At shutdown, all users must have exited their sessions; therefore, all transactions are committed. If users exited their sessions abnormally, the DBMS Server aborts any open transactions associated with the aborted sessions. Very long transactions take time to roll back and cause ingstop to seem to hang. The DBMS Server process cannot exit normally until it finishes recovering the aborted transactions.

If transactions are being rolled back on shutdown, allow the DBMS Server to finish this task before shutting down. If you do not, longer delays occur at startup time while the recovery process is performing rollback.