For cluster stability: the cluster turned from green to yellow due to 4 nodes OOM (Out of Memory) when using 112 clients sending requests against old hash algorithm. For new hash algorithm, no OOM ...

Abstract: Hash join is one of important operations in database system, and its performance may slow down because of disk I/O in hash table overflow phenomenon. In that phenomenon, the more overflow of ...

Multi-table joins are the most time-consuming operations in database systems. From an execution perspective, the less data there is, the smaller the overhead caused by the Join operation. If two ...

Abstract: Hash join is one of the most important and widely used query processing operations. In many real-world applications, such as graph data analysis, join keys can be highly skewed. However, ...