Friday, November 30, 2007

My Updated CMG 2007 Schedule

Here is an updated list of my sessions.

  1. Sunday Workshop

    "How to Move Beyond Monitoring, Pretty Damn Quick!"

    Session 191
    Sunday 1:00 PM - 4:30 PM
    Room: Elizabeth D/E

  2. CMG-T

    "Capacity Planning Boot Camp"

    Three Sessions 431
    Wednesday 1:15 PM - 2:15 PM
    Wednesday 2:45 PM - 3:45 PM
    Wednesday 4:00 PM - 5:00 PM
    Room: Elizabeth D/E

    Introductory CaP class for newbies.

  3. Apdex Alliance Meeting

    "Triangulating the Apdex Index with Barry-3"

    Sessions 45A
    Wednesday 4:00 PM - 5:00 PM

    This talk is part of the Apdex mini-conference at CMG and will be presented by Mario Jauvin, since it overlaps with my CMG-T classes.

  4. Hot Topics Paper 7050

    "Seeing It All at Once with Barry"

    Session 511 (Advanced)
    Hot Topics
    Monday 4 pm - 5 pm
    Room: Elizabeth D/E

    Dr. Neil J. Gunther, Performance Dynamics
    Mario Jauvin, MFJ Associates

Complete abstracts were blogged previously.

Wednesday, November 28, 2007

Apdex Meets Apex

The Apdex Alliance has defined a performance metric, called the Apdex index, which rates the measured response times of distributed applications from an Internet user perspective. The Apdex index is constructed from three categories which are defined by partitioning the total number of sample counts (C) according to an agreed upon threshold time (τ):
  1. Satisfied (0 < S < τ)
  2. Tolerating (τ < T < 4τ)
  3. Frustrated (F > 4τ)

Thursday, November 1, 2007

Perl::PDQ Corrigenda Updated

It's been a while, but reader Peter Altevogt (Germany) spotted some numerical inconsistencies in Table D.2 on p. 403 of my Perl:PDQ book. This turns out to be the result of an Excel gotcha when copying cells and pasting them to a different spreadsheet location; the cell reference gets silently incremented. Sigh! The correct values are now available on the corrigenda page. Thank you, Peter!