tmp_table_size usage

[Charles Kaminski]

Does the tmp_table_size option apply to all memory temporary tables (including the ones I create for a given connection using Create Temporary Table . . . Engine = Memory . . .) or does the option only apply to internal tables?

================ From MySql Administrator =============
Temporary table size - If an in-memory temporary table exceeds this size, MySQL will automatically convert it to an on-disk MyISAM table

================ From the Manual ======================
If an internal heap table exceeds the size of tmp_table_size, MySQL handles this automatically by changing the in-memory heap table to a disk-based MyISAM table as necessary. You can also increase the temporary table size by setting the tmp_table_size option to mysqld, or by setting the SQL option SQL_BIG_TABLES in the client program. See Section 13.5.3, “SET Syntax”.