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IBM Power Systems Performance Guide: Implementing and Optimizing by Zhi Zhang, William Zanatta, Richard Wale, Niranjan Srinivasan, Bjorn Roden, Ronan Resende, Bharath Raj, Sijo Kurian, Sae Kee Kim, Chandrakant Jadhav, Talor Holloway, Murali Dhandapani, Chi Hui Chen, Sebastien Chabrolles, Dino Quintero

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Performance monitoring tools and what they are telling us
This appendix discusses performance monitoring tools and explains what the tools are telling us while trying to tune your IBM POWER Systems environment.
The following topics are discussed:
NMON
NMON
Any AIX administrator who has worked on any performance issue should already be very familiar with and fond of the nmon tool. For those who have not, here is a short history lesson:
nmon (Nigel’s performance MONitor) was created in 1997 by Nigel Griffiths, ...

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