Default: 0
Range: 0, 2 – 64
Related parameters: n_update_threads

Use this parameter to configure the number of RPC buffers to be used when the parameter n_update_threads is set to a value greater than 1. If you let this parameter default or set it to 0, the client uses 4 times n_update_threads RPC buffers. Raising this value might improve performance by ensuring that there are enough buffers queued to keep the update workers busy at all times.