1.安裝ab命令
sudo apt-get install apache2-utils
2.ab命令参数说明
Usage: ab [options] [http[s]://]hostname[:port]/path Options are: //总的请求数 -n requests Number of requests to perform宅 //一次同时并发的请求数 总的请求数(n)=次数*一次并发数(c) -c concurrency Number of multiple requests to make -t timelimit Seconds to max. wait for responses -b windowsize Size of TCP send/receive buffer, in bytes -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 for POSTing, 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. -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 (SSL2, SSL3, TLS1, or ALL)
3.运行 ab -n 100 -c 10 http://www.meetu.hk/ 对 http://www.meetu.hk/ 进行100次请求，10个并发请求压力测试结果。
Server Software: lighttpd/1.4.20 Server Hostname: www.meetu.hk Server Port: 80 Document Path: / Document Length: 2095 bytes Concurrency Level: 10 //整个测试持续的时间 Time taken for tests: 3.303 seconds //完成的请求数量 Complete requests: 100 Failed requests: 0 Write errors: 0 Total transferred: 235200 bytes HTML transferred: 209500 bytes //平均每秒处理30个请求 Requests per second: 30.27 [#/sec] (mean) //平均每个请求处理时间为330毫秒 注:这里将一次10个并发请求看成一个整体 Time per request: 330.335 [ms] (mean) //平均每个并发请求处理 时间 为33毫秒 Time per request: 33.034 [ms] (mean, across all concurrent requests) Transfer rate: 69.53 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 51 170 35.9 178 230 Processing: 60 153 64.5 121 263 Waiting: 55 148 64.4 115 258 Total: 235 322 59.9 299 437 Percentage of the requests served within a certain time (ms) //在这100个请求中有50%在299毫秒内完成 50% 299 //在这100个请求中有66%在312毫秒内完成 66% 312 75% 383 80% 412 90% 431 95% 432 98% 436 99% 437 100% 437 (longest request)