mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 03:52:35 +01:00
864 lines
32 KiB
Text
864 lines
32 KiB
Text
drop table if exists t1, t2, t3;
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ALTER DATABASE test CHARACTER SET latin1 COLLATE latin1_swedish_ci;
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SET @save_key_buffer_size=@@key_buffer_size;
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SET @save_key_cache_block_size=@@key_cache_block_size;
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SET @save_key_cache_segments=@@key_cache_segments;
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SET @save_key_cache_file_hash_size=@@key_cache_file_hash_size;
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SELECT @@key_buffer_size, @@small.key_buffer_size;
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@@key_buffer_size @@small.key_buffer_size
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2097152 131072
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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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SET @@global.medium.key_buffer_size=0;
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SET @@global.medium.key_buffer_size=0;
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SHOW VARIABLES like "key_buffer_size";
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Variable_name Value
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key_buffer_size 16777216
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SELECT @@key_buffer_size;
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@@key_buffer_size
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16777216
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SELECT @@global.key_buffer_size;
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@@global.key_buffer_size
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16777216
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SELECT @@global.default.key_buffer_size;
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@@global.default.key_buffer_size
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16777216
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SELECT @@global.default.`key_buffer_size`;
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@@global.default.`key_buffer_size`
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16777216
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SELECT @@global.`default`.`key_buffer_size`;
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@@global.`default`.`key_buffer_size`
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16777216
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SELECT @@`default`.key_buffer_size;
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@@`default`.key_buffer_size
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16777216
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SELECT @@small.key_buffer_size;
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@@small.key_buffer_size
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1048576
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SELECT @@medium.key_buffer_size;
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@@medium.key_buffer_size
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0
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SET @@global.key_buffer_size=@save_key_buffer_size;
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SELECT @@default.key_buffer_size;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'default.key_buffer_size' at line 1
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SELECT @@skr.default_storage_engine="test";
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ERROR HY000: Variable 'default_storage_engine' is not a variable component (can't be used as XXXX.variable_name)
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select @@keycache1.key_cache_block_size;
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@@keycache1.key_cache_block_size
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0
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select @@keycache1.key_buffer_size;
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@@keycache1.key_buffer_size
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0
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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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@@keycache1.key_buffer_size
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0
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select @@keycache1.key_cache_block_size;
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@@keycache1.key_cache_block_size
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2048
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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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@@keycache1.key_buffer_size
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1048576
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select @@keycache1.key_cache_block_size;
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@@keycache1.key_cache_block_size
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2048
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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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@@keycache2.key_buffer_size
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4194304
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select @@keycache2.key_cache_block_size;
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@@keycache2.key_cache_block_size
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1024
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set global keycache1.key_buffer_size=0;
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select @@keycache1.key_buffer_size;
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@@keycache1.key_buffer_size
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0
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select @@keycache1.key_cache_block_size;
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@@keycache1.key_cache_block_size
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2048
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select @@key_buffer_size;
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@@key_buffer_size
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2097152
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select @@key_cache_block_size;
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@@key_cache_block_size
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1024
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select @@key_cache_file_hash_size;
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@@key_cache_file_hash_size
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512
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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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select @org_key_blocks_unused-unused_blocks as key_blocks_unused, used_blocks as key_blocks_used from information_schema.key_caches where key_cache_name="default";
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key_blocks_unused key_blocks_used
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0 0
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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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p a
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1 qqqq
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11 yyyy
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select * from t2;
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p i a
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1 1 qqqq
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2 1 pppp
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3 1 yyyy
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4 3 zzzz
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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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select @org_key_blocks_unused-unused_blocks as key_blocks_unused, used_blocks as key_blocks_used from information_schema.key_caches where key_cache_name="default";
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key_blocks_unused key_blocks_used
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4 4
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cache index t1 key (`primary`) in keycache1;
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Table Op Msg_type Msg_text
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test.t1 assign_to_keycache status OK
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explain select p from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 Using index
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select p from t1;
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p
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2
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11
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explain select i from t2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index NULL k1 5 NULL 4 Using index
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select i from t2;
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i
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2
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2
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2
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3
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explain select count(*) from t1, t2 where t1.p = t2.i;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2 Using index
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1 SIMPLE t2 ref k1 k1 5 test.t1.p 1 Using index
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select count(*) from t1, t2 where t1.p = t2.i;
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count(*)
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3
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cache index t2 in keycache1;
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Table Op Msg_type Msg_text
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test.t2 assign_to_keycache status OK
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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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Table Op Msg_type Msg_text
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test.t2 assign_to_keycache status OK
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insert into t2 values (2000, 3, 'yyyy');
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cache index t2 in keycache1;
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Table Op Msg_type Msg_text
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test.t2 assign_to_keycache status OK
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update t2 set p=3000 where a='zzzz';
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select * from t2;
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p i a
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1001 2 qqqq
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2 2 pppp
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3 2 yyyy
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3000 3 zzzz
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2000 3 yyyy
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explain select p from t2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index NULL PRIMARY 4 NULL 5 Using index
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select p from t2;
