How does Mysql view the database size

This article introduces Mysql how to view the database size, the content is very detailed, interested friends can refer to reference, I hope to help you.

1 Command line access to database

[root@80 ~]# mysql -uroot -pEnter password:

2 View database

mysql> show databases;+--------------------+| Database |+--------------------+| information_schema || mysql || test |+--------------------+

3 View "TABLES" for information_schema

mysql> use information_schema;| TABLES |

4 View field structure

mysql> desc tables;+-----------------+---------------------+------+-----+---------+-------+| Field | Type | Null | Key | Default | Extra |+-----------------+---------------------+------+-----+---------+-------+| TABLE_CATALOG | varchar(512) | NO | | | || TABLE_SCHEMA | varchar(64) | NO | | | || TABLE_NAME | varchar(64) | NO | | | || TABLE_TYPE | varchar(64) | NO | | | || ENGINE | varchar(64) | YES | | NULL | || VERSION | bigint(21) unsigned | YES | | NULL | || ROW_FORMAT | varchar(10) | YES | | NULL | || TABLE_ROWS | bigint(21) unsigned | YES | | NULL | || AVG_ROW_LENGTH | bigint(21) unsigned | YES | | NULL | || DATA_LENGTH | bigint(21) unsigned | YES | | NULL | || MAX_DATA_LENGTH | bigint(21) unsigned | YES | | NULL | || INDEX_LENGTH | bigint(21) unsigned | YES | | NULL | || DATA_FREE | bigint(21) unsigned | YES | | NULL | || AUTO_INCREMENT | bigint(21) unsigned | YES | | NULL | || CREATE_TIME | datetime | YES | | NULL | || UPDATE_TIME | datetime | YES | | NULL | || CHECK_TIME | datetime | YES | | NULL | || TABLE_COLLATION | varchar(32) | YES | | NULL | || CHECKSUM | bigint(21) unsigned | YES | | NULL | || CREATE_OPTIONS | varchar(255) | YES | | NULL | || TABLE_COMMENT | varchar(2048) | NO | | | |+-----------------+---------------------+------+-----+---------+-------+

5 View DB data size

mysql> select table_schema,round(sum(DATA_LENGTH)/1024/1024,2) as table_size from tables group by table_schema;+--------------------+------------+| table_schema | table_size |+--------------------+------------+| bomo_backend | 0.09 || test1 | 234.16 || test2 | 0.17 || information_schema | 0.00 || mysql | 0.71 || performance_schema | 0.00 || test | 0.03 |+--------------------+------------+

6 View table data size

mysql> select table_schema,table_name,concat(round(data_length/1024/1024,2),'M') as table_size from tables where table_schema = 'grab';+--------------+--------------+------------+| table_schema | table_name | table_size |+--------------+--------------+------------+| grab | product | 215.12M || grab | result | 13.52M || grab | rule | 0.02M || grab | task | 5.52M |+-------------- If you think the article is good, you can share it so that more people can see it.