I am using ApacheBench to get some basic timing information. Meeting my needs very well. I noticed that "-g file" creates a tab delim'ed file with each call as a row. I am unable to determine the definition of the columns however. Here is my best guess:
starttime: self-explanatory, the time that this call started
seconds: based on data, I think this may be "starttime" in a different format
ctime: ?, has a 0 value for each row for me, so no idea
dtime, ttime, wait: either dtime or ttime or wait appear to be the "time that this call took in ms"
The AB documentation doesn't seem to cover the output format. Anyone know what these columns mean, or where I can find some documentation?
Here is what I have deduced:
How I deduced this:
$ ab -v 2 -n 1 -c 1 -g output.txt http://stackoverflow.com/questions/5929104/apache-bench-gnuplot-output-wha
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking stackoverflow.com (be patient)...INFO: POST header ==
---
GET /questions/5929104/apache-bench-gnuplot-output-what-are-the-column-definitions HTTP/1.0
Host: stackoverflow.com
User-Agent: ApacheBench/2.3
Accept: */*
---
LOG: header received:
HTTP/1.1 200 OK
Cache-Control: public, max-age=60
Content-Type: text/html; charset=utf-8
Expires: Thu, 26 May 2011 19:24:52 GMT
Last-Modified: Thu, 26 May 2011 19:23:52 GMT
Vary: *
Date: Thu, 26 May 2011 19:23:51 GMT
Connection: close
Content-Length: 29118
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>performance testing - apache bench gnuplot output - what are the column definitions? - Stack Overflow
<link rel="shortcut icon" href="http://cdn.sstatic.net/stackoverflow/img/favicon.ico">
<link rel="apple-touch-icon" href="http://cdn.sstatic.net/stackoverflow/img/apple-touch-icon.png">
<link rel="search" type="application/opensearchdescription+xml" title="Stack Overflow" href="/opensearch.xml
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></scrip
<script type="text/javascript" src="http://cdn.sstatic.net/js/stub.js?v=005820c36f6e"></script>
<link rel="stylesheet" type="text/css" href="http://cdn.sstatic.net/stackoverflow/all.css?v=d75e6659067e">
<link rel="canonical" href="http://stackoverflow.com/questions/5929104/apache-bench-gnuplot-output-what-
<link rel="alternate" type="application/atom+xml" title="Feed for question 'apache bench gnuplot output
..done
Server Software:
Server Hostname: stackoverflow.com
Server Port: 80
Document Path: /questions/5929104/apache-bench-gnuplot-output-what-are-the-column-definitions
Document Length: 29118 bytes
Concurrency Level: 1
Time taken for tests: 0.330 seconds
Complete requests: 1
Failed requests: 0
Write errors: 0
Total transferred: 29386 bytes
HTML transferred: 29118 bytes
Requests per second: 3.03 [#/sec] (mean)
Time per request: 329.777 [ms] (mean)
Time per request: 329.777 [ms] (mean, across all concurrent requests)
Transfer rate: 87.02 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 79 79 0.0 79 79
Processing: 251 251 0.0 251 251
Waiting: 91 91 0.0 91 91
Total: 330 330 0.0 330 330
Compare to:
$ cat output.txt
starttime seconds ctime dtime ttime wait
Thu May 26 12:24:02 2011 1306437842 79 251 330 91