I was repairing this table suddenly server hanged and when I returned back all tables are ok but this one showing \'in use\' and when I try to repair it doesn\'t proceed.
I got myisamchk: error: myisam_sort_buffer_size is too small as error.
myisamchk: error: myisam_sort_buffer_size is too small
The solution
myisamchk -r -v mysql// --sort_buffer_size=2G