Definition of Connect, Processing, Waiting in apache bench.

Question

When I run apache bench I get results like:

Command: abs.exe -v 3 -n 10 -c 1 https://mysite
Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:      203  213   8.1    219     219
Processing:    78  177  88.1    172     359
Waiting:       78  169  84.6    156     344
Total:        281  389  86.7    391     563

I can't seem to find the definition of Connect, Processing and Waiting. What do those numbers mean?

Answer 1

From http://chestofbooks.com/computers/webservers/apache/Stas-Bekman/Practical-mod_perl/9-1-1-ApacheBench.html:

Connect and Waiting times

The amount of time it took to establish the connection and get the first bits of a response

Processing time

The server response time—i.e., the time it took for the server to process the request and send a reply

Total time

The sum of the Connect and Processing times

I equate this to:

• Connect time: the amount of time it took for the socket to open
• Processing time: first byte + transfer
• Waiting: time till first byte
• Total: Sum of Connect + Processing