A. Modify the MaxConnectionsPercent parameter through the RDS Proxy console.
B. Use CALL mysql.rds_kill(thread-id) for the IDLE threads that are returned from the SHOW FULL PROCESSLIST command.
C. Modify the MaxIdleConnectionsPercent parameter for the RDS proxy.
D. Modify the max_connections configuration setting for the DB instance. Modify the ConnectionBorrowTimeout parameter for the RDS proxy.

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