This AppNote will provide you with a better understanding of several of NetWare 4.0's setable parameters. In every case, auto-tuning increases the number of resources available to the operating system. These increases occur when there is an imbalance between service requests and available resources. When the server detects a need for additional bandwidth in any of the auto-tuning parameters, the parameter is increased. However, because resources are limited, and because these parameters are never decreased, these automatic increases must be constrained.
Constraints are also necessary to soften the allocation impact of brief utilization peaks.
For instance, a large NDIR search could easily cause NetWare to permanently allocate most of the available cache memory for directory cache buffers if there were no limits placed on the allocation. Auto-tuning constraints are imposed by using the SET console command at the server. Most of NetWare's setable parameters specify wait times, maximums, and minimums for allocating a particular resource. Wait time is the length of time the operating system must wait, since the last allocation of new resource, before allocating a new resource unit. Minimum is thenumber of resources before which the operating system may freely allocate new resources without any wait time .