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p
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2
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3
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1001
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2000
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3000
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explain select i from t2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index NULL k1 5 NULL 5 Using index
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select i from t2;
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i
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2
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2
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2
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3
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3
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explain select a from t2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index NULL k2 11 NULL 5 Using index
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select a from t2;
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a
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pppp
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qqqq
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yyyy
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yyyy
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zzzz
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cache index t1 in unknown_key_cache;
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ERROR HY000: Unknown key cache 'unknown_key_cache'
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cache index t1 key (unknown_key) in keycache1;
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Table Op Msg_type Msg_text
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test.t1 assign_to_keycache Error Key 'unknown_key' doesn't exist in table 't1'
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test.t1 assign_to_keycache status Operation failed
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select @@keycache2.key_buffer_size;
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@@keycache2.key_buffer_size
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4194304
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select @@keycache2.key_cache_block_size;
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@@keycache2.key_cache_block_size
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1024
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set global keycache2.key_buffer_size=0;
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select @@keycache2.key_buffer_size;
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@@keycache2.key_buffer_size
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0
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select @@keycache2.key_cache_block_size;
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@@keycache2.key_cache_block_size
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1024
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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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@@keycache2.key_buffer_size
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1048576
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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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p i a
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1001 2 qqqq
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2 2 pppp
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3 2 yyyy
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4000 3 zzzz
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2000 3 yyyy
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select p from t2;
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p
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2
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3
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1001
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2000
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4000
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explain select i from t2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index NULL k1 5 NULL 5 Using index
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select i from t2;
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i
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2
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2
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2
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3
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3
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explain select a from t2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index NULL k2 11 NULL 5 Using index
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select a from t2;
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a
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pppp
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qqqq
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yyyy
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yyyy
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zzzz
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select * from t1;
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p a
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3 qqqq
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12 yyyy
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select p from t1;
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p
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3
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12
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create table t3 (like t1);
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cache index t3 in small;
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Table Op Msg_type Msg_text
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test.t3 assign_to_keycache status OK
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insert into t3 select * from t1;
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cache index t3 in keycache2;
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Table Op Msg_type Msg_text
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test.t3 assign_to_keycache status OK
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cache index t1,t2 in default;
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Table Op Msg_type Msg_text
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test.t1 assign_to_keycache status OK
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test.t2 assign_to_keycache status OK
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drop table t1,t2,t3;
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select @org_key_blocks_unused-unused_blocks as key_blocks_unused, used_blocks as key_blocks_used from information_schema.key_caches where key_cache_name="default";
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key_blocks_unused key_blocks_used
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0 4
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create table t1 (a int primary key);
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cache index t1 in keycache2;
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Table Op Msg_type Msg_text
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test.t1 assign_to_keycache status OK
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insert t1 values (1),(2),(3),(4),(5),(6),(7),(8);
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set global keycache2.key_buffer_size=0;
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select * from t1;
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a
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1
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2
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3
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4
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5
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6
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7
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8
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drop table t1;
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set global keycache3.key_buffer_size=100;
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Warnings:
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Warning 1292 Truncated incorrect key_buffer_size value: '100'
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set global keycache3.key_buffer_size=0;
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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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Table Op Msg_type Msg_text
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test.t1 check status OK
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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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Table Op Msg_type Msg_text
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test.t1 check status OK
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drop table t1;
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set global key_cache_block_size= @my_key_cache_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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@@key_cache_block_size
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1536
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CHECK TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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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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COUNT(*)
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4181
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SELECT @@key_cache_block_size;
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@@key_cache_block_size
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1536
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CHECK TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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DROP TABLE t1,t2;
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set global key_cache_block_size= @my_key_cache_block_size;
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set @@global.key_buffer_size=0;
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ERROR HY000: Cannot drop default keycache
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select @@global.key_buffer_size;
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@@global.key_buffer_size
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2097152
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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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Table Op Msg_type Msg_text
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test.t1 check status OK
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SHOW VARIABLES LIKE 'key_cache_block_size';
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Variable_name Value
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key_cache_block_size 1536
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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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#
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# Bug#12361113: crash when load index into cache
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#
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# Note that this creates an empty disabled key cache!
