ab - Apache HTTP server benchmarking tool is a linux shell software useful to perform a performance benchmark of a webpage of a website.
sudo apt-get install apache2-utils
The following command says that the ab command will execute 1000 times 10 concurrent access to the webpage with address http://wiki.altervista.org/cs/ab (this webpage). Results will be stored in the file test.dat.
ab -n 1000 -c 10 -g test.dat "http://wiki.altervista.org/cs/ab"
the output of this command is:
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 wiki.altervista.org (be patient) Completed 100 requests Completed 200 requests Completed 300 requests Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests Completed 800 requests Completed 900 requests Completed 1000 requests Finished 1000 requests Server Software: Apache Server Hostname: wiki.altervista.org Server Port: 80 Document Path: /cs/ab Document Length: 8951 bytes Concurrency Level: 10 Time taken for tests: 18.740 seconds Complete requests: 1000 Failed requests: 0 Write errors: 0 Total transferred: 9430688 bytes HTML transferred: 8958746 bytes Requests per second: 53.36 [#/sec] (mean) Time per request: 187.403 [ms] (mean) Time per request: 18.740 [ms] (mean, across all concurrent requests) Transfer rate: 491.44 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 20 25 7.0 23 82 Processing: 71 162 80.9 140 398 Waiting: 50 135 78.5 111 372 Total: 92 187 81.7 164 421 Percentage of the requests served within a certain time (ms) 50% 164 66% 220 75% 251 80% 267 90% 304 95% 334 98% 372 99% 402 100% 421 (longest request)