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Population of V12 new added Catalog columns during activation of Function level V12R1M50 and avoid it later during executions of ALTER TABLESPACE because of contention of packages.
After you apply the PTF for APAR PI86123, the first ALTER TABLESPACE, populates any null attributes for objects created in function level V12R1M100 or earlier.
When the one-time population occurs for an ALTER TABLESPACE statement, Db2 must quiesce dependent packages to complete this operation, and you might encounter SQLCODEs -904, -911, or -913 for dependent packages.
In our installation, this has caused a full transactional disaster (Reported in case TS008017044). Por this cause, we propose a Jobname which could be executed during activation of Function level V12R1M500, the one which would trigger instead the population of all those V12 new added Catalog columns and avoid it later during executions of ALTER TABLESPACE that population would require quiesce of dependent Packages (and so obtention of X-locks on the SKPTs of those dependent Packages).
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