aruis / mysql_vs_postgresql

mysql 8.0.22 vs postgresql 13.1 对比记录

MySQL 8.0.22 vs PostgreSQL 13.1

对比视频1：https://www.bilibili.com/video/BV1sU4y14741/

对比视频2：https://www.bilibili.com/video/BV1mf4y1k7mb/

MySQL 配置文件my.cnf

PostgreSQL 配置文件postgres.conf

机器：Macbook Air M1 16G+512G

建表语句

1. MySQL

create table log_access
(
    id                             varchar(40) default (uuid()) not null primary key,
    v_method                       varchar(10),
    v_uri                          varchar(200),
    v_ip                           varchar(15),
    i_status                       integer,
    v_type                         varchar(2),
    v_browser                      varchar(20),
    b_success                      boolean,
    v_application                  varchar(10),
    v_data_id                      varchar(80),
    v_alias_at_app_module          varchar(30),
    v_alias_at_app_module_function varchar(45),
    b_skip                         boolean,
    id_at_auth_user                varchar(40),
    t_create                       timestamp,
    v_body                         varchar(70),
    id_at_app_module               varchar(40),
    v_device                       varchar(10)
);

2. PostgreSQL

create table log_access
(
    id                             varchar default gen_random_uuid() not null primary key,
    v_method                       varchar,
    v_uri                          varchar,
    v_ip                           varchar,
    i_status                       integer,
    v_type                         varchar,
    v_browser                      varchar,
    b_success                      boolean,
    v_application                  varchar,
    v_data_id                      varchar,
    v_alias_at_app_module          varchar,
    v_alias_at_app_module_function varchar,
    b_skip                         boolean,
    id_at_auth_user                varchar,
    t_create                       timestamp,
    v_body                         varchar,
    id_at_app_module               varchar,
    v_device                       varchar
);

数据示例

id	v_method	v_uri	v_ip	i_status	v_type	v_browser	b_success	v_application	v_data_id	v_alias_at_app_module	v_alias_at_app_module_function	b_skip	id_at_auth_user	t_create	v_body	id_at_app_module	v_device
bba5ef6a_76cf_4811_a5dd_182ceaf51a15	GET	/api/platform/dictcategory/view/CARRIER_UNIT/children/app_dict	0:0:0:0:0:0:0:1	200	06	Chrome 8	true	platform	CARRIER_UNIT	dictcategory	view	true	b66f83d8_e87c_4fe9_bec6_357bd2e998bd	2020-12-02 16:10:56.629945	NULL	179b0a11_94c9_41bb_a788_79a99f6096e7	PC
648a04ca_8e13_4c63_9fea_8fa69308217c	GET	/api/szda/lendMnt/lendView	0:0:0:0:0:0:0:1	200	06	Chrome 8	true	szda	NULL	lendMnt	lendView	true	b66f83d8_e87c_4fe9_bec6_357bd2e998bd	2020-12-02 16:11:00.161490	NULL	53a8e8ee_98ee_4e32_8425_4042891d5b20	PC
d7fb3d8a_da8d_4699_8c54_e2a37329a128	GET	/api/szda/digitalArchive/detailView	0:0:0:0:0:0:0:1	200	06	Chrome 8	true	szda	NULL	digitalArchive	detailView	true	b66f83d8_e87c_4fe9_bec6_357bd2e998bd	2020-12-02 16:12:28.795853	NULL	457338e5_abe8_44fd_aa78_01f789e47289	PC
285077fc_0c4d_43bf_bf91_51dd4fb60bb9	GET	/api/msg/app/inBox/b66f83d8_e87c_4fe9_bec6_357bd2e998bd	0:0:0:0:0:0:0:1	200	06	Chrome 8	true	msg	b66f83d8_e87c_4fe9_bec6_357bd2e998bd	app	inBox	true	b66f83d8_e87c_4fe9_bec6_357bd2e998bd	2020-12-02 16:13:26.954893	NULL	NULL	PC
483e8486_c340_40f6_bc87_5ea7afa302aa	GET	/api/platform/dictcategory/view/SECRET_LEVEL/children/app_dict	0:0:0:0:0:0:0:1	200	06	Chrome 8	true	platform	SECRET_LEVEL	dictcategory	view	true	b66f83d8_e87c_4fe9_bec6_357bd2e998bd	2020-12-02 16:13:27.138294	NULL	179b0a11_94c9_41bb_a788_79a99f6096e7	PC

测试结果

1. 仅主键存在情况下，count(*)全表

   select count(*) from log_access;
   # 返回结果为128000000

   	时间
   MySQL	02:42
   PostgreSQL	01:37

2. 对v_method创建索引时间

   create index log_access_v_method_index  on log_access (v_method);
   

   	时间	索引大小
   MySQL	10:44	6722MB
   PostgreSQL	00:58	846MB

3. 有v_method索引后，count(*)全表

   select count(*) from log_access;
   # 返回结果为128000000

   	时间
   MySQL	02:41
   PostgreSQL	00:01.507

4. 有v_method索引后，对v_method加条件，再count(*)

   select count(*) from log_access where v_method = 'GET';
   # 返回结果为113032192

   	时间
   MySQL	19.72s
   PostgreSQL	1.39s

   select count(*) from log_access where v_method != 'GET';
   # 返回结果为14964736

   	时间
   MySQL	2.49s
   PostgreSQL	1.8s

   select count(*) from log_access where v_method not in ('GET', 'PUT');
   # 返回结果为14948608

   	时间
   MySQL	3.52s
   PostgreSQL	2.6s

   select * from log_access where v_method is null;

   	时间
   MySQL	0.9s
   PostgreSQL	0.19s

5. 创建组合索引

   create index log_access_v_method_i_status_v_device_index
       on log_access (v_method, i_status, v_device);

   	时间
   MySQL	13:24
   PostgreSQL	02:26

6. 对组合索引的使用

   select *
   from log_access
   where v_method = 'POST'
     and i_status = 516
     and v_device = 'Android';

   	时间
   MySQL	0.763s
   PostgreSQL	0.164s

   select *
   from log_access
   where i_status = 516
     and v_device = 'Android';

   	时间
   MySQL	385.9s
   PostgreSQL	1.0s

   select v_device, count(*)
   from log_access
   group by v_device;

   	时间
   MySQL	45s
   PostgreSQL	5s