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Populate DSSIZE for ALL pagesets to simplify monitoring and avoiding pageset full conditions
The rules surrounding the maximum size for any given pageset have become more and more complicated over recent releases of Db2. This severely affects our ability to monitor for pageset full conditions, as while it is relatively straight forward to calculate how much space is currently used/allocated, knowing what the maximum possible size is and therefore how much percentage-wise is currently utilized is extremely difficult to calculate given the number of permutations and rules.
For example, V12 now allows partition level DSSIZE, and we see that the size of a pageset for an index can depend now not only on the type of the associated tablespace but even differs if absolute or relative page numbering is used on that table space.
With DSSIZE populated consistently down to partition level then this process would be much simpler for all customers manage.
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