ab压力测试
概述
ab命令全称为 Apache bench 是Apache自带的压力测试工具。ab命令非常实用,它不仅可以对Apache服务器进行网站访问压力测试,也可以对或其它类型的服务器进行压力测试,ab命令会创建多个并发线程,模拟多个访问者同时对某一个url地址进行访问,实现压力测试
ab命令对发出负载的计算机要求很低,它既不会占用很高CPU,也不会占用很多内存。但却会给目标服务器造成巨大的负载,其原理类似CC攻击,可能会造成目标服务器资源耗尽,严重时可能会导致死机,而且它没有图形化结果不能监控,所以只能用作临时紧急任务和简单的测试
官方文档:ab - Apache HTTP server benchmarking tool
我的mac不记得啥时候装了。
命令选项:
qicycledeMacBook-Pro-3:~ qicycle$ ab -h
Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:
-n requests Number of requests to perform
-c concurrency Number of multiple requests to make at a time
-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.
-m method Method name
-h Display usage information (this message)
-I Disable TLS Server Name Indication (SNI) extension
-Z ciphersuite Specify SSL/TLS cipher suite (See openssl ciphers)
-f protocol Specify SSL/TLS protocol
(TLS1, TLS1.1, TLS1.2 or ALL)
-E certfile Specify optional client certificate chain and private key
qicycledeMacBook-Pro-3:~ qicycle$ ab -V
This is ApacheBench, Version 2.3 <$Revision: 1879490 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
实例
模拟10个客户端,在10秒内测试10000次压力测试,目的url是http://10.0.22.121:1180/break
qicycledeMacBook-Pro-3:~ qicycle$ ab -c 10 -t 10 -n 10000 -k 'http://10.0.22.121:1180/break'
This is ApacheBench, Version 2.3 <$Revision: 1879490 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 10.0.22.121 (be patient)
Completed 1000 requests
Completed 2000 requests
Finished 2528 requests
Server Software: openresty/1.15.8.2
Server Hostname: 10.0.22.121
Server Port: 1180
Document Path: /break
Document Length: 20 bytes
Concurrency Level: 10
Time taken for tests: 10.092 seconds
Complete requests: 2528
Failed requests: 2356
(Connect: 0, Receive: 0, Length: 2356, Exceptions: 0)
Non-2xx responses: 2356
Keep-Alive requests: 2507
Total transferred: 786151 bytes
HTML transferred: 378044 bytes
Requests per second: 250.49 [#/sec] (mean)
Time per request: 39.922 [ms] (mean)
Time per request: 3.992 [ms] (mean, across all concurrent requests)
Transfer rate: 76.07 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.3 0 4
Processing: 1 35 142.0 3 1001
Waiting: 1 35 142.0 3 1001
Total: 1 35 142.0 3 1001
Percentage of the requests served within a certain time (ms)
50% 3
66% 3
75% 4
80% 4
90% 5
95% 212
98% 681
99% 816
100% 1001 (longest request)