18 DB2 UDB V8 and WebSphere V5 Performance Tuning and Operations Guide
1.5.2 Performance-tuning limits
Every system has its own limitations and boundaries. Beyond certain limits you
start releasing that even after putting a lot of efforts in tuning process only a small
amount of efficiency benefits reaped from the system.
Try to consider how much time and money your management is ready to spend
on improving system performance, and how much the end user will benefit from
this process. Take care of budgets because sometimes significant performance
improvement requires additional infrastructure, that is, you might need to add
more disk storage, faster CPU, additional CPUs, more main memory, faster
communication links, or a combination of thes ...