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SET GLOBAL key_cache_none.key_cache_block_size = 1024;
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CREATE TABLE t1 (a INT, b INTEGER NOT NULL, KEY (b) ) ENGINE = MYISAM;
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INSERT INTO t1 VALUES (1, 1);
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CACHE INDEX t1 in key_cache_none;
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ERROR HY000: Unknown key cache 'key_cache_none'
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# The bug crashed the server at LOAD INDEX below. Now it will succeed
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# since the default cache is used due to CACHE INDEX failed for
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# key_cache_none.
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LOAD INDEX INTO CACHE t1;
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Table Op Msg_type Msg_text
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test.t1 preload_keys status OK
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DROP TABLE t1;
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set global key_buffer_size=@save_key_buffer_size;
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set global key_cache_block_size=@save_key_cache_block_size;
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select @@key_buffer_size;
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@@key_buffer_size
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2097152
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select @@key_cache_block_size;
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@@key_cache_block_size
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1024
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select @@key_cache_segments;
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@@key_cache_segments
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0
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create table t1 (
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p int not null auto_increment primary key,
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a char(10));
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create table t2 (
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p int not null auto_increment primary key,
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i int, a char(10), key k1(i), key k2(a));
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select @@key_cache_segments;
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@@key_cache_segments
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0
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select * from information_schema.key_caches where segment_number is null;
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KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
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default NULL NULL 2097152 1024 0 # 0 0 0 0 0
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small NULL NULL 1048576 1024 1 # 0 1 0 2 1
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insert into t1 values (1, 'qqqq'), (2, '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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p a
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1 qqqq
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2 yyyy
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select * from t2;
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p i a
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1 1 qqqq
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2 1 pppp
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3 1 yyyy
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4 3 zzzz
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update t1 set p=3 where p=1;
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set statement optimizer_scan_setup_cost=0 for update t2 set i=2 where i=1;
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select * from information_schema.session_status where variable_name like 'key_%' and variable_name != 'Key_blocks_unused';
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VARIABLE_NAME VARIABLE_VALUE
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KEY_BLOCKS_NOT_FLUSHED 0
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KEY_BLOCKS_USED 4
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KEY_BLOCKS_WARM 0
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KEY_READ_REQUESTS 21
