1