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Wireshark Revealed: Essential Skills for IT Professionals by Charit Mishra, Yoram Orzach, James H Baxter

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Performance analysis methodology

Analyzing an application's performance problem is basically a case of identifying where the majority of the time for a particular task to complete is being spent, and measuring/comparing that time to what is normal and/or acceptable for that type of task.

Top five reasons for poor application performance

Generally speaking, performance issues can be attributed to one of the following five areas, in order of decreasing likelihood:

  • Server processing time delay
  • Application turns delay
  • Network path latency
  • Bandwidth congestion
  • Data transport (TCP) issues

Client processing time is usually a relatively small component of overall response time—except perhaps for some compute-extensive desktop applications, which leaves the focus ...

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