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489a3fe4ee
Setting a key_cache_block_size which is not a power of 2 could corrupt MyISAM tables. A couple of computations in the key cache code use bit operations which do only work if key_cache_block_size is a power of 2. Replaced bit operations by arithmetic operations to make key cache able to handle block sizes that are not a power of 2. include/keycache.h: Bug#28478 - Improper key_cache_block_size corrupts MyISAM tables Removed element 'key_cache_shift' from KEY_CACHE after the changes in mf_keycache.c made it unused. mysql-test/r/key_cache.result: Bug#28478 - Improper key_cache_block_size corrupts MyISAM tables Added test result mysql-test/t/key_cache.test: Bug#28478 - Improper key_cache_block_size corrupts MyISAM tables Added test mysys/mf_keycache.c: Bug#28478 - Improper key_cache_block_size corrupts MyISAM tables Replaced bit operations by arithmetic operations to make key cache able to handle block sizes that are not a power of 2.
249 lines
7.5 KiB
Text
249 lines
7.5 KiB
Text
#
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# Test of multiple key caches
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#
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--disable_warnings
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drop table if exists t1, t2, t3;
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--enable_warnings
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SET @save_key_buffer=@@key_buffer_size;
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SELECT @@key_buffer_size, @@small.key_buffer_size;
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# Change default key cache size
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SET @@global.key_buffer_size=16*1024*1024;
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SET @@global.default.key_buffer_size=16*1024*1024;
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SET @@global.default.key_buffer_size=16*1024*1024;
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SET @@global.small.key_buffer_size=1*1024*1024;
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SET @@global.medium.key_buffer_size=4*1024*1024;
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# Drop buffer
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SET @@global.medium.key_buffer_size=0;
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# Test double drop
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SET @@global.medium.key_buffer_size=0;
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# Print key buffer with different syntaxes
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SHOW VARIABLES like "key_buffer_size";
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SELECT @@key_buffer_size;
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SELECT @@global.key_buffer_size;
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SELECT @@global.default.key_buffer_size;
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SELECT @@global.default.`key_buffer_size`;
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SELECT @@global.`default`.`key_buffer_size`;
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SELECT @@`default`.key_buffer_size;
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SELECT @@small.key_buffer_size;
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SELECT @@medium.key_buffer_size;
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SET @@global.key_buffer_size=@save_key_buffer;
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#
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# Errors
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#
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--error 1064
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SELECT @@default.key_buffer_size;
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--error 1272
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SELECT @@skr.storage_engine="test";
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select @@keycache1.key_cache_block_size;
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select @@keycache1.key_buffer_size;
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set global keycache1.key_cache_block_size=2048;
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select @@keycache1.key_buffer_size;
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select @@keycache1.key_cache_block_size;
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set global keycache1.key_buffer_size=1*1024*1024;
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select @@keycache1.key_buffer_size;
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select @@keycache1.key_cache_block_size;
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set global keycache2.key_buffer_size=4*1024*1024;
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select @@keycache2.key_buffer_size;
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select @@keycache2.key_cache_block_size;
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set global keycache1.key_buffer_size=0;
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select @@keycache1.key_buffer_size;
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select @@keycache1.key_cache_block_size;
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select @@key_buffer_size;
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select @@key_cache_block_size;
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set global keycache1.key_buffer_size=1024*1024;
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create table t1 (p int primary key, a char(10)) delay_key_write=1;
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create table t2 (p int primary key, i int, a char(10), key k1(i), key k2(a));
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show status like 'key_blocks_used';
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# Following results differs on 64 and 32 bit systems because of different
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# pointer sizes, which takes up different amount of space in key cache
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--replace_result 1812 KEY_BLOCKS_UNUSED 1793 KEY_BLOCKS_UNUSED 1674 KEY_BLOCKS_UNUSED 1818 KEY_BLOCKS_UNUSED 1824 KEY_BLOCKS_UNUSED
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show status like 'key_blocks_unused';
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insert into t1 values (1, 'qqqq'), (11, 'yyyy');
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insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'),
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(3, 1, 'yyyy'), (4, 3, 'zzzz');
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select * from t1;
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select * from t2;
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update t1 set p=2 where p=1;
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update t2 set i=2 where i=1;
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show status like 'key_blocks_used';
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--replace_result 1808 KEY_BLOCKS_UNUSED 1789 KEY_BLOCKS_UNUSED 1670 KEY_BLOCKS_UNUSED 1814 KEY_BLOCKS_UNUSED 1820 KEY_BLOCKS_UNUSED
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show status like 'key_blocks_unused';
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cache index t1 key (`primary`) in keycache1;
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explain select p from t1;
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select p from t1;
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explain select i from t2;
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select i from t2;
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explain select count(*) from t1, t2 where t1.p = t2.i;
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select count(*) from t1, t2 where t1.p = t2.i;
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cache index t2 in keycache1;
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update t2 set p=p+1000, i=2 where a='qqqq';
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cache index t2 in keycache2;
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insert into t2 values (2000, 3, 'yyyy');
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cache index t2 in keycache1;
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update t2 set p=3000 where a='zzzz';
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select * from t2;
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explain select p from t2;
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select p from t2;
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explain select i from t2;
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select i from t2;
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explain select a from t2;
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select a from t2;
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# Test some error conditions
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--error 1284
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cache index t1 in unknown_key_cache;
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cache index t1 key (unknown_key) in keycache1;
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select @@keycache2.key_buffer_size;
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select @@keycache2.key_cache_block_size;
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set global keycache2.key_buffer_size=0;
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select @@keycache2.key_buffer_size;
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select @@keycache2.key_cache_block_size;
