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It seems like you've already done some troubleshooting and identified potential issues with the connection pooling and differences in SQL statements between the Aurora Serverless V1 and V2 instances. Here are some additional steps you can take to further investigate and improve the performance:
Database Configuration: Check if the configuration settings for your Aurora Serverless V2 instance are optimized for your workload. You may need to adjust parameters such as max_connections, max_parallel_workers, and other relevant settings based on your application's requirements.
Monitoring: Use Amazon CloudWatch metrics and Aurora Performance Insights to monitor the performance of your Aurora Serverless V2 instance. Look for any bottlenecks or resource constraints that could be impacting performance, such as CPU utilization, memory usage, or I/O activity.
Query Optimization: Analyze the SQL queries being executed on the Aurora Serverless V2 instance and identify any potential performance bottlenecks. Use tools like EXPLAIN and ANALYZE to analyze query execution plans and optimize your SQL queries for better performance.
Connection Pooling: Double-check your connection pooling configuration and ensure that it is correctly configured to manage database connections efficiently. Consider using connection pool management libraries like HikariCP or Tomcat JDBC Pool, which are optimized for high-performance and reliability.
Database Schema: Review your database schema and indexing strategy to ensure that it is optimized for your workload. Consider creating indexes on frequently queried columns and optimizing data retrieval queries to minimize overhead.
Testing and Benchmarking: Perform load testing and benchmarking on both Aurora Serverless V1 and V2 instances to compare performance under different scenarios. This will help identify any specific areas where performance is degraded on the V2 instance and guide optimization efforts.
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