MySQL MySQL 8.0 MongoDB prometheus mysqld_exporter mysql monitoring MySQL 8.0 New Feature MongoDB Execution Plan MySQL JSON grafana rds_enhanced_exporter rds_exporter MySQL Table Drop Issue MySQL 5.7 Table Drop MySQL 8.0 Table Drop MySQL Table Drop MySQL 5.7 upgrade MySQL 5.7 MySQL Partition MySQL Partition Key Length MongoDB PV Replica set Protocol Version MongoDB Protocol Version MongoDB Replicaset MySQL binlog_row_value_options binlog_row_value_options SCRAM-SHA-256 SCRAM-SHA-1 MONGODB-CR Mongo Authentication Mechanism MongoDB Authentication Mechanism MySQL Atomic data definition statement MySQL Atomic DDL MongoDB Plan Cache MongoDB Explain binlog_row_metadata MySQL 8.0 JSON MySQL Optimizer Trace MySQL 8.0 Optimizer MySQL Optimizer MySQL Xcode Debug MySQL 8.0 Debug MySQL Debug cloudwatch binary log rds percona Monitoring