Issue
Mendix Cloud Environments using an XS21, XS20, S (legacy), or Strato Cloud Resource Pack might regularly receive Alerts regarding "Database Freeable Memory".
The lack of freeable memory can also be seen in the metrics, as shown in the example below.
Environment
Applications hosted in Mendix Cloud
Cause
The memory usage of a database instance in the Mendix Cloud includes more than just the database itself. It also encompasses the Operating System (OS) memory required to run the database instance and the memory needed to operate the database server. When an RDS instance, the database instance Amazon Relational Database Service (RDS), is spun up, the OS and RDS automatically consume about 500 MB of memory, which cannot be controlled. Even with minimal activity in the environment, memory issues may still arise when using an XS21, XS20, S (legacy), or Strato container, as it has only 1GB of database node memory.
Solution/Workaround
The critical threshold for XS21, XS20, S (legacy), or Strato has been raised to 5% to reduce the number of alerts.
If alerts continue to occur, it is recommended to monitor the environment’s performance. As long as the environment operates smoothly, no immediate action is required other than ongoing observation. If performance concerns arise, upgrading to a larger container may be considered.
Internal information related
- 199131
Additional information
- Mendix documentation:
- Related KBA: Database freeable memory alert
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