I need experts opinion and guidance on performance enhancement of a Drupal 6 website which is hosted on a dedicated server.
We've already turned off Drupal's stats reporting to minimize the queries it fires on every request, we've also enabled advance caching in the performance configuration.
1. We've not use memcached earlier, if it is installed, do we have to change anything in our Drupal 6 installation?
2. After installing APC (PHP Acceleration) do we need to change anything in our Drupal 6 installation?
3. It's on MyISAM engine currently, what should be the right approach to switch to InnoDB?
4. We welcome all other suggestions to enhance the performance to handle the high traffic.