Demystifying Performance

I've always felt attracted to computer performance subjects: throughput, response time, sizing, bottlenecks, usage, capacity. I've not always seen clear, understandable and knowledgeable explanations on these subjects. With the arrival of the virtualization even more complexity is introduced: terms that represented constant values, like the machine capacity, gets blurred. What can be said about a virtual machine capacity if it is no longer a fixed value and may change from this hour to the next?

dimecres, 11 de desembre del 2013

The 65% Rule Revisited

Another document I authored: http://ibm.biz/65-rule.

Abstract: This article deals with the 65% load limit warning that everyone in the sizing business is (or should be) aware with: don't go beyond 65% of the service center capacity! But in the virtual world a service center capacity is no longer a fixed value, so what happens then? How should this 65% rule be reinterpreted?

Demystifying Performance

dimecres, 11 de desembre del 2013

The 65% Rule Revisited

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