title: Mysql (Myisam) variable setting
body: <p>I have a single processor dedicated server with 4GB RAM and a 400MB Mysql database (Myisam) who has big performance problems.
  The database is used by an ecommerce.
  I already tryied to tune it using the mysqltuner script, but without good results.
  Because the variable settings have been modified several times, I would like to have a basic configuration to start from, thereafter try to tune it.</p>