You are under tremendous pressure. It was working yesterday, does not work today, and nothing was changed (or at least nobody admits to it).

Database Operations Crisis Checklist:

1. Trigger was dropped or added

2. An index was dropped or added

3. An index went bad (too many inserts/deletes)

4. Pinned tables overran memory

5. A constraint was added to a large table

6. A stored procedure was changed

7. Someone started a monster killer job which is blocking

8. Failed RAID disk initiated a hot-standby kick-in and rebuild