How to solve the synchronization delay issue with Oracl…

To address the synchronization delay issue in Oracle ADG (Active Data Guard), the following measures can be taken:

1. Optimize the network: ensure that the bandwidth and latency meet the requirements of ADG. Network performance can be improved by increasing bandwidth, optimizing network topology, and using high-speed network devices.
2. Adjust synchronization mode: ADG offers various synchronization modes such as sync, maximum availability, and maximum performance. Choose the appropriate synchronization mode based on business needs and system performance. The higher the synchronization mode, the lower the latency, but it may affect the performance of the source database.
3. Optimizing database performance: By optimizing SQL queries, index design, table partitioning, etc., database performance can be improved and data synchronization delays reduced.
4. Increase the resources of the ADG server: Upgrade the CPU, memory, and storage of the ADG server to improve the speed of data synchronization and reduce latency.
5. Utilizing Flashback technology: Oracle’s Flashback technology can reduce data synchronization delays by recording database change logs. Flashback Data Archive and other features can expedite data synchronization.
6. Monitor and adjust ADG configuration: Regularly monitor the synchronization delay of ADG, adjust database parameters and configuration based on monitoring results to achieve better performance and synchronization delay.
7. Upgrade the database version: If you are using an older Oracle version, it may be beneficial to upgrade to a newer version to improve ADG performance and synchronous delay.

In conclusion, resolving the synchronization delay issue in Oracle ADG requires a comprehensive consideration of factors such as network, database performance, synchronization mode, and configuration, and implementing corresponding optimization measures.