Two Questions Regarding AWS' RDS Multi AZ

Question

1. I understand that when upgrading to a Multi-AZ rds from a Single-AZ, there occurs a \"breef i/o freeze\". What exactly does that mean?

2. When an upgrade i

Answer 1

Answers to your questions are written down :

1. When you choose to move from Single AZ to Multi AZ, brief I/O freeze happens. It means that for some duration database won't be accessible. No read,write operations will be performed on the database. Mostly, the duration for this is around 3-4 minutes.

2. Yeah, production database will be affected when you resize the compute(from small to large). The best idea to perform resize operation is during scheduled maintenance window. If select Apply Immediately option, for sometime the database won't be accessible(time to switch control to backup server).

Regards, Sanket Dangi