![]() When upgrading from an earlier TiDB version to v5.3.0, if you want to know the compatibility change notes of all intermediate versions, you can check the Release Notes of the corresponding version. ![]() Reduce the write latency of TiKV by separating I/O operations from Raftstore thread pool (disabled by default).Continue optimizing the storage and computing engines to improve the system performance and stability.Support the continuous profiling experimental feature to improve the observability of database performance.Support saving and restoring the on-site information of a cluster with a single SQL statement, which helps improve the efficiency of troubleshooting issues relating to execution plans.Support parallel import using multiple TiDB Lightning instances to improve the efficiency of full data migration.Enhance the performance of TiDB Data Migration (DM) so that data is migrated from MySQL to TiDB with lower latency.Optimize the timestamp processing flow in TiDB to improve the overall performance.Support creating users with the least privileges on TiDB Dashboard to enhance system security.Support setting attributes for tables and partitions.Introduce temporary tables to simplify your application logic and improve performance.In v5.3, the key new features or improvements are as follows:
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