Mysql使用中的性能优化——索引数对插入操作性能的影响

breaksoftware2024-06-14 9:11

表的索引可以给数据检索提升效率，但是也给表的增删改操作带来代价。本文我们将关注，索引数量对INSERT操作的影响。

结论

索引数的新增会造成INSERT操作效率下降，约每增一个索引会降低10%效率。

实验数据

可以看到0个索引的效率是7个索引效率的一倍。

测试环境

见《Mysql使用中的性能优化------搭建Mysql的监测服务》

测试代码

sql 复制代码 
DROP DATABASE IF EXISTS testdb;
CREATE DATABASE IF NOT EXISTS testdb;
USE testdb;

DROP TABLE IF EXISTS test_insert_src;
CREATE TABLE test_insert_src (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_0_index;
CREATE TABLE test_insert_0_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_1_index;
CREATE TABLE test_insert_1_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32))
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_2_index;
CREATE TABLE test_insert_2_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32)),
    INDEX name1_index (name1(32))
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_3_index;
CREATE TABLE test_insert_3_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32)),
    INDEX name1_index (name1(32)),
    INDEX name2_index (name2(32))
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_4_index;
CREATE TABLE test_insert_4_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32)),
    INDEX name1_index (name1(32)),
    INDEX name2_index (name2(32)),
    INDEX name3_index (name3(32))
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_5_index;
CREATE TABLE test_insert_5_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32)),
    INDEX name1_index (name1(32)),
    INDEX name2_index (name2(32)),
    INDEX name3_index (name3(32)),
    INDEX name4_index (name4(32))
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_6_index;
CREATE TABLE test_insert_6_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32)),
    INDEX name1_index (name1(32)),
    INDEX name2_index (name2(32)),
    INDEX name3_index (name3(32)),
    INDEX name4_index (name4(32)),
    INDEX name5_index (name5(32))
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_7_index;
CREATE TABLE test_insert_7_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32)),
    INDEX name1_index (name1(32)),
    INDEX name2_index (name2(32)),
    INDEX name3_index (name3(32)),
    INDEX name4_index (name4(32)),
    INDEX name5_index (name5(32)),
    INDEX name6_index (name6(32))
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_8_index;
CREATE TABLE test_insert_8_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32)),
    INDEX name1_index (name1(32)),
    INDEX name2_index (name2(32)),
    INDEX name3_index (name3(32)),
    INDEX name4_index (name4(32)),
    INDEX name5_index (name5(32)),
    INDEX name6_index (name6(32)),
    INDEX name7_index (name7(32))
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_9_index;
CREATE TABLE test_insert_9_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32)),
    INDEX name1_index (name1(32)),
    INDEX name2_index (name2(32)),
    INDEX name3_index (name3(32)),
    INDEX name4_index (name4(32)),
    INDEX name5_index (name5(32)),
    INDEX name6_index (name6(32)),
    INDEX name7_index (name7(32)),
    INDEX name8_index (name8(32))
) engine=InnoDB;

DROP TABLE IF EXISTS test_insert_10_index;
CREATE TABLE test_insert_10_index (
    id SERIAL PRIMARY KEY,
    name TEXT,
    name1 TEXT,
    name2 TEXT,
    name3 TEXT,
    name4 TEXT,
    name5 TEXT,
    name6 TEXT,
    name7 TEXT,
    name8 TEXT,
    name9 TEXT,
    INDEX name_index (name(32)),
    INDEX name1_index (name1(32)),
    INDEX name2_index (name2(32)),
    INDEX name3_index (name3(32)),
    INDEX name4_index (name4(32)),
    INDEX name5_index (name5(32)),
    INDEX name6_index (name6(32)),
    INDEX name7_index (name7(32)),
    INDEX name8_index (name8(32)),
    INDEX name9_index (name9(32))
) engine=InnoDB;

DROP PROCEDURE IF EXISTS test_insert_proc_batch_bulk;
DELIMITER //
CREATE PROCEDURE test_insert_proc_batch_bulk(IN name TEXT, IN fromNum INT, IN toNum INT)
BEGIN
    DECLARE i INT DEFAULT fromNum;
    DECLARE j INT DEFAULT 0;
    DECLARE new_names TEXT DEFAULT '';
    DECLARE nameList TEXT DEFAULT '';
    SET @sql = 'INSERT INTO test_insert_src (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) VALUES ';
    WHILE i < toNum DO
        SET nameList = '';
        SET j = 0;
        while j < 10 DO
            SET new_names = CONCAT(name, i, "_", j);
            IF j = 0 THEN
                SET nameList = CONCAT(nameList, '"', new_names, '"');
            ELSE
                SET nameList = CONCAT(nameList, ',"', new_names, '"');
            END IF;
            SET j = j + 1;
        END WHILE;
        SET i = i + 1;
        SET @sql = CONCAT(@sql, '(', nameList, '),');
    END WHILE;
    SET @sql = LEFT(@sql, LENGTH(@sql) - 1);
    PREPARE stmt FROM @sql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
    COMMIT;
END //
DELIMITER ;

