Relationship Chain Locks: Don’t Block the Rock!

Neo4j has implemented new locking algorithms in version 4.3 that allow for more efficient concurrent updates on nodes with a high number of relationships, reducing lock contention and improving performance. This feature is enabled when nodes reach 50+ relationships, at which point they are considered super nodes, or when there are 10+ relationships of a given type and direction in any one group. The new algorithm reduces the impact of locking on performance, allowing for faster updates and improved scalability. By optimizing the locking mechanism, Neo4j 4.3 can handle dense node patterns more efficiently, resulting in significant performance improvements compared to previous versions.

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