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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
|
-- source include/have_query_cache.inc
-- source include/have_ndb.inc
-- source include/not_embedded.inc
--disable_warnings
drop table if exists t1, t2, t3, t4, t5;
--enable_warnings
# Turn on and reset query cache
set GLOBAL query_cache_type=on;
set GLOBAL query_cache_size=1355776;
# Turn on thread that will fetch commit count for open tables
set GLOBAL ndb_cache_check_time=100;
reset query cache;
flush status;
# Create test tables in NDB
CREATE TABLE t1 (
pk int not null primary key,
a1 int,
b1 int not null,
c1 varchar(20)
) ENGINE=ndb;
CREATE TABLE t2 (
pk int not null primary key,
a2 int,
b2 int not null
) ENGINE=ndb;
CREATE TABLE t3 (
pk int not null primary key,
a3 int,
b3 int not null,
c3 int not null,
d3 varchar(20)
) ENGINE=ndb;
CREATE TABLE t4 (
a4 int,
b4 int not null,
c4 char(20)
) ENGINE=ndbcluster;
CREATE TABLE t5 (
pk int not null primary key,
a5 int,
b5 int not null,
c5 varchar(255)
) ENGINE=ndbcluster;
insert into t1 value (1, 2, 3, 'First row');
insert into t2 value (1, 2, 3);
insert into t3 value (1, 2, 3, 4, '3 - First row');
insert into t4 value (2, 3, '4 - First row');
insert into t5 value (1, 2, 3, '5 - First row');
# Perform one query which should be inserted in query cache
select * from t1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
# Perform the same query and make sure the query cache is hit
select * from t1;
show status like "Qcache_hits";
# Update the table and make sure the correct data is returned
update t1 set a1=3 where pk=1;
select * from t1;
show status like "Qcache_inserts";
show status like "Qcache_hits";
# Insert a new record and make sure the correct data is returned
insert into t1 value (2, 7, 8, 'Second row');
insert into t1 value (4, 5, 6, 'Fourth row');
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from t1 order by pk desc;
show status like "Qcache_hits";
# Perform a "new" query and make sure the query cache is not hit
select * from t1 where b1=3;
show status like "Qcache_queries_in_cache";
show status like "Qcache_hits";
# Same query again...
select * from t1 where b1=3;
show status like "Qcache_hits";
# Delete from the table
delete from t1 where c1='Fourth row';
show status like "Qcache_queries_in_cache";
select * from t1 where b1=3;
show status like "Qcache_hits";
# Start another connection and check that the query cache is hit
connect (con1,localhost,root,,);
connection con1;
use test;
select * from t1 order by pk desc;
select * from t1 where b1=3;
show status like "Qcache_hits";
# Update the table and switch to other connection
update t1 set a1=4 where b1=3;
connect (con2,localhost,root,,);
connection con2;
use test;
show status like "Qcache_queries_in_cache";
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
# Load all tables into cache
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
#####################################################################
# Start transaction and perform update
# Switch to other transaction and check that update does not show up
# Switch back and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
connection con1;
flush status;
begin;
update t1 set a1=5 where pk=1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
commit;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
#####################################################################
# Start transaction and perform update
# Switch to other transaction and check that update does not show up
# Switch back, perform selects and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
connection con1;
flush status;
begin;
update t1 set a1=6 where pk=1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
# The two queries below will not hit cache since transaction is ongoing
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
commit;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
#####################################################################
# Start transaction and perform insert
# Switch to other transaction and check that insert does not show up
# Switch back, perform selects and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
connection con1;
flush status;
begin;
insert into t1 set pk=5, a1=6, b1=3, c1="New row";
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 where pk=5;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
# The below four queries will not be cached, trans is ongoing
select * from t1 where pk=5;
select * from t1 where pk=5;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
commit;
connection con2;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
#####################################################################
# Start transaction and perform delete
# Switch to other transaction and check that delete does not show up
# Switch back, perform selects and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
connection con1;
flush status;
begin;
delete from t1 where pk=2;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 where pk=2;
select * from t1 order by pk desc;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
# The below four queries will not be cached, trans is ongoing
select * from t1 where pk=2;
select * from t1 order by pk desc;
select * from t1 order by pk desc;
select * from t1 where pk=2;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
commit;
connection con2;
select * from t1 order by pk desc;
select * from t1 where pk=2;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
#####################################################################
# Start a transaction which updates all tables
# Switch to other transaction and check updates does not show up
# Switch back, perform selects and commit transaction
# Switch to other transaction and check that update shows up
#####################################################################
flush status;
begin;
update t1 set a1=9 where pk=1;
update t2 set a2=9 where pk=1;
update t3 set a3=9 where pk=1;
update t4 set a4=9 where a4=2;
update t5 set a5=9 where pk=1;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
# The below five queries will not be cached, trans is ongoing
select * from t1 order by pk desc;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
commit;
connection con2;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con1;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
connection con2;
select * from t1 order by pk desc;
select * from t2;
select * from t3;
select * from t4;
select * from t5;
show status like "Qcache_queries_in_cache";
show status like "Qcache_inserts";
show status like "Qcache_hits";
drop table t1, t2, t3, t4, t5;
# There should be no queries in cache, when tables have been dropped
show status like "Qcache_queries_in_cache";
SET GLOBAL query_cache_size=0;
SET GLOBAL ndb_cache_check_time=0;
|