Hi! Here is a patch that should fix your myisamchk issues. This is to be applied to MariaDB 5.5.30 source. Can you verify that this works so I can add it to MariaDB 10.0 ? Some notes: - If you run repair with two --force options, like this: myisamchk --repair --force --force ... Then myisamchk will use the full myisam_sort_buffer_size for keys. Other buffers will be allocated as needed. This means that with this option one will never get the "myisam_sort_buffer_size is too small" error. I also added the option --create-missing-keys, which will create keys just for any disabled keys. Other things: - Better error message for 'myisam_sort_buffer_size is too small' errors. - Somewhat larger buffers as default. - Changed a lot of variables from uint -> ulonglong to try to ensure that big files will not cause any problems. - Removed some checks that limited the sort_buffer_size to 4G. - Fixed code that would cause problems if sort_buffer_size would be > 8G - Fixed printing of longlong variables. - Fixed possible core dump if 'alloc_dynamic()' would fail. - Fixed some possible problems on system where uint would be <= ulong. Hope this helps! Regards, Monty