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KEY_READS 0
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KEY_WRITE_REQUESTS 26
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KEY_WRITES 6
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select variable_value into @key_blocks_unused from information_schema.session_status where variable_name = 'Key_blocks_unused';
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default NULL NULL 2097152 1024 4 # 0 21 0 26 6
|
|
small NULL NULL 1048576 1024 1 # 0 1 0 2 1
|
|
delete from t2 where a='zzzz';
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default NULL NULL 2097152 1024 4 # 0 28 0 32 9
|
|
small NULL NULL 1048576 1024 1 # 0 1 0 2 1
|
|
delete from t1;
|
|
delete from t2;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default NULL NULL 2097152 1024 4 # 0 28 0 32 9
|
|
small NULL NULL 1048576 1024 1 # 0 1 0 2 1
|
|
set global key_cache_segments=2;
|
|
select @@key_cache_segments;
|
|
@@key_cache_segments
|
|
2
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 2097152 1024 0 # 0 0 0 0 0
|
|
small NULL NULL 1048576 1024 1 # 0 1 0 2 1
|
|
insert into t1 values (1, 'qqqq'), (2, 'yyyy');
|
|
insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'),
|
|
(3, 1, 'yyyy'), (4, 3, 'zzzz');
|
|
select * from t1;
|
|
p a
|
|
1 qqqq
|
|
2 yyyy
|
|
select * from t2;
|
|
p i a
|
|
1 1 qqqq
|
|
2 1 pppp
|
|
3 1 yyyy
|
|
4 3 zzzz
|
|
update t1 set p=3 where p=1;
|
|
set statement optimizer_scan_setup_cost=0 for update t2 set i=2 where i=1;
|
|
select * from information_schema.session_status where variable_name like 'key_%' and variable_name != 'Key_blocks_unused';
|
|
VARIABLE_NAME VARIABLE_VALUE
|
|
KEY_BLOCKS_NOT_FLUSHED 0
|
|
KEY_BLOCKS_USED 4
|
|
KEY_BLOCKS_WARM 0
|
|
KEY_READ_REQUESTS 21
|
|
KEY_READS 0
|
|
KEY_WRITE_REQUESTS 26
|
|
KEY_WRITES 6
|
|
select variable_value < @key_blocks_unused from information_schema.session_status where variable_name = 'Key_blocks_unused';
|
|
variable_value < @key_blocks_unused
|
|
1
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 2097152 1024 4 # 0 21 0 26 6
|
|
small NULL NULL 1048576 1024 1 # 0 1 0 2 1
|
|
delete from t1;
|
|
delete from t2;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 2097152 1024 4 # 0 21 0 26 6
|
|
small NULL NULL 1048576 1024 1 # 0 1 0 2 1
|
|
set global key_cache_segments=1;
|
|
select @@key_cache_segments;
|
|
@@key_cache_segments
|
|
1
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 1 NULL 2097152 1024 0 # 0 0 0 0 0
|
|
small NULL NULL 1048576 1024 1 # 0 1 0 2 1
|
|
insert into t1 values (1, 'qqqq'), (2, 'yyyy');
|
|
insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'),
|
|
(3, 1, 'yyyy'), (4, 3, 'zzzz');
|
|
select * from t1;
|
|
p a
|
|
1 qqqq
|
|
2 yyyy
|
|
select * from t2;
|
|
p i a
|
|
1 1 qqqq
|
|
2 1 pppp
|
|
3 1 yyyy
|
|
4 3 zzzz
|
|
update t1 set p=3 where p=1;
|
|
set statement optimizer_scan_setup_cost=0 for update t2 set i=2 where i=1;
|
|
select * from information_schema.session_status where variable_name like 'key_%' and variable_name != 'Key_blocks_unused';
|
|
VARIABLE_NAME VARIABLE_VALUE
|
|
KEY_BLOCKS_NOT_FLUSHED 0
|
|
KEY_BLOCKS_USED 4
|
|
KEY_BLOCKS_WARM 0
|
|
KEY_READ_REQUESTS 21
|
|
KEY_READS 0
|
|
KEY_WRITE_REQUESTS 26
|
|
KEY_WRITES 6
|
|
select variable_value = @key_blocks_unused from information_schema.session_status where variable_name = 'Key_blocks_unused';
|
|
variable_value = @key_blocks_unused
|
|
1
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 1 NULL 2097152 1024 4 # 0 21 0 26 6
|
|
small NULL NULL 1048576 1024 1 # 0 1 0 2 1
|
|
delete from t1;
|
|
delete from t2;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 1 NULL 2097152 1024 4 # 0 21 0 26 6
|
|
small NULL NULL 1048576 1024 1 # 0 1 0 2 1
|
|
flush tables;
|
|
flush global status;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 1 NULL 2097152 1024 4 # 0 0 0 0 0
|
|
small NULL NULL 1048576 1024 1 # 0 0 0 0 0
|
|
set global key_buffer_size=32*1024;
|
|
set global key_cache_file_hash_size=128;
|
|
select @@key_buffer_size;
|
|
@@key_buffer_size
|
|
32768
|
|
set global key_cache_segments=2;
|
|
select @@key_cache_segments;
|
|
@@key_cache_segments
|
|
2
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 0 # 0 0 0 0 0
|
|
small NULL NULL 1048576 1024 1 # 0 0 0 0 0
|
|
insert into t1 values (1, 'qqqq'), (2, 'yyyy');
|
|
insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'),
|
|
(3, 1, 'yyyy'), (4, 3, 'zzzz');
|
|
select * from t1;
|
|
p a
|
|
1 qqqq
|
|
2 yyyy
|
|
select * from t2;
|
|
p i a
|
|
1 1 qqqq
|
|
2 1 pppp
|
|
3 1 yyyy
|
|
4 3 zzzz
|
|
update t1 set p=3 where p=1;
|
