我正在使用 ApacheBench 来获取一些基本的时间信息。很好地满足了我的需求。我注意到“-g 文件”创建了一个制表符分隔文件，每个调用都作为一行。但是，我无法确定列的定义。这是我最好的猜测：
starttime：不言自明，此调用开始的时间
秒：根据数据，我认为这可能是不同格式的“开始时间”
ctime : ?，对我来说每一行都有一个 0 值，所以不知道
dtime，ttime，wait： dtime 或 ttime 或 wait 似乎是“此调用以毫秒为单位的时间”
AB 文档似乎没有涵盖输出格式。任何人都知道这些列的含义，或者我在哪里可以找到一些文档？
以下是我的推断：
我是如何推断的：
$ 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
相比于：
$ cat output.txt
starttime seconds ctime dtime ttime wait
Thu May 26 12:24:02 2011 1306437842 79 251 330 91
这里有一个很好的解释（包括wait接受的答案中缺少的解释）：
我得出了与 saltycrane 相同的结果，但想补充一些（并想总结一下）：
date -d @1306437842返回开始时间输出）