If your server is running cPanel:
service chkservd stop
service mysql stop
cd /var/lib/mysql/
find . -type f | grep -i MYI|xargs myisamchk --fast --force --medium-check --backup --safe-recover --sort-index -O key_buffer=64M -O sort_buffer=64M -O read_buffer=1M -O write_buffer=1M -t /root/
service mysql start
service chkservd start
If your VPS is running Plesk:
service mysqld stop
cd /var/lib/mysql/
find . -type f | grep -i MYI|xargs myisamchk --fast --force --medium-check --backup --safe-recover --sort-index -O key_buffer=64M -O sort_buffer=64M -O read_buffer=1M -O write_buffer=1M -t /root/
service mysqld start
