Weekly Report - January 27, 2025

1. Fixing the Exception Issue in the Database Nested Transaction Mechanism During Concurrent Transactions

We redesigned the management logic of nested transactions to ensure that transactions can be correctly initiated, committed, and rolled back in a concurrent environment. Additionally, we optimized the locking mechanism to reduce the occurrence of deadlocks. The fix was implemented in the development environment, followed by multiple rounds of stress testing. The test results indicated that the repaired system can operate stably under high concurrency, with a significant reduction in the exception rate of nested transactions.

2. Fixing the Concurrency Issue with Certain Instructions in the Virtual Machine

We optimized the execution logic of the relevant instructions, adopted a more efficient scheduling algorithm, and introduced thread safety mechanisms to ensure correctness and efficiency in a concurrent environment. After the fix, comprehensive unit tests and integration tests were conducted to ensure that the new logic can operate stably in a concurrent environment without introducing new issues.