| Log File  | 
Types of Information Logged to File  | 
| The error log  | 
Logs problems encountered starting, running, or stopping mysqld.  | 
| The isam log  | 
Logs all changes to the ISAM tables. Used only for debugging the isam code.  | 
| The query log  | 
Logs established client connections and executed statements.  | 
| The update log  | 
Logs statements that change data. This log is deprecated.  | 
| The binary log  | 
Logs all statements that change data. Also used for replication.  | 
| The slow log  | 
Logs all queries that took more than long_query_time seconds to execute or didn't use indexes.  |