2
# Test of multiple key caches
5
drop table if exists t1, t2, t3;
8
SET @save_key_buffer=@@key_buffer_size;
10
SELECT @@key_buffer_size, @@small.key_buffer_size;
12
# Change default key cache size
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SET @@global.key_buffer_size=16*1024*1024;
14
SET @@global.default.key_buffer_size=16*1024*1024;
15
SET @@global.default.key_buffer_size=16*1024*1024;
17
SET @@global.small.key_buffer_size=1*1024*1024;
18
SET @@global.medium.key_buffer_size=4*1024*1024;
20
SET @@global.medium.key_buffer_size=0;
22
SET @@global.medium.key_buffer_size=0;
24
# Print key buffer with different syntaxes
25
SHOW VARIABLES like "key_buffer_size";
26
SELECT @@key_buffer_size;
27
SELECT @@global.key_buffer_size;
28
SELECT @@global.default.key_buffer_size;
29
SELECT @@global.default.`key_buffer_size`;
30
SELECT @@global.`default`.`key_buffer_size`;
31
SELECT @@`default`.key_buffer_size;
33
SELECT @@small.key_buffer_size;
34
SELECT @@medium.key_buffer_size;
36
SET @@global.key_buffer_size=@save_key_buffer;
43
SELECT @@default.key_buffer_size;
45
SELECT @@skr.storage_engine="test";
47
select @@keycache1.key_cache_block_size;
48
select @@keycache1.key_buffer_size;
49
set global keycache1.key_cache_block_size=2048;
50
select @@keycache1.key_buffer_size;
51
select @@keycache1.key_cache_block_size;
52
set global keycache1.key_buffer_size=1*1024*1024;
53
select @@keycache1.key_buffer_size;
54
select @@keycache1.key_cache_block_size;
55
set global keycache2.key_buffer_size=4*1024*1024;
56
select @@keycache2.key_buffer_size;
57
select @@keycache2.key_cache_block_size;
58
set global keycache1.key_buffer_size=0;
59
select @@keycache1.key_buffer_size;
60
select @@keycache1.key_cache_block_size;
61
select @@key_buffer_size;
62
select @@key_cache_block_size;
64
set global keycache1.key_buffer_size=1024*1024;
66
create table t1 (p int primary key, a char(10)) delay_key_write=1 ENGINE=myisam;
67
create table t2 (p int primary key, i int, a char(10), key k1(i), key k2(a)) ENGINE=myisam;
69
show status like 'key_blocks_used';
71
# Following results differs on 64 and 32 bit systems because of different
72
# pointer sizes, which takes up different amount of space in key cache
74
--replace_result 837 KEY_BLOCKS_UNUSED 906 KEY_BLOCKS_UNUSED
75
show status like 'key_blocks_unused';
77
insert into t1 values (1, 'qqqq'), (11, 'yyyy');
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insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'),
79
(3, 1, 'yyyy'), (4, 3, 'zzzz');
83
update t1 set p=2 where p=1;
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update t2 set i=2 where i=1;
86
show status like 'key_blocks_used';
87
--replace_result 833 KEY_BLOCKS_UNUSED 902 KEY_BLOCKS_UNUSED
88
show status like 'key_blocks_unused';
90
cache index t1 key (`primary`) in keycache1;
92
explain select p from t1;
94
explain select i from t2;
96
explain select count(*) from t1, t2 where t1.p = t2.i;
97
select count(*) from t1, t2 where t1.p = t2.i;
99
cache index t2 in keycache1;
100
update t2 set p=p+1000, i=2 where a='qqqq';
101
cache index t2 in keycache2;
102
insert into t2 values (2000, 3, 'yyyy');
103
cache index t2 in keycache1;
104
update t2 set p=3000 where a='zzzz';
106
explain select p from t2;
108
explain select i from t2;
110
explain select a from t2;
113
# Test some error conditions
115
cache index t1 in unknown_key_cache;
116
cache index t1 key (unknown_key) in keycache1;
118
select @@keycache2.key_buffer_size;
119
select @@keycache2.key_cache_block_size;
120
set global keycache2.key_buffer_size=0;
121
select @@keycache2.key_buffer_size;
122
select @@keycache2.key_cache_block_size;
