Aurora Serverless v2 doesn't go back to 0.5 ACUs even when there is no activity on the database

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We are observing consistently that the v2 serverless doesn't fall back to 0.5 ACUs when there is no activity on the database. It stays at 1.5-2 leading to 3 times the cost. I have attached two charts from Monitoring tab

  1. ACUS
  2. Database connections

As we can observe even when there are 0 connections, the ACUs stay high ARN of RDS instance: db-cluster-4.cluster-cjpydjcv1v6a.us-east-1.rds.amazonaws.com Database Endpoint: db-cluster-4.cluster-cjpydjcv1v6a.us-east-1.rds.amazonaws.com

ACU-configuration
ACU-configuration

ACUs-last-12-hours
ACUs-last-12-hours

db-connections-last-12-hours
db-connections-last-12-hours

2 réponses
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We have already read this and performance monitoring / performance insight is already disabled from our end.

ruchit
répondu il y a 5 mois
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There could be other features that consume memory. They might not set a lower bound on the ACUs when used individually, but in combination might take up enough memory to cause scaling. Are there any options you turned on when creating this cluster (e.g. IAM) or in PostgreSQL after setting up the cluster (e.g. logical replication)? Global database (the "Add Region" action in the console) is another one that's documented as requiring a minimum number of ACUs (8).

johrss
répondu il y a 3 mois

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