Replication Server – Advanced Services Option

Replication Server – Advanced Services Option is a separately licensed product option for Replication Server that contains Replication Server performance enhancements.

• High Volume Adaptive Replication
  High-Volume Adaptive Replication (HVAR) uses compilation and bulk-apply processes that result in data reduction and achieve better performance compared to continuous replication mode, which sends each replication operation to the replicate database directly, row-by-row and in log order.
• Enhanced DSI Efficiency
  Enhanced Data Server Interface (DSI) efficiency improves performance by reducing data replication latency, which decreases the length of time that Replication Server waits for results from the replicate data server through the ct_results routine, and subsequently reduces the length of time the data server waits for Replication Server.
• Enhanced RepAgent Executor Thread Efficiency
  Enhanced RepAgent executor thread efficiency improves performance by using the NRM thread to normalize and pack Log Transfer Language (LTL) commands in parallel with parsing by the RepAgent Executor thread.
• Enhanced Distributor Thread Read Efficiency
  With Replication Server 15.5, the distributor (DIST) thread reads SQL statements directly from the Stable Queue Transaction (SQT) thread cache. This reduces the workload from SQT and the dependency between the two, and improves the efficiency of both SQT and DIST.
• Enhanced Memory Allocation
  Enhanced memory allocation improves performance by allocating memory in larger chunks and therefore reducing the number of memory allocations.
• Increased Queue Block Size
  The queue block size has been increased allowing you to process more transactions in a single block.