MySQL 5.6 插入缓冲测试

2019-05-25 19:28:24 浏览数 (1)

设置

代码语言:javascript复制
autocommit = off
innodb_flush_log_at_trx_commit = 0
innodb_buffer_pool_size = 134217728
innodb_change_buffer_max_size = 25
innodb_change_buffering = all

建表

代码语言:javascript复制
create table t1 (id int auto_increment not null primary key, name varchar(30), key(name)) engine=innodb;

插入数据

代码语言:javascript复制
delimiter //
CREATE PROCEDURE p1 (n int)
BEGIN
  SET @x = 0;
  WHILE @x < n DO
    INSERT INTO t1 (NAME)
      VALUES (FLOOR(1   RAND() * (n - 1)));
    SET @x = @x   1;
  END WHILE;
  COMMIT;
END;
//

delimiter ;

call p1 (10000000);

Query OK, 0 rows affected (8 min 23.79 sec)

查看插入缓冲状态

代码语言:javascript复制
show engine innodb statusG
......
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 3081, seg size 3083, 50425 merges
merged operations:
 insert 2481177, delete mark 0, delete 0
discarded operations:
 insert 0, delete mark 0, delete 0
Hash table size 276671, node heap has 1 buffer(s)
0.00 hash searches/s, 2902.60 non-hash searches/s
......

说明:

插入1000万条记录 执行时间:8 min 23.79 sec 当前插入缓冲的大小为:3083 * 16K 合并次数:50425 执行insert操作数:2481177

对比测试:

设置

代码语言:javascript复制
autocommit = off
innodb_flush_log_at_trx_commit = 0
innodb_buffer_pool_size = 134217728
innodb_change_buffer_max_size = 25
innodb_change_buffering = none

call p1 (10000000);

Query OK, 0 rows affected (22 min 18.85 sec) 查看插入缓冲状态

代码语言:javascript复制
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 3081, seg size 3083, 0 merges
merged operations:
 insert 0, delete mark 0, delete 0
discarded operations:
 insert 0, delete mark 0, delete 0
Hash table size 276707, node heap has 1 buffer(s)
0.00 hash searches/s, 0.00 non-hash searches/s

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