Temporary tables show you how many temporary files are created in the disk because they couldn't be set in memory. To show them, you can use the global status information:
MariaDB [(none)]> show global status like 'Created_tmp%'; +-------------------------+--------+ | Variable_name | Value | +-------------------------+--------+ | Created_tmp_disk_tables | 13363 | | Created_tmp_files | 6 | | Created_tmp_tables | 107681 | +-------------------------+--------+ 3 rows in set (0.00 sec)
You can see all the temporarily created disk tables, files, and tables here. Here is a description of them to better understand how they work:
Created_tmp_disk_tables: This value should stay at0instead of gettingBLOBorTEXTcolumns in your databases. They are used when the in-memory tables become too large.Created_tmp_files: This is how many temporary files were created. WhenCreated_tmp_disk_tablesis not enough, disk files are created, and the counter increments...