The Art of Network & Application Performance Analysis™
The Myth Series: “The Myth of Automated Metrics”
Picture a business user sitting at a PC workstation in a remote office of your company. Many times a day--a network transaction that should take 15 seconds--instead takes 90 seconds--maybe longer.
You have an automated tool that “simulates” that transaction every hour. In 24 polls we see the following:
4 Samples show 10 seconds (much faster than normal)
16 Samples show 15 seconds (expected)
4 Samples show 90 seconds (long enough to drive a user crazy.)
The average is 26.7 seconds.
66.7 % of all polls are exactly as expected.
16.7 % of all polls are better than expected!
Only 16.7 % of all polls are 90 seconds.
Would an alarm sound in your monitoring system?
With an expectation of 15 seconds--would you be concerned enough to escalate this issue?
Sure, it’s nearly double what is expected--but there are times that are quite excellent and anyway--it’s still not even 30 seconds! Maybe it's not so critical
It's Critical--to that user experiencing 90 second delays from time to time--or more frequently.
Network Application Performance Analysis:
This creates a clear picture of the factors that affect the application’s performance and shows the root causes of delays (like our hypothetical periodic 90 seconds).
These tests, once designed and baselined--can also be used to periodically monitor that application for early discovery of changes--that hurt its performance.
NOTE: Frequently such changes are a result of other applications in the environment. This process allows for discovery of such problems--without even directly testing those applications themselves.