ApacheBench ab压测工具

ab简介

ApacheBench 是 Apache服务器自带的一个web压力测试工具,简称ab。ab又是一个命令行工具,根据ab命令可以创建很多的并发访问线程,模拟多个访问者同时对某一URL地址进行访问,因此可以用来测试目标服务器的负载压力。

安装ab

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sudo apt-get install apache2-utils

参数列表

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Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:
-n requests Number of requests to perform //请求链接数
-c concurrency Number of multiple requests to make at a time //表示并发数
-t timelimit Seconds to max. to spend on benchmarking
This implies -n 50000
-s timeout Seconds to max. wait for each response
Default is 30 seconds
-b windowsize Size of TCP send/receive buffer, in bytes
-B address Address to bind to when making outgoing connections
-p postfile File containing data to POST. Remember also to set -T
-u putfile File containing data to PUT. Remember also to set -T
-T content-type Content-type header to use for POST/PUT data, eg.
'application/x-www-form-urlencoded'
Default is 'text/plain'
-v verbosity How much troubleshooting info to print
-w Print out results in HTML tables
-i Use HEAD instead of GET
-x attributes String to insert as table attributes
-y attributes String to insert as tr attributes
-z attributes String to insert as td or th attributes
-C attribute Add cookie, eg. 'Apache=1234'. (repeatable)
-H attribute Add Arbitrary header line, eg. 'Accept-Encoding: gzip'
Inserted after all normal header lines. (repeatable)
-A attribute Add Basic WWW Authentication, the attributes
are a colon separated username and password.
-P attribute Add Basic Proxy Authentication, the attributes
are a colon separated username and password.
-X proxy:port Proxyserver and port number to use
-V Print version number and exit
-k Use HTTP KeepAlive feature
-d Do not show percentiles served table.
-S Do not show confidence estimators and warnings.
-q Do not show progress when doing more than 150 requests
-l Accept variable document length (use this for dynamic pages)
-g filename Output collected data to gnuplot format file.
-e filename Output CSV file with percentages served
-r Don't exit on socket receive errors.
-h Display usage information (this message)
-Z ciphersuite Specify SSL/TLS cipher suite (See openssl ciphers)
-f protocol Specify SSL/TLS protocol
(SSL3, TLS1, TLS1.1, TLS1.2 or ALL)

基本使用

GET 压测

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ab -n 100 -c 10 http://www.baidu.com/
  • -n表示请求数
  • -c表示并发数

样例输出为:

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This is ApacheBench, Version 2.3 <$Revision: 1430300 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking www.baidu.com (be patient).....done


Server Software: BWS/1.1
Server Hostname: www.baidu.com
Server Port: 80


Document Path: / #测试页面
Document Length: 112439 bytes #测试页面大小

Concurrency Level: 10 #并发数
Time taken for tests: 1.256 seconds #整个测试话费的时间
Complete requests: 100 #完成请求的总量
Failed requests: 96 #失败的请求次数
(Connect: 0, Receive: 0, Length: 96, Exceptions: 0)
Write errors: 0
Total transferred: 11348660 bytes #传输数据总大小
HTML transferred: 11253726 bytes #传输页面总大小
Requests per second: 79.62 [#/sec] (mean) #平均每秒请求数
Time per request: 125.593 [ms] (mean) #平均每次并发10个请求的处理时间
Time per request: 12.559 [ms] (mean, across all concurrent requests) #平均每个请求处理时间,所有并发的请求加一起
Transfer rate: 8824.29 [Kbytes/sec] received #平均每秒网络流量

Connection Times (ms)
min mean[+/-sd] median max
Connect: 4 20 7.7 18 38
Processing: 18 90 50.5 82 356
Waiting: 4 22 7.9 22 41
Total: 22 111 50.7 101 384
#花费在连接Connect,处理Processing,等待Waiting的时间的最小min,平均值mean,标准差[+/-sd],中值median,最大表max的一个表。

Percentage of the requests served within a certain time (ms)
50% 101 #50%请求的响应时间在101ms内
66% 103 #66%请求的响应时间在103ms内
75% 104 #...以此类推
80% 105
90% 111
95% 267
98% 311
99% 384
100% 384 (longest request)

带自定义header请求:

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ab -n 100 -H “Cookie: Key1=Value1; Key2=Value2” http://test.com/

POST请求

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ab -n 1 -c 1 -p 'post.txt' -T 'application/x-www-form-urlencoded'   http://192.168.188.6:8080/distributeLock2
  • -p 用来做post数据的文件,这里此文件保存在ab同级目录下
  • -T 设置content-type值
# linux

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