I have set up my site locally on XAMPP webserver and am using MyISAM MySQL database. The website runs using Symfony 1.0.6. When I try to run it in a browser, the MySQL server is reallly very slow and due to this, often results in SQLException errors. I have enabled the query caching and set the query_cache_size to <85 mb>, but still no use. Can you suggest some ways to improve the performance?