When I alter or repair a myisam table, it creates a temporary file in

Question

Asked: June 1, 20262026-06-01T02:16:09+00:00 2026-06-01T02:16:09+00:00

When I alter or repair a myisam table, it creates a temporary file in the same directory as of data directory.
How do I make it use /tmp directory?

I do not have enough space on the partition where the data directory is located.

Update:

The last line of this page reads:
ALTER TABLE creates a temporary table in the same directory as the original table.

Repair table has an option but it does not work.

This seems to be a bug.

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Editorial Team · Answer 1 · 2026-06-01T02:16:10+00:00

Editorial Team

Usually mysql uses the TMPDIR environment variable or a system default.

See also the documentaion on temporary-files

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