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e581396b7a
Before commit6112853cdain MySQL 4.1.1 introduced the parameter innodb_file_per_table, all InnoDB data was written to the InnoDB system tablespace (often named ibdata1). A serious design problem is that once the system tablespace has grown to some size, it cannot shrink even if the data inside it has been deleted. There are also other design problems, such as the server hang MDEV-29930 that should only be possible when using innodb_file_per_table=0 and innodb_undo_tablespaces=0 (storing both tables and undo logs in the InnoDB system tablespace). The parameter innodb_change_buffering was deprecated in commitb5852ffbee. Starting with commitbaf276e6d4(MDEV-19229) the number of innodb_undo_tablespaces can be increased, so that the undo logs can be moved out of the system tablespace of an existing installation. If all these things (tables, undo logs, and the change buffer) are removed from the InnoDB system tablespace, the only variable-size data structure inside it is the InnoDB data dictionary. DDL operations on .ibd files was optimized in commit86dc7b4d4c(MDEV-24626). That should have removed any thinkable performance advantage of using innodb_file_per_table=0. Since there should be no benefit of setting innodb_file_per_table=0, the parameter should be deprecated. Starting with MySQL 5.6 and MariaDB Server 10.0, the default value is innodb_file_per_table=1.
56 lines
2.6 KiB
Text
56 lines
2.6 KiB
Text
set global innodb_compression_algorithm = 1;
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create database enctests;
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use enctests;
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create table t1(a int not null primary key, b char(200)) engine=innodb;
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create table t2(a int not null primary key, b char(200)) engine=innodb row_format=compressed;
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create table t3(a int not null primary key, b char(200)) engine=innodb page_compressed=yes;
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create table t4(a int not null primary key, b char(200)) engine=innodb encrypted=yes;
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create table t5(a int not null primary key, b char(200)) engine=innodb encrypted=yes row_format=compressed;
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create table t6(a int not null primary key, b char(200)) engine=innodb encrypted=yes page_compressed=yes;
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create table t7(a int not null primary key, b char(200)) engine=innodb encrypted=no;
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create table t8(a int not null primary key, b char(200)) engine=innodb encrypted=no row_format=compressed;
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create table t9(a int not null primary key, b char(200)) engine=innodb encrypted=no page_compressed=yes;
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insert into t1 values (1, 'secredmessage');
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insert into t2 values (1, 'secredmessage');
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insert into t3 values (1, 'secredmessagecompressedaaaaaaaaabbbbbbbbbbbbbbccccccccccccccc');
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insert into t4 values (1, 'secredmessage');
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insert into t5 values (1, 'secredmessage');
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insert into t6 values (1, 'secredmessagecompressedaaaaaaaaabbbbbbbbbbbbbbccccccccccccccc');
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insert into t7 values (1, 'publicmessage');
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insert into t8 values (1, 'publicmessage');
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insert into t9 values (1, 'pugliccompressedaaaaaaaaabbbbbbbbbbbbbbccccccccccccccc');
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# should list tables t1-t6
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SELECT NAME,ENCRYPTION_SCHEME,CURRENT_KEY_ID FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0 AND NAME LIKE 'enctests%';
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NAME ENCRYPTION_SCHEME CURRENT_KEY_ID
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enctests/t1 1 1
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enctests/t2 1 1
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enctests/t3 1 1
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enctests/t4 1 1
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enctests/t5 1 1
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enctests/t6 1 1
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# should list tables t7-t9
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SELECT NAME,ENCRYPTION_SCHEME,CURRENT_KEY_ID FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION = 0 and NAME LIKE 'enctests%';
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NAME ENCRYPTION_SCHEME CURRENT_KEY_ID
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enctests/t7 0 1
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enctests/t8 0 1
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enctests/t9 0 1
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# t1 default on expecting NOT FOUND
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NOT FOUND /secred/ in t1.ibd
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# t2 default on expecting NOT FOUND
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NOT FOUND /secred/ in t2.ibd
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# t3 default on expecting NOT FOUND
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NOT FOUND /secred/ in t3.ibd
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# t4 on expecting NOT FOUND
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NOT FOUND /secred/ in t4.ibd
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# t5 on expecting NOT FOUND
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NOT FOUND /secred/ in t5.ibd
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# t6 on expecting NOT FOUND
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NOT FOUND /secred/ in t6.ibd
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# t7 off expecting FOUND
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FOUND 1 /public/ in t7.ibd
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# t8 row compressed expecting NOT FOUND
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FOUND 1 /public/ in t8.ibd
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# t9 page compressed expecting NOT FOUND
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NOT FOUND /public/ in t9.ibd
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# restart
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drop database enctests;
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