246 HA Architectures & Capacity Planning with WebSphere Remote Server V6
or two representative cluster members is sufficient. However, it is essential to
check the CPU statistics for each node to make sure that all cluster member
processes are using similar amounts of CPU and there are no extra
processes consuming CPU on any nodes that can interfere with the
application server’s CPU efficiency.
Test on quiet systems
Avoid testing during database backups or maintenance cycles.
Use isolated networks
Whenever possible, load driving machines should share the same network
switch or router or both as your Web application servers, to rule out additional
network latency and network delays.
Performance tuning is an iterative process
Ten to fifteen ...