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# Create Table
CREATE TABLE t1 (
auditid VARCHAR(45) NOT NULL,
ip VARCHAR(39) NOT NULL DEFAULT '',
PRIMARY KEY (auditid)
) ENGINE=INNODB;
# Insert Values
INSERT INTO t1 VALUES
('abcdefghi', '1.1.1.1'),
('fghi', '192.168.1.1'),
('jklmnop', '2.2.2.2'),
('qrstu', '255.255.255.255'),
('uvwxyzabcde', '2001:db8::1');
# Create function for getting memory usage from perf schema
CREATE FUNCTION get_my_std_memory_usage() RETURNS INT READS SQL DATA
RETURN (
SELECT SUM_NUMBER_OF_BYTES_ALLOC
FROM performance_schema.memory_summary_global_by_event_name
WHERE EVENT_NAME = 'memory/innodb/std'
);
# Test 1. Check memory usage during create index
# Set the limit for memory usage
# Set Buffer Size
SET innodb_ddl_buffer_size = (4*1024*1024);
# Number of bytes allocated before create index
SET @before_memory = get_my_std_memory_usage();
# Create index
CREATE INDEX i1 ON t1(ip);
# Number of bytes allocated after create index
SET @after_memory = get_my_std_memory_usage();
# Bytes allocated in the process
SET @memory_diff = @after_memory - @before_memory;
include/assert.inc [Assert that memory usage is less than 4MB]
# Drop index
DROP INDEX i1 ON t1;
# Set Buffer Size
SET innodb_ddl_buffer_size = (8*1024*1024);
# Number of bytes allocated before create index
SET @before_memory = get_my_std_memory_usage();
# Create index
CREATE INDEX i1 ON t1(ip);
# Number of bytes allocated after create index
SET @after_memory = get_my_std_memory_usage();
# Bytes allocated in the process
SET @memory_diff = @after_memory - @before_memory;
include/assert.inc [Assert that memory usage is less than 4MB]
# Drop index
DROP INDEX i1 ON t1;
# Set Buffer Size
SET innodb_ddl_buffer_size = (16*1024*1024);
# Number of bytes allocated before create index
SET @before_memory = get_my_std_memory_usage();
# Create index
CREATE INDEX i1 ON t1(ip);
# Number of bytes allocated after create index
SET @after_memory = get_my_std_memory_usage();
# Bytes allocated in the process
SET @memory_diff = @after_memory - @before_memory;
include/assert.inc [Assert that memory usage is less than 4MB]
# Drop index
DROP INDEX i1 ON t1;
# Set Buffer Size
SET innodb_ddl_buffer_size = (32*1024*1024);
# Number of bytes allocated before create index
SET @before_memory = get_my_std_memory_usage();
# Create index
CREATE INDEX i1 ON t1(ip);
# Number of bytes allocated after create index
SET @after_memory = get_my_std_memory_usage();
# Bytes allocated in the process
SET @memory_diff = @after_memory - @before_memory;
include/assert.inc [Assert that memory usage is less than 4MB]
# Drop index
DROP INDEX i1 ON t1;
# Set Buffer Size
SET innodb_ddl_buffer_size = (64*1024*1024);
# Number of bytes allocated before create index
SET @before_memory = get_my_std_memory_usage();
# Create index
CREATE INDEX i1 ON t1(ip);
# Number of bytes allocated after create index
SET @after_memory = get_my_std_memory_usage();
# Bytes allocated in the process
SET @memory_diff = @after_memory - @before_memory;
include/assert.inc [Assert that memory usage is less than 4MB]
# Drop index
DROP INDEX i1 ON t1;
# Set Buffer Size
SET innodb_ddl_buffer_size = (128*1024*1024);
# Number of bytes allocated before create index
SET @before_memory = get_my_std_memory_usage();
# Create index
CREATE INDEX i1 ON t1(ip);
# Number of bytes allocated after create index
SET @after_memory = get_my_std_memory_usage();
# Bytes allocated in the process
SET @memory_diff = @after_memory - @before_memory;
include/assert.inc [Assert that memory usage is less than 4MB]
# Drop index
DROP INDEX i1 ON t1;
# Test 2. Test memory usage with minumum value of innodb_ddl_buffer_size
# and maximum value of --innodb_parallel_read_threads
SET innodb_ddl_buffer_size = 65536;
SET innodb_parallel_read_threads = 256;
# Number of bytes allocated before create index
SET @before_memory = get_my_std_memory_usage();
# Create index
CREATE INDEX i1 ON t1(ip);
# Number of bytes allocated after create index
SET @after_memory = get_my_std_memory_usage();
# Bytes allocated in the process
SET @memory_diff = @after_memory - @before_memory;
include/assert.inc [Assert that memory usage is less than 4MB]
# Drop index
DROP INDEX i1 ON t1;
# Test 3. Test memory usage with maximum value of innodb_ddl_buffer_size
# and minimum value of --innodb_parallel_read_threads
SET innodb_ddl_buffer_size = 4294967295;
SET innodb_parallel_read_threads = 1;
# Number of bytes allocated before create index
SET @before_memory = get_my_std_memory_usage();
# Create index
CREATE INDEX i1 ON t1(ip);
# Number of bytes allocated after create index
SET @after_memory = get_my_std_memory_usage();
# Bytes allocated in the process
SET @memory_diff = @after_memory - @before_memory;
include/assert.inc [Assert that memory usage is less than 4MB]
# Drop index
DROP INDEX i1 ON t1;
# Test 4. Test DB_OVERFLOW by setting tuple vector size to 2
# Set Buffer Size
SET innodb_ddl_buffer_size = (4*1024*1024);
SET innodb_parallel_read_threads = default;
# Create index
SET DEBUG = '+d, ddl_buf_add_two';
CREATE INDEX i1 ON t1(ip);
# The warning "InnoDB rebuilding table to add column FTS_DOC_ID" is expected
CREATE FULLTEXT INDEX i2 ON t1(ip);
Warnings:
Warning 124 InnoDB rebuilding table to add column FTS_DOC_ID
SET DEBUG = '-d, ddl_buf_add_two';
# Drop index
DROP INDEX i1 ON t1;
DROP INDEX i2 ON t1;
# Cleanup
DROP TABLE t1;
DROP FUNCTION get_my_std_memory_usage;
# Restart server to set parameters to default
# restart
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