I had to export mysql database using mysqldump for backup reasons.
To compare the size given by phpmyadmin, I downloaded the dump on my local machine then import the dump using SQLYog into a local database.
Now, when I compare the size given by phpmyadmin on my machine and the remote machine, I end up with the imported database on my local machine to be smaller than the one on the remote machine :
remote machine database size : 112,3 Mib
local machine database size : 95,7 Mib
I would like to know what could be the reasons for such a difference ?
Cheers
解决方案
112,3 Mio what? Rows? b?
If it’s storage size, there’s not much to worry about, it’s about how disk space usage is optimized (vacuum/optimize table).
http://dev.mysql.com/doc/refman/5.1/en/optimize-table.html
On the other hand if it’S rows, you’ll have to track down the tables that differ and figure out why.
use(replace schema name)
SELECT TABLE_NAME, table_rows, data_length, index_length,
round(((data_length + index_length) / 1024 / 1024),2) “Size in MB”
FROM information_schema.TABLES WHERE table_schema = “test”
union all
SELECT ‘total’, sum(table_rows), sum(data_length), sum(index_length),
sum(round(((data_length + index_length) / 1024 / 1024),2)) “Size in MB”
FROM information_schema.TABLES WHERE table_schema = “test” group by 1