistency (thread)"
SELECT EVENT_NAME, e.SUM_TIMER_WAIT, SUM(t.SUM_TIMER_WAIT)
FROM performance_schema.events_waits_summary_global_by_event_name AS e
JOIN performance_schema.events_waits_summary_by_thread_by_event_name AS t
USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.SUM_TIMER_WAIT < SUM(t.SUM_TIMER_WAIT))
OR @dump_all;
SELECT EVENT_NAME, e.MIN_TIMER_WAIT, MIN(t.MIN_TIMER_WAIT)
FROM performance_schema.events_waits_summary_global_by_event_name AS e
JOIN performance_schema.events_waits_summary_by_thread_by_event_name AS t
USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.MIN_TIMER_WAIT > MIN(t.MIN_TIMER_WAIT))
AND (MIN(t.MIN_TIMER_WAIT) != 0)
OR @dump_all;
SELECT EVENT_NAME, e.MAX_TIMER_WAIT, MAX(t.MAX_TIMER_WAIT)
FROM performance_schema.events_waits_summary_global_by_event_name AS e
JOIN performance_schema.events_waits_summary_by_thread_by_event_name AS t
USING (EVENT_NAME)
GROUP BY EVENT_NAME
HAVING (e.MAX_TIMER_WAIT < MAX(t.MAX_TIMER_WAIT))
OR @dump_all;
# Cleanup
update performance_schema.setup_consumers set enabled = 'YES';
update performance_schema.setup_instruments
set enabled = 'YES', timed = 'YES';
drop table test.t1;
|