123
set global keycache2.key_buffer_size=1024*1024;
124
select @@keycache2.key_buffer_size;
126
update t2 set p=4000 where a='zzzz';
129
set global keycache1.key_buffer_size=0;
132
explain select i from t2;
134
explain select a from t2;
140
# Use the 'small' key cache
141
create table t3 (like t1);
142
cache index t3 in small;
143
insert into t3 select * from t1;
144
cache index t3 in keycache2;
145
cache index t1,t2 in default;
148
show status like 'key_blocks_used';
149
--replace_result 837 KEY_BLOCKS_UNUSED 906 KEY_BLOCKS_UNUSED
150
show status like 'key_blocks_unused';
154
# We don't reset keycache2 as we want to ensure that mysqld will reset it
155
set global keycache2.key_buffer_size=0;
157
# Test to set up a too small size for a key cache (bug #2064)
158
set global keycache3.key_buffer_size=100;
159
set global keycache3.key_buffer_size=0;
161
# Restore the changed variable value
163
set global key_cache_block_size= @my_key_cache_block_size;
166
# Bug #19079: corrupted index when key_cache_block_size is not multiple of
169
CREATE TABLE t1(a int NOT NULL AUTO_INCREMENT PRIMARY KEY) ENGINE=MYISAM;
170
SET @my_key_cache_block_size= @@global.key_cache_block_size;
171
SET GLOBAL key_cache_block_size=1536;
172
INSERT INTO t1 VALUES (1);
173
SELECT @@key_cache_block_size;
177
CREATE TABLE t1(a int NOT NULL AUTO_INCREMENT PRIMARY KEY, b int) ENGINE=MYISAM;
178
CREATE TABLE t2(a int NOT NULL AUTO_INCREMENT PRIMARY KEY, b int) ENGINE=MYISAM;
179
SET GLOBAL key_cache_block_size=1536;
180
INSERT INTO t1 VALUES (1,0);
181
INSERT INTO t2(b) SELECT b FROM t1;
182
INSERT INTO t1(b) SELECT b FROM t2;
183
INSERT INTO t2(b) SELECT b FROM t1;
184
INSERT INTO t1(b) SELECT b FROM t2;
185
INSERT INTO t2(b) SELECT b FROM t1;
186
INSERT INTO t1(b) SELECT b FROM t2;
187
INSERT INTO t2(b) SELECT b FROM t1;
188
INSERT INTO t1(b) SELECT b FROM t2;
189
INSERT INTO t2(b) SELECT b FROM t1;
190
INSERT INTO t1(b) SELECT b FROM t2;
191
INSERT INTO t2(b) SELECT b FROM t1;
192
INSERT INTO t1(b) SELECT b FROM t2;
193
INSERT INTO t2(b) SELECT b FROM t1;
194
INSERT INTO t1(b) SELECT b FROM t2;
195
INSERT INTO t2(b) SELECT b FROM t1;
196
INSERT INTO t1(b) SELECT b FROM t2;
197
INSERT INTO t2(b) SELECT b FROM t1;
198
INSERT INTO t1(b) SELECT b FROM t2;
199
SELECT COUNT(*) FROM t1;
200
SELECT @@key_cache_block_size;
203
# Restore changed variables
204
set global key_cache_block_size= @my_key_cache_block_size;
207
# Bug#10473 - Can't set 'key_buffer_size' system variable to ZERO
208
# (One cannot drop the default key cache.)
210
set @@global.key_buffer_size=0;
211
select @@global.key_buffer_size;
214
# Bug#28478 - Improper key_cache_block_size corrupts MyISAM tables
216
SET @bug28478_key_cache_block_size= @@global.key_cache_block_size;
217
SET GLOBAL key_cache_block_size= 1536;
219
id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
225
INSERT INTO t1 (c1, c2, c3) VALUES
226
('a', 'b', 'c'), ('b', 'c', 'd'), ('c', 'd', 'e'), ('d', 'e', 'f'),
227
('e', 'f', 'g'), ('f', 'g', 'h'), ('g', 'h', 'i'), ('h', 'i', 'j'),
228
('i', 'j', 'k'), ('j', 'k', 'l'), ('k', 'l', 'm'), ('l', 'm', 'n'),
229
('m', 'n', 'o'), ('n', 'o', 'p'), ('o', 'p', 'q'), ('p', 'q', 'r'),
230
('q', 'r', 's'), ('r', 's', 't'), ('s', 't', 'u'), ('t', 'u', 'v'),
231
('u', 'v', 'w'), ('v', 'w', 'x'), ('w', 'x', 'y'), ('x', 'y', 'z');
232
INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
233
INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
234
INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
236
SHOW VARIABLES LIKE 'key_cache_block_size';
237
SET GLOBAL key_cache_block_size= @bug28478_key_cache_block_size;