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That was my first thought, but no, maintenance is scheduled for saturdays. Its not Multi-az. The only other thing i can think of was that maybe backups are happening but that is scheduled for 5 UTC. I havent worked much with DB's, could it be that there is more data on thursdays to query?
답변함 3년 전

Hi Jennifer,
Any chance you may have your RDS maintenance window setup during that time? Any indication in logging or the RDS console that a failover might be happening during that (if multi-AZ)?