As part of managing cache structure resources, you can mark specified data items as recently referenced so that the system moves the data entry to the “recently referenced” end of the storage class queue. When you issue PROCESS_REFLIST for a data item, the system can consider the resources allocated to the data item for reclaim depending on the position of the data entry for the data item on the storage class queue. The system considers data entries that are less recently referenced as more likely candidates for reclaim than data entries that are marked as more recently referenced. (Of course, any data item that is marked as changed is NOT considered for reclaim.) For more information on how the referenced/unreferenced state of a data item affects reclaim, see Managing Storage Reclaim for Specific Data Items.

You can use PROCESS_REFLIST as follows. As you reference data items in your local buffer over time, you can include them in a list of data items that you want to mark as recently referenced. Then, you can periodically issue PROCESS_REFLIST to allow the system to mark the data items in the list as recently referenced and move them to the end of the recently referenced storage queue so that the cache resources for these data items are less likely to be reclaimed.

To mark one or more data items as recently referenced, issue an IXLCACHE REQUEST=PROCESS_REFLIST request.