OK, this clearly looks CPU-bound:

First, have a look at the "us", "sy", "id" and "wa" columns of the "cpu" part: these are percentages, denoting the time the processors spent (on average) in the "users", "system", "idle" and "wait" parts of processing: "user" is roughly your programs, "system" is kernel activity and other system services, "idle" is when no process is running and "wait" is like idle, but with I/O operations outstanding. If you would have high "wait" percentages it would hint to a I/O-bound system, but this isn't the case here. In fact your system is busy to saturation running your application, which is as it should be. If it is too slow the only thing that helps is more processing power.

Alas the system cannot get more processors right now. The last column, "ec" is the "entitled capacity" and it is at near 100(%) too. LPARs get some share of the systems processors per default, but can be entitled to some bigger amount should the necessity arise. These additional resources are dynamically added should the system get near saturation and are dynamically relinquished once the situation gets less demanding. This system already has already allocated as much as it will ever get and this still isn't enough.

Now, lets look at the top line of the output: you have 10 logical CPUs. What a "logical CPU" comprises (some fraction of a physical CPU) depends on the physical CPU backing it and ultimately on the hard you run: POWER5? POWER6? POWER7? It might be that 10 lCPUs are a poor layout for your underlying hardware and overtax the physical CPUs with too many context switches.

Anyway, you definitely have to add CPUs to this LPAR: at the HMC modify the LPAR profile to add more (physical) CPUs as "desired" and also increase the "maximum" processors to a new sensible value. To know what a "sensible value" for "maximum" is you probably will have to monitor the system for a while, so go with a good estimation and change that after a few days. After you changed the profile you will have to reboot (cold reboot/power cycle - simple "shutdown -r" won't help) to have the new profile used.

I hope this helps.

bakunin