|
set statement optimizer_scan_setup_cost=0 for update t2 set i=2 where i=1;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 4 # 0 21 0 26 6
|
|
small NULL NULL 1048576 1024 1 # 0 0 0 0 0
|
|
insert into t1(a) select a from t1;
|
|
insert into t1(a) select a from t1;
|
|
insert into t1(a) select a from t1;
|
|
insert into t1(a) select a from t1;
|
|
insert into t1(a) select a from t1;
|
|
insert into t1(a) select a from t1;
|
|
insert into t1(a) select a from t1;
|
|
insert into t1(a) select a from t1;
|
|
insert into t2(i,a) select i,a from t2;
|
|
insert into t2(i,a) select i,a from t2;
|
|
insert into t2(i,a) select i,a from t2;
|
|
insert into t2(i,a) select i,a from t2;
|
|
insert into t2(i,a) select i,a from t2;
|
|
insert into t2(i,a) select i,a from t2;
|
|
insert into t2(i,a) select i,a from t2;
|
|
insert into t2(i,a) select i,a from t2;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 6732 # 3684 103
|
|
small NULL NULL 1048576 1024 # # 0 0 # 0 0
|
|
select * from t1 where p between 1010 and 1020 ;
|
|
p a
|
|
select * from t2 where p between 1010 and 1020 ;
|
|
p i a
|
|
1010 2 pppp
|
|
1011 2 yyyy
|
|
1012 3 zzzz
|
|
1013 2 qqqq
|
|
1014 2 pppp
|
|
1015 2 yyyy
|
|
1016 3 zzzz
|
|
1017 2 qqqq
|
|
1018 2 pppp
|
|
1019 2 yyyy
|
|
1020 3 zzzz
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 6749 # 3684 103
|
|
small NULL NULL 1048576 1024 # # 0 0 # 0 0
|
|
analyze table t2;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 analyze status Engine-independent statistics collected
|
|
test.t2 analyze status OK
|
|
flush tables;
|
|
flush global status;
|
|
update t1 set a='zzzz' where a='qqqq';
|
|
set statement optimizer_scan_setup_cost=0 for update t2 set i=1 where i=2;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3076 18 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
set global keycache1.key_buffer_size=256*1024;
|
|
select @@keycache1.key_buffer_size;
|
|
@@keycache1.key_buffer_size
|
|
262144
|
|
set global keycache1.key_cache_segments=7;
|
|
select @@keycache1.key_cache_segments;
|
|
@@keycache1.key_cache_segments
|
|
7
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3076 18 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache1 7 NULL 262143 2048 # # 0 0 0 0 0
|
|
select * from information_schema.key_caches where key_cache_name like "key%"
|
|
and segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
keycache1 7 NULL 262143 2048 0 # 0 0 0 0 0
|
|
cache index t1 key (`primary`) in keycache1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 assign_to_keycache status OK
|
|
explain select p from t1 where p between 1010 and 1020;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 1 Using where; Using index
|
|
select p from t1 where p between 1010 and 1020;
|
|
p
|
|
explain select i from t2 where p between 1010 and 1020;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 9 Using index condition
|
|
select i from t2 where p between 1010 and 1020;
|
|
i
|
|
1
|
|
1
|
|
3
|
|
1
|
|
1
|
|
1
|
|
3
|
|
1
|
|
1
|
|
1
|
|
3
|
|
explain select count(*) from t1, t2 where t1.p = t2.i;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 index k1 k1 5 NULL 1024 Using where; Using index
|
|
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.i 1 Using index
|
|
select count(*) from t1, t2 where t1.p = t2.i;
|
|
count(*)
|
|
256
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache1 7 NULL 262143 2048 # # 0 14 3 0 0
|
|
select * from information_schema.key_caches where key_cache_name like "key%"
|
|
and segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
keycache1 7 NULL 262143 2048 3 # 0 14 3 0 0
|
|
cache index t2 in keycache1;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 assign_to_keycache status OK
|
|
update t2 set p=p+3000, i=2 where a='qqqq';
|
|
select * from information_schema.key_caches where key_cache_name like "key%"
|
|
and segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
keycache1 7 NULL 262143 2048 25 # 0 2082 25 1071 19
|
|
set global keycache2.key_buffer_size=1024*1024;
|
|
cache index t2 in keycache2;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 assign_to_keycache status OK
|
|
insert into t2 values (2000, 3, 'yyyy');
|
|
select * from information_schema.key_caches where key_cache_name like "keycache2"
|
|
and segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
keycache2 NULL NULL 1048576 1024 6 # 0 6 6 3 3
|
|
select * from information_schema.key_caches where key_cache_name like "key%"
|
|
and segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
keycache1 7 NULL 262143 2048 25 # 0 2082 25 1071 19
|
|
