Is this a good Benchmark?

Code:

Failed requests:        932
  (Connect: 0, Receive: 0, Length: 932, Exceptions: 0)

It means the length of the response was different. You must benchmark the page which does not change its length (bytes) if you don't want to see the failure.

If you use ab v2.4.7 or later, you can add -l option. It does not report errors if the length of the responses is not constant.
See https://httpd.apache.org/docs/2.4/programs/ab.html

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