After the reboot starts, interrupt the boot process and go into single-user mode to make sure the device files still match the hardware addresses. Note that existing LVM disks must keep the same device file names. These names are hardcoded into several config files and cannot be changed easily. I have a 735 running HP-UX 10.01. I've noticed lately that my application transactions have been taking longer.
Performance analysis is a very complex process.
It is a service that HP offers on a consulting basis. The important thing to remember is that performance is very relative. There are very seldom definite thresholds to go by. Also, what one user finds acceptable performance another may not. Since the performance statistics are relative, the best thing for you to do is gather data when the system is performing well.