How to find current size (in memory) of table in MySQL?
To get the current size of a table, use the following that will display details about a table including the size −
show table status like ‘yourTableName’\G
Let us first create a table −
mysql> create table DemoTable
-> (
-> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
-> CustomerName varchar(20),
-> CustomerAge int,
-> CustomerCountryName varchar(20)
-> );
Query OK, 0 rows affected (0.75 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(CustomerName,CustomerAge,CustomerCountryName) values('John',24,'US');
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable(CustomerName,CustomerAge,CustomerCountryName) values('Carol',22,'UK');
Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
+----+--------------+-------------+---------------------+
| Id | CustomerName | CustomerAge | CustomerCountryName |
+----+--------------+-------------+---------------------+
| 1 | John | 24 | US |
| 2 | Carol | 22 | UK |
+----+--------------+-------------+---------------------+
2 rows in set (0.00 sec)
Here is the query to find current size (in memory) of a table −
mysql> show table status like 'DemoTable'\G
Output
*************************** 1. row ***************************
Name: DemoTable
Engine: InnoDB
Version: 10
Row_format: Dynamic
Rows: 0
Avg_row_length: 0
Data_length: 16384
Max_data_length: 0
Index_length: 0
Data_free: 0
Auto_increment: NULL
Create_time: 2019-06-10 16:35:55
Update_time: NULL
Check_time: NULL
Collation: utf8_unicode_ci
Checksum: NULL
Create_options:
Comment:
1 row in set (0.01 sec)
Published on 09-Jul-2019 16:14:09
