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GlossaryΒΆ

CUs
Concurrent users or number of concurrent threads executing tests.
Request
A single GET/POST/redirect/xmlrpc request.
Page
A request with redirects and resource links (image, css, js) for an html page.
STPS
Successful tests per second.
SPPS
Successful pages per second.
RPS
Requests per second, successful or not.
maxSPPS
Maximum SPPS during the cycle.
maxRPS
Maximum RPS during the cycle.
MIN
Minimum response time for a page or request.
AVG
Average response time for a page or request.
MAX
Maximmum response time for a page or request.
P10
10th percentile, response time where 10 percent of pages or requests are delivered.
MED
Median or 50th percentile, response time where half of pages or requests are delivered.
P90
90th percentile, response time where 90 percent of pages or requests are delivered.
P95
95th percentile, response time where 95 percent of pages or requests are delivered.
Apdex

Application Performance Index, this is a numerical measure of user satisfaction, it is based on three zones of application responsiveness:

  • Satisfied: The user is fully productive. This represents the time value (T seconds) below which users are not impeded by application response time.
  • Tolerating: The user notices performance lagging within responses greater than T, but continues the process.
  • Frustrated: Performance with a response time greater than 4*T seconds is unacceptable, and users may abandon the process.

By default T is set to 1.5s this means that response time between 0 and 1.5s the user is fully productive, between 1.5 and 6s the responsivness is tolerating and above 6s the user is frustrated.

The Apdex score converts many measurements into one number on a uniform scale of 0-to-1 (0 = no users satisfied, 1 = all users satisfied).

To ease interpretation the Apdex score is also represented as a rating:

  • U for UNACCEPTABLE represented in gray for a score between 0 and 0.5
  • P for POOR represented in red for a score between 0.5 and 0.7
  • F for FAIR represented in yellow for a score between 0.7 and 0.85
  • G for Good represented in green for a score between 0.85 and 0.94
  • E for Excellent represented in blue for a score between 0.94 and 1

Visit http://www.apdex.org/ for more information.