I am dumping data from a production account into a QA account. I made a manual snapshot of an encrypted database, made a new encrypted snapshot that is shared between accounts (gave privileges to the KMS key to the QA account, a symmetric key). I made the corresponding snapshot of the shared one in the QA account and restored it to a new DB instance.

The problem I am having is that the data from the production environment is slowing down the QA environment by an unreasonable amount. The QA API gets pinned at 99% CPU usage and the number of connections on the QA database only keeps growing. What might be the root cause of the issue?

There is a size instance difference between the accounts (i.e small vs micro instances) but nothing to warrant such a spike. Using an older snapshot does not produce the same issue.

Other info. Database: MariaDb 10.2 API : .Net 4.6 EntityFramework.

CodePudding user response：

The issue was caused by a loose AWS lambda hitting the QA API, trying to process an unreasonable amount of data at the same time leading to a CPU bottleneck.