Change repository purging options. 
    
Task
            As you decide how to purge your repository, consider that:  
- Purging keeps the repository from absorbing too much disk space.
 
- By default, purging is  enabled. It occurs once a day and purges data older than one day. 
 
- Statistics and alert history can help you detect trends in
                        server performance and user behavior. The
                            Sybase Control Center statistics chart can graph
                        performance data over a period of a year or more if the data is available.
                        If you have enough disk space, consider saving data for a longer period of
                        time or disabling the purging of statistics or alert history.
 
- Changing the purge frequency and other options might affect
                            Sybase Control Center performance.
 
             
            Note: If you configure purging as part of a scheduled backup of the repository, disable automatic purging on the Size Management tab.