I'm trying to discover how I can reduce the redundant logs (PHP errors, Drupal messages, debug logs, whatever) that are stored in Drupal's database and in Apache's log folders. I'm primarily a designer, certainly not a sysadmin, but I'd like to use whatever logging methods are most efficient, from a performance perspective as well as a disk space perspective.
I'm not sure if it is relevant to this issue, but I am using Drupal 6.
Is there anywhere I can find an ideal configuration for what to log on which of the two systems? If not, how can I find out exactly what is being logged in which locations, and how to turn off one or the other?