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set global keycache2.key_buffer_size=1024*1024;
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select @@keycache2.key_buffer_size;
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update t2 set p=4000 where a='zzzz';
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update t1 set p=p+1;
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set global keycache1.key_buffer_size=0;
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select * from t2;
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select p from t2;
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explain select i from t2;
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select i from t2;
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explain select a from t2;
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select a from t2;
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select * from t1;
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select p from t1;
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# Use the 'small' key cache
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create table t3 (like t1);
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cache index t3 in small;
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insert into t3 select * from t1;
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cache index t3 in keycache2;
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cache index t1,t2 in default;
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drop table t1,t2,t3;
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show status like 'key_blocks_used';
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--replace_result 1812 KEY_BLOCKS_UNUSED 1793 KEY_BLOCKS_UNUSED 1674 KEY_BLOCKS_UNUSED 1818 KEY_BLOCKS_UNUSED 1824 KEY_BLOCKS_UNUSED
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show status like 'key_blocks_unused';
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# Cleanup
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# We don't reset keycache2 as we want to ensure that mysqld will reset it
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set global keycache2.key_buffer_size=0;
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# Test to set up a too small size for a key cache (bug #2064)
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set global keycache3.key_buffer_size=100;
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set global keycache3.key_buffer_size=0;
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# Test case for bug 6447
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create table t1 (mytext text, FULLTEXT (mytext));
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insert t1 values ('aaabbb');
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check table t1;
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set @my_key_cache_block_size= @@global.key_cache_block_size;
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set GLOBAL key_cache_block_size=2048;
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check table t1;
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drop table t1;
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# Restore the changed variable value
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set global key_cache_block_size= @my_key_cache_block_size;
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#
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# Bug #19079: corrupted index when key_cache_block_size is not multiple of
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# myisam_block_size
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CREATE TABLE t1(a int NOT NULL AUTO_INCREMENT PRIMARY KEY);
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SET @my_key_cache_block_size= @@global.key_cache_block_size;
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SET GLOBAL key_cache_block_size=1536;
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INSERT INTO t1 VALUES (1);
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SELECT @@key_cache_block_size;
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CHECK TABLE t1;
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DROP TABLE t1;
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CREATE TABLE t1(a int NOT NULL AUTO_INCREMENT PRIMARY KEY, b int);
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CREATE TABLE t2(a int NOT NULL AUTO_INCREMENT PRIMARY KEY, b int);
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SET GLOBAL key_cache_block_size=1536;
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INSERT INTO t1 VALUES (1,0);
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INSERT INTO t2(b) SELECT b FROM t1;
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INSERT INTO t1(b) SELECT b FROM t2;
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INSERT INTO t2(b) SELECT b FROM t1;
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INSERT INTO t1(b) SELECT b FROM t2;
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INSERT INTO t2(b) SELECT b FROM t1;
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INSERT INTO t1(b) SELECT b FROM t2;
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INSERT INTO t2(b) SELECT b FROM t1;
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INSERT INTO t1(b) SELECT b FROM t2;
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INSERT INTO t2(b) SELECT b FROM t1;
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INSERT INTO t1(b) SELECT b FROM t2;
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INSERT INTO t2(b) SELECT b FROM t1;
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INSERT INTO t1(b) SELECT b FROM t2;
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INSERT INTO t2(b) SELECT b FROM t1;
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INSERT INTO t1(b) SELECT b FROM t2;
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INSERT INTO t2(b) SELECT b FROM t1;
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INSERT INTO t1(b) SELECT b FROM t2;
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INSERT INTO t2(b) SELECT b FROM t1;
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INSERT INTO t1(b) SELECT b FROM t2;
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SELECT COUNT(*) FROM t1;
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SELECT @@key_cache_block_size;
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CHECK TABLE t1;
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DROP TABLE t1,t2;
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# Restore changed variables
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set global key_cache_block_size= @my_key_cache_block_size;
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#
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# Bug#10473 - Can't set 'key_buffer_size' system variable to ZERO
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# (One cannot drop the default key cache.)
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#
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set @@global.key_buffer_size=0;
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select @@global.key_buffer_size;
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#
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# Bug#28478 - Improper key_cache_block_size corrupts MyISAM tables
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#
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SET @bug28478_key_cache_block_size= @@global.key_cache_block_size;
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SET GLOBAL key_cache_block_size= 1536;
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CREATE TABLE t1 (
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id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
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c1 CHAR(150),
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c2 CHAR(150),
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c3 CHAR(150),
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KEY(c1, c2, c3)
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) ENGINE= MyISAM;
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INSERT INTO t1 (c1, c2, c3) VALUES
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('a', 'b', 'c'), ('b', 'c', 'd'), ('c', 'd', 'e'), ('d', 'e', 'f'),
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('e', 'f', 'g'), ('f', 'g', 'h'), ('g', 'h', 'i'), ('h', 'i', 'j'),
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('i', 'j', 'k'), ('j', 'k', 'l'), ('k', 'l', 'm'), ('l', 'm', 'n'),
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('m', 'n', 'o'), ('n', 'o', 'p'), ('o', 'p', 'q'), ('p', 'q', 'r'),
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('q', 'r', 's'), ('r', 's', 't'), ('s', 't', 'u'), ('t', 'u', 'v'),
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('u', 'v', 'w'), ('v', 'w', 'x'), ('w', 'x', 'y'), ('x', 'y', 'z');
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INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
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INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
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INSERT INTO t1 (c1, c2, c3) SELECT c1, c2, c3 from t1;
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CHECK TABLE t1;
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SHOW VARIABLES LIKE 'key_cache_block_size';
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SET GLOBAL key_cache_block_size= @bug28478_key_cache_block_size;
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DROP TABLE t1;
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# End of 4.1 tests
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