Pages may have data (txn, ts) associated with them that become globally visible over time. When this is the case, this data becomes useless but still takes up disk space. If those pages are never read back into the cache, this additional obsolete data will stay on disk forever which can have an impact on the cost.

This ticket should implement a way to read those pages back into memory so they can be evicted again without the obsolete time window information. To see how eviction cleans that obsolete data, please refer to WT-13092.