A logging method of reducing a log size by using a log entry when a log record is generated by an update, and an apparatus therefore, is provided. The method includes storing log information of a data page being updated; when the update of the data page is completed, reading the stored log information; generating a log record by using the read log information; and writing the generated log record in a log page. According to the method, the log size due to logging is reduced and the times of disk input and/or output operations decrease, thereby improving the updating speed of a database system.