keycache2 NULL NULL 1048576 1024 6 # 0 6 6 3 3
|
|
cache index t2 in keycache1;
|
|
Table Op Msg_type Msg_text
|
|
test.t2 assign_to_keycache status OK
|
|
update t2 set p=p+5000 where a='zzzz';
|
|
select * from t2 where p between 1010 and 1020;
|
|
p i a
|
|
1010 1 pppp
|
|
1011 1 yyyy
|
|
1014 1 pppp
|
|
1015 1 yyyy
|
|
1018 1 pppp
|
|
1019 1 yyyy
|
|
explain select p from t2 where p between 1010 and 1020;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 8 Using where; Using index
|
|
select p from t2 where p between 1010 and 1020;
|
|
p
|
|
1010
|
|
1011
|
|
1014
|
|
1015
|
|
1018
|
|
1019
|
|
explain select i from t2 where a='yyyy' and i=3;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 index_merge k1,k2 k1,k2 5,11 NULL 50 Using intersect(k1,k2); Using where; Using index
|
|
select i from t2 where a='yyyy' and i=3;
|
|
i
|
|
3
|
|
explain select a from t2 where a='yyyy' and i=3;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t2 index_merge k1,k2 k1,k2 5,11 NULL 50 Using intersect(k1,k2); Using where; Using index
|
|
select a from t2 where a='yyyy' and i=3 ;
|
|
a
|
|
yyyy
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache1 7 NULL 262143 2048 # # 0 3229 43 1594 30
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
set global keycache1.key_cache_block_size=2*1024;
|
|
insert into t2 values (7000, 3, 'yyyy');
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache1 7 NULL 262143 2048 # # 0 6 6 3 3
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
set global keycache1.key_cache_block_size=8*1024;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache1 3 NULL 262143 8192 # # 0 0 0 0 0
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
insert into t2 values (8000, 3, 'yyyy');
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache1 3 NULL 262143 8192 # # 0 6 5 3 3
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
set global keycache1.key_buffer_size=64*1024;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
set global keycache1.key_cache_block_size=2*1024;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache1 3 NULL 65535 2048 # # 0 0 0 0 0
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
set global keycache1.key_cache_block_size=8*1024;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
set global keycache1.key_buffer_size=0;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
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small NULL NULL 1048576 1024 # # 0 0 0 0 0
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keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
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set global keycache1.key_cache_block_size=8*1024;
|
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select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
set global keycache1.key_buffer_size=0;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
set global keycache1.key_buffer_size=128*1024;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache1 1 NULL 131072 8192 # # 0 0 0 0 0
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
set global keycache1.key_cache_block_size=1024;
|
|
select * from information_schema.key_caches where segment_number is null;
|
|
KEY_CACHE_NAME SEGMENTS SEGMENT_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES
|
|
default 2 NULL 32768 1024 # # 0 3172 24 1552 18
|
|
small NULL NULL 1048576 1024 # # 0 0 0 0 0
|
|
keycache1 7 NULL 131068 1024 # # 0 0 0 0 0
|
|
keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3
|
|
drop table t1,t2;
|
|
set global keycache1.key_buffer_size=0;
|
|
set global keycache2.key_buffer_size=0;
|
|
set global key_buffer_size=@save_key_buffer_size;
|
|
set global key_cache_segments=@save_key_cache_segments;
|
|
set global key_cache_file_hash_size=@save_key_cache_file_hash_size;
|
|
#
|
|
# SIGSEGV in flush_all_key_blocks when changing
|
|
# key_buffer_size / ASAN: heap-use-after-free in flush_all_key_blocks
|
|
#
|
|
SET GLOBAL keycache1.key_cache_segments=7;
|
|
SET GLOBAL keycache1.key_buffer_size=1*1024*1024;
|
|
SET GLOBAL keycache1.key_buffer_size=0;
|
|
SET GLOBAL keycache1.key_buffer_size=128*1024;
|
|
create table t1 (p int primary key, a char(10)) delay_key_write=1;
|
|
cache index t1 key (`primary`) in keycache1;
|
|
Table Op Msg_type Msg_text
|
|
test.t1 assign_to_keycache status OK
|
|
insert into t1 values (1, 'qqqq'), (11, 'yyyy');
|
|
select * from t1;
|
|
p a
|
|
1 qqqq
|
|
11 yyyy
|
|
drop table t1;
|
|
SET GLOBAL keycache1.key_buffer_size=0;
|
|
#
|
|
# End of 10.3 tests
|
|
#
|
|
ALTER DATABASE test CHARACTER SET utf8mb4 COLLATE utf8mb4_uca1400_ai_ci;
|