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52c29f3bdc
Heap tables are allocated blocks to store rows according to my_default_record_cache (mapped to the server global variable read_buffer_size). This causes performance issues when the record length is big (> 1000 bytes) and the my_default_record_cache is small. Changed to instead split the default heap allocation to 1/16 of the allowed space and not use my_default_record_cache anymore when creating the heap. The allocation is also aligned to be just under a power of 2. For some test that I have been running, which was using record length=633, the speed of the query doubled thanks to this change. Other things: - Fixed calculation of max_records passed to hp_create() to take into account padding between records. - Updated calculation of memory needed by heap tables. Before we did not take into account internal structures needed to access rows. - Changed block sized for memory_table from 1 to 16384 to get less fragmentation. This also avoids a problem where we need 1K to manage index and row storage which was not counted for before. - Moved heap memory usage to a separate test for 32 bit. - Allocate all data blocks in heap in powers of 2. Change reported memory usage for heap to reflect this. Reviewed-by: Sergei Golubchik <serg@mariadb.org>
81 lines
5.2 KiB
Text
81 lines
5.2 KiB
Text
SET sql_mode='';
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CREATE TEMPORARY TABLE t1 (a tinyINT,b CHAR(1)) ENGINE=InnoDB ROW_FORMAT=REDUNDANT;
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INSERT INTO t1 VALUES (1,1),(3,3),(2,2);
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SET SESSION tmp_table_size=True;
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Warnings:
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Warning 1292 Truncated incorrect tmp_table_size value: '1'
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CREATE TABLE t2 (c INT, d DATE) ENGINE=InnoDB PARTITION BY RANGE (YEAR (d)) SUBPARTITION BY HASH (TO_DAYS (d)) (PARTITION p0 VALUES LESS THAN (1990) (SUBPARTITION s0, SUBPARTITION s1), PARTITION p1 VALUES LESS THAN MAXVALUE (SUBPARTITION s4, SUBPARTITION s5));
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SET SESSION aria_sort_buffer_size=CAST(-1 AS UNSIGNED INT);
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Warnings:
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Note 1105 Cast to unsigned converted negative integer to it's positive complement
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Note 1105 Cast to unsigned converted negative integer to it's positive complement
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Warning 1292 Truncated incorrect aria_sort_buffer_size value: '18446744073709551615'
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INSERT INTO t1 SELECT '', SEQ FROM seq_1_to_258;
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Warnings:
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 1
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 2
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 3
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 4
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 5
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 6
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 7
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 8
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 9
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 10
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Warning 1265 Data truncated for column 'b' at row 10
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 11
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Warning 1265 Data truncated for column 'b' at row 11
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 12
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Warning 1265 Data truncated for column 'b' at row 12
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 13
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Warning 1265 Data truncated for column 'b' at row 13
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 14
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Warning 1265 Data truncated for column 'b' at row 14
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 15
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Warning 1265 Data truncated for column 'b' at row 15
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 16
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Warning 1265 Data truncated for column 'b' at row 16
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 17
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Warning 1265 Data truncated for column 'b' at row 17
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 18
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Warning 1265 Data truncated for column 'b' at row 18
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 19
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Warning 1265 Data truncated for column 'b' at row 19
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 20
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Warning 1265 Data truncated for column 'b' at row 20
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 21
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Warning 1265 Data truncated for column 'b' at row 21
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 22
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Warning 1265 Data truncated for column 'b' at row 22
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 23
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Warning 1265 Data truncated for column 'b' at row 23
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 24
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Warning 1265 Data truncated for column 'b' at row 24
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 25
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Warning 1265 Data truncated for column 'b' at row 25
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 26
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Warning 1265 Data truncated for column 'b' at row 26
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 27
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Warning 1265 Data truncated for column 'b' at row 27
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 28
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Warning 1265 Data truncated for column 'b' at row 28
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 29
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Warning 1265 Data truncated for column 'b' at row 29
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 30
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Warning 1265 Data truncated for column 'b' at row 30
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 31
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Warning 1265 Data truncated for column 'b' at row 31
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 32
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Warning 1265 Data truncated for column 'b' at row 32
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 33
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Warning 1265 Data truncated for column 'b' at row 33
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 34
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Warning 1265 Data truncated for column 'b' at row 34
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 35
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Warning 1265 Data truncated for column 'b' at row 35
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 36
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Warning 1265 Data truncated for column 'b' at row 36
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Warning 1366 Incorrect integer value: '' for column `test`.`t1`.`a` at row 37
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SET SESSION aria_repair_threads=4;
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UPDATE t1 SET a=( (SELECT MAX(a) FROM t1));
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drop table t1,t2;
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