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Currently BLU CDE tables only have the RECLAIM EXTENTS option of REORG enabled. This does not physically move rows and therefore REORG cannot reclaim extents unless 100% of the rows in an extent have been deleted (via deletes or BLU updates). Also, synopsis rows don't get removed unless every row in a range of 1024 rows have been deleted (or updated)
A manual work-around whereby "dummy updates" are performed on ranges of rows on the base table is possible, but is neither elegant or particularly efficient.
The preferred solution would be for REORG be extended to look for extents or TSN ranges that have a significant percent of deleted tuples. REORG should then move the remaining live rows to the end of the table, to allows those extents to be reclaimed and/or synopsis rows to be removed.
Note that Development (the DB2-CE CDE Storage team) have been involved in the PMR with comments in CRM / RCT.
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