Technical Blog Post
Why do I see auto maintenance messages in the db2diag.log outside of policy windows ?
The auto maintenance messages with evaluation of reorg, runstats are logged in the db2diag.log every two hours. These are part of auto maintenance setup in the database.
Policy defined to run reorg or runstats during a certain maintenance window supposed to run reorg, runstats only during those time windows defined by the policies.
The real reorg or, runstats will follow the guideline defined by the auto maintenance policies. But, the evaluation of the same are not controlled by the policy definitions.
So, it's expected to find the evaluation messages showing up in the db2diag.log outside of the maintenance windows defined by the policies. But, the real reorg or runstats will only run during the time windows defined by the policies.