v2.10.1

v2.10.1 - Aug 22, 2023

Improvements and bug fixes

• Improved performance on batch update of properties, e.g., MATCH (n) SET n += {prop1:1, prop2:2, ...}; #1115
• Added a delta cache to improve query performance. This helps in situations of repeated reads of vertices which have many delta changes caused by another transaction while the current transaction is operating with snapshot isolation level and so needs to process those deltas. This can be tuned using --delta-chain-cache-threshold. #1124
• Concurrent access to the same query module had a race-condition on the pointer that was used to handle the custom memory management. A mapping has been added that keeps the information about what thread used what pointer to handle the memory resources, which should be fine since the respected query executions are running on a dedicated thread. Access to the mapping itself is thread-safe. A simple RWLock has been implemented here, as we shouldn't include memgraph::utils from this header and a traditional mutex might be overkill. A simple RAII wrapper for the mapping container has been also added for simpler client-side use #1158