DROP PROCEDURE IF EXISTS test_insert_proc_batch;
DELIMITER //
CREATE PROCEDURE test_insert_proc_batch(IN name TEXT, IN count INT, IN step INT)
BEGIN
    DECLARE i INT DEFAULT 0;
    WHILE i < count DO
        CALL test_insert_proc_batch_bulk(name, i, i + step);
        SET i = i + step;
    END WHILE;
    COMMIT;
END //
DELIMITER ;

TRUNCATE TABLE test_insert_src;
CALL test_insert_proc_batch('test', 1000000, 5000);

TRUNCATE TABLE test_insert_0_index;
INSERT INTO test_insert_0_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;  

TRUNCATE TABLE test_insert_1_index;
INSERT INTO test_insert_1_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;

TRUNCATE TABLE test_insert_2_index;
INSERT INTO test_insert_2_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;

TRUNCATE TABLE test_insert_3_index;
INSERT INTO test_insert_3_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;

TRUNCATE TABLE test_insert_4_index;
INSERT INTO test_insert_4_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;

TRUNCATE TABLE test_insert_5_index;
INSERT INTO test_insert_5_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;

TRUNCATE TABLE test_insert_6_index;
INSERT INTO test_insert_6_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;

TRUNCATE TABLE test_insert_7_index;
INSERT INTO test_insert_7_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;

TRUNCATE TABLE test_insert_8_index;
INSERT INTO test_insert_8_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;

TRUNCATE TABLE test_insert_9_index;
INSERT INTO test_insert_9_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;

TRUNCATE TABLE test_insert_10_index;
INSERT INTO test_insert_10_index (name, name1, name2, name3, name4, name5, name6, name7, name8, name9) SELECT name, name1, name2, name3, name4, name5, name6, name7, name8, name9 FROM test_insert_src;
相关推荐
木头左15 小时前
【架构设计】教育类 App 服务端化改造：AI 上移、题库分层与个人题库归属
android·架构设计·系统设计·后端开发·数据库设计
墨狂之逸才16 小时前
USB 的 HOST 和 DEVICE 到底有什么区别？ADB 调试应该选哪个？
android
.痞老板.17 小时前
mysql初阶--数据库设计
数据库·mysql·oracle
奶油话梅糖17 小时前
苹果的内核跑上了安卓手机：2,631 Star 的 HakiOS 让 XNU 在 Adreno GPU 上画出 118 帧
android·macos·智能手机
恋猫de小郭17 小时前
Flutter THLC 的 WebView 滚动终于从 70 FPS 提升到 120 FPS
android·前端·flutter
Decay__18 小时前
SQL Server 数据库全栈运维实战系列 — 合集索引（24 篇）
运维·数据库·sql·mysql·架构
Thanks_ks19 小时前
SQL 的 GROUP BY 与聚合函数：从会写 SELECT 到会做统计
数据库·sql·mysql·group by·数据统计·聚合函数·having
Decay__1 天前
12_MySQL InnoDB 内存与锁调优 —— Buffer Pool、redo log、隔离级别与锁等待
运维·数据库·sql·mysql·架构
好的佩奇1 天前
Dart 之扩展类型
android·flutter·dart
alexhilton1 天前
2027 Android 开发者路线图：学习、面试与 AI
android·kotlin·android jetpack
热门推荐
01国内可直接用、免费额度/永久免费的大模型API清单（含 SiliconFlow、火山、阿里、智谱、百度、Kimi、DeepSeek、DMXAPI 等）02历年考研数学一、数学二、数学三真题试卷及答案PDF03如何新建文件夹？ 电脑新建文件夹的4种方法04几个好用的ip纯净度检测网站05GitHub 镜像站点06微信历史版本含下载地址（ Windows PC | 安卓 | MAC ）及设置微信不更新07苹果iPA游戏软件资源下载网站08昇腾910B系列芯片完全指南：四款型号对比、服务器选型与大模型部署实战09蜘蛛磁力 搜索引擎大全，如何使用蜘蛛磁力查找磁力链接10【SQL Server 2022】保姆级SQL Server 详细图文下载安装教程