Thank you both for your explanations. If there is no benefit by turning off
Index advisor other than elimination of update to sysixadv, it still makes
impact. Update of sysixadv is showing up in Top SQL list. I review top SQLs
by Total CPU time for the day and check whether any thing can be done to
remove these SQLs from the list. The improvement by removing one of these
SQLs from the list might be insignificant if viewed in isolation. If we
remove 100 such SQLs in a year, it will make a difference between healthy
database and poorly performing database.
IBM has a PTF to disable journaling on sysixadv. If journaling can be
disabled because it is unnecessary, why not provide option to disable the
update itself when it is unnecessary.
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