CLUSTER_CREDITS is a system parameter that specifies the number of per-connection buffers a node allocates to receiving VMS$VAXcluster communications.
If the SHOW CLUSTER command displays a high number of credit waits for the VMS$VAXcluster connection, you might consider increasing the value of CLUSTER_CREDITS on the other node. However, in large cluster configurations, setting this value unnecessarily high consumes a large quantity of nonpaged pool. Each receive buffer is at least SCSMAXMSG bytes in size but might be substantially larger depending on the underlying transport.
It is not required for all nodes in the cluster to have the same value for CLUSTER_CREDITS.