HeatWave improves the performance of analytical queries by parallelizing query execution across multiple HeatWave nodes. This allows complex queries to be processed faster by dividing the workload across several in-memory nodes.

The binary log records all changes made on the primary server, while the relay log on the replica stores the changes that need to be applied to the replica server. Both logs are essential for replication to function properly.

The innodb_log_file_size parameter controls the size of the InnoDB redo log files. These logs help in transaction management and recovery. Increasing the size can reduce the frequency of log flushes, improving performance during write-heavy operations.

The innodb_file_per_table option determines whether each InnoDB table is stored in a separate .ibd file instead of the shared tablespace.

MySQL InnoDB Cluster uses Group Replication with automatic failover to promote a new primary server automatically in the event of primary server failure, ensuring continued availability.