What should a SysOps administrator do to resolve these errors?
Create a read replica of the database. Use Amazon Route 53 to create a weighted DNS record that contains both databases.
Use Amazon RDS Proxy to create a proxy. Update the connection string in the Lambda function.
Increase the value in the max_connect_errors parameter in the parameter group that the database uses.
Update the Lambda function’s reserved concurrency to a higher value.
Explanations:
Creating a read replica can help with read scalability but does not address the “too many connections” issue for write operations. It may also complicate the architecture without resolving the underlying connection limit problem.
Using Amazon RDS Proxy allows for connection pooling, which can significantly reduce the number of direct connections made to the RDS instance from Lambda functions. This helps mitigate the “too many connections” errors by managing database connections more efficiently.
Increasing the max_connect_errors parameter would not resolve the “too many connections” issue, as this parameter is related to failed connection attempts and not the limit on concurrent connections. It does not help if the connections exceed the max_connections limit.
Updating the Lambda function’s reserved concurrency might allow for more concurrent executions of the Lambda function but will not help if the underlying RDS database has reached its maximum connection limit. It does not address the fundamental issue of exceeding the allowed database connections.
I organize that the answer is:
Use Amazon RDS Proxy to create a proxy. Update the connection string in the Lambda function.