Meeting Additional Logical-Log Backup Requirements (ON-Archive)
Use
You need to meet additional requirements for logical-log backup of your Informix database with
ON-Archive , but only if you are using the script logevent.sh for automatic logical-log backup. For more information, see Choosing Automatic Logical-Log Backup (ON-Archive).Procedure

To reduce the problem of the logical log filling up, define a large logical log (that is, greater than one GB) for automatic backup. Note also that you must always mirror the log.
For more information about using the script