Several types of log publishers can be used to log processing information about the server, including:

Audit loggers
Provide information about actions that occur within the server. Specifically, this type of log records all changes applied, detected or failed; dropped operations that were not completed; changes dropped due to being out of scope, or no changes needed for an operation. The log also shows the entries that were involved in a process.
Error loggers
Provide information about warnings, errors, or significant events that occur within the server.
Debug loggers
Provide detailed information about processing performed by the server, including any exceptions caught during processing, detailed information about data read from or written to clients, and accesses to the underlying database.
Access loggers
Provide information about LDAP operations processed within the server. This log only applies to operations performed in the server. This includes configuration changes, searches of monitor data, and bind operations for authenticating administrators using the command-line tools and the Administrative Console.