Although IBM improves the DB2 CANCEL command with each release, cases remain where DB2 CANCEL doesn't work. When threads fail to respond to normal DB2 cancellation processing, Thread/SERIES can issue DB2, z/OS, TCP/IP, SNA/VTAM, IMS and/or CICS commands -- separately or in combination -- to escalate the cancel and terminate the thread. For example, DB2 marks inactive database access threads (DBATs) as cancelled, but cancellation is actually deferred until the thread becomes active again. When necessary, Thread/SERIES can DROP the communication connections which underlie the thread and remove the thread right away.
by CarlFeinberg » Sun Dec 06, 2009 10:19 am
Description and discussion of various DB2/z thread management issues
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CarlFeinberg
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