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In current design, when SQL statement accesses a table, the compression and expansion dictionaries of that table will be read into DBHEAP and kept there until database deactivation. For column-based table, the memory consumption may up to 100MB. it's worse in DPF + BLU environment due to every related database partition need keep such info in its DBHEAP. So for a system with many tables, the customer either allocates huge memory for DBHEAP, or hits error and restart DB2 database. Hope to change the DBHEAP management method, let the DBHEAP memory could be reused.
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