Comments - mysqld fills /tmp with file /tmp/#sql_26be_0.MAD
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Hello.
When you run certain ALTER or CREATE commands on an InnoDB table, a temporary table is created in mysql's tmpdir during the operation.The default value in my.cnf is /tmp.
When you are loading the data, /tmp is being filled. I would suggest you change the value of tmpdir in my.cnf to be on a disk with more space. Stop mysql first, change the value in my.cnf and start mysql.
Check the tmpdir value is correct by running:
show variables like "tmpdir";
then try loading your data.
If the value is not as you set it in my.cnf, make sure you have it in the correct section, [mysqld] or [mysqld-safe]