Performance Tuning Guide - EMC Community Network

Planning Capacity and Sizing
Figure 3. Peak versus average loads
Lack of capacity to handle peak loads does not matter if you can defer the processing of peak periods
over a longer period when volumes are less than available capacity. However, process deferral
can increase cycle time and violate your SLA.
Size your capacity (maximum available throughput) to handle peak loads within specified SLA. If
your SLAs are relaxed enough to be able to defer processing of peak loads, you can size capacity to a
demand curve that fits or exceeds the average load (Figure 4, page 16).
Figure 4. Average must be within capacity
If your average demand exceeds your available capacity, you cannot defer processing to another
time period. Capacity that is less than average demand leads to a system that can never catch up
with the backlog.
16 EMC Documentum xCP 1.0 Performance Tuning Guide