UR CHECK FREQ field (URCHKTH subsystem parameter)

Unless the option is disabled, DB2® issues a warning message to the console for an uncommitted unit of recovery (UR) after a certain number of checkpoint cycles. The URCHKTH subsystem parameter specifies the number of checkpoint cycles that are to complete before DB2 issues the warning message.

Acceptable values: 0 to 255
Default: Start of change5End of change
Update: Start of changeoption 28 on panel DSNTIPBEnd of change
DSNZPxxx: DSN6SYSP URCHKTH

This option does not affect performance. If you use this option, specify a value that is based on how often a checkpoint occurs in your system and how much time you can allow for a restart or shutdown. For example, if your site's checkpoint interval is 5 minutes and the standard limit for issuing commits with units of recovery is 20 minutes, divide 20 by 5 to determine the best value for your system.