Modifying the Log-File Rollover Period

Date Pattern	Rollover Time
'.'yyyy-MM	At the beginning of each month For example, for the _full_.log if you set the DatePattern to ‘.’yyyy-MM, at midnight on January 31, 2010, My webMethods Server copies the log data to the file _full_.2010-01.log. My webMethods Server logs messages for the month of February to the _full_.log file until it is rolled over the next month.
'.'yyyy-ww	At the first day of each week. The first day of the week depends on the locale. For example, assume the first day of the week is Sunday and that for the _problems_.log you set the DatePattern to '.'yyyy-ww. On Saturday midnight, May 15, 2010, My webMethods Server copies the log data for the 19th week of the year to the file _problems_2010-19. My webMethods Server logs messages for the 20th week of 2010 to the _problems_.log file until it is also rolled over the next week.
'.'yyyy-MM-dd	At midnight each day. For example, for the _full_.log if you set the DatePattern to '.'yyyy-MM-dd, at midnight on February 22, 2010, My webMethods Server copies the log data to the file _full_2010-02-22. My webMethods Server logs messages for February 23, 2010 to the _full_.log file until it is also rolled over the next day.
'.'yyyy-MM-dd-a	Twice each day, at noon and midnight. For example, for the _problems_.log if you set the DatePattern to '.'yyyy-MM-dd-a, at noon on February 22, 2010, My webMethods Server copies the log data to the file _problems_2010-02-22-A.M. My webMethods Server logs messages for the afternoon of February 22, 2010 to the _problems_.log file until it is rolled over at midnight into the file _problems_2010-02-22-P.M. Then, My webMethods Server logs messages for February 23, 2010 to the _problems_.log file.
'.'yyyy-MM-dd-HH	Every hour of each day. For example, for the _full_.log if you set the DatePattern to '.'yyyy-MM-dd-HH, at approximately 11:00 A.M. on February 22, 2010, My webMethods Server copies the log data for the 10 o’clock hour to the file _full_2010-02-22-10. My webMethods Server logs messages for the 11 o’clock hour to the _full_.log file until it is rolled over at the beginning of the next hour.
'.'yyyy-MM-dd-HH-mm	Every minute of each day. For example, for the _full_.log if you set the DatePattern to '.'yyyy-MM-dd-HH-mm, at approximately 11:46 A.M. on February 22, 2010, My webMethods Server copies the log data to the file _full_2010-02-22-11-45. My webMethods Server logs messages for the next minute to the _full_.log file until it is rolled over a minute later.

Note:
The following procedure describes how to modify the roll over periods by updating parameters for the default appenders (org.apache.log4j.DailyRollingFileAppender and org.apache.log4j.RollingFileAppender) that are defined out-of-the-box. However, if you want, you can update the settings to use an alternative appender to meet your needs. For example, you can change the _problems_.log to use the RollingFileAppender if you want it to roll over based on size or FileAppender if you do not want the log to roll over. You can use any appender that log4j library supports. For more information, see http://logging.apache.org/log4j/1.2/index.html.