Reviewing performance during external design

You should review performance during the external design phase for your system.

Procedure

During the external design phase, you must:

  1. Estimate the network, web server, application server, processor, and disk subsystem workload.
  2. Refine your estimates of logical disk accesses. Ignore physical accesses at this stage.
    One of the major difficulties is determining the number of I/Os per statement.