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  3. November 2008

Re: Question about reducing program start overhead

On Wed, Nov 12, 2008 at 2:13 PM, McKown, John <John.Mckown@xxxxxxxxxxxxxxxxx
wrote:

Please pardon a very ignorant question. On our current system (looking
at an i to replace our z, maybe), we have a product called Strobe. It
can tell us where bottlenecks are in a program (without recompilation)
by doing "sampling" (i.e. a measurement is taken "n" times a second
while a program runs). This can show us CPU and I/O bottlenecks,
including bottleneck on database accesses. Does the "i" not have
anything similar?


Not an ignorant question. The answer is yes, the i has a number of programs
you can use to track down a performance problem.
http://publib.boulder.ibm.com/infocenter/iseries/v5r4/topic/rzahx/rzahxapsparent.htm

I'd have to say that many i developers are not that familiar with them
though. Heck, I know about them, but haven't ever really needed to use
them.

Charles

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