additional cpu

[Rogelio Ordinario]

I have 2 node cluster N class that needs 4th CPU. Is there an additional test to perform to check efficiency of the 4th CPU? Any tuning on parameter reconfiguring?

[Varghese Mathew]

Hi,

Need more details so as to have more ideas..
Ok simply speaking check the system resouces using top, sar, gpm (glanceplus manager)

Depends on your database, obviously that has to be tuned, in order to have better performance. Suppose DB is Informix then you need to specify change certain parameters in onconfig file etc. like "vp"

Hope this helps..
Cheers !!!
Mathew

[Michael Tully]

Hi,

If you wanted to split the workload, you
could purchase PRM and Workload Manager,
but before doing so I would make sure that
your system is tuned correctly without
spending any money as with the ones Mathew
has suggested. (Glance is not free). The ideal
tools to do so would to use the measureware
agent part of glance. Collect the information
export it and analyse it, e.g. through Excel.
There is a 60 day trial version of this software on your application CD set.

The system 'generally' speaking will try to
allocate resources of the CPU's automatically.

HTH
-Michael

[Bill McNAMARA_1]

As micheal suggests, you could use measureware/ perfview to monitor the platform cpu_idle time of cpu_util over time and hopefully visually notice a perf gain as soon as you add the additional cpu.

sar and vmstat may also help analyse perf increases, but measureware is certainly the most graphical.. it is available for 60 day trial download, and covers a lot more that cpu stats, network, disk and memory stats are also collected, so you'll probably see the bottleneck moving elsewhere after adding the cpu.

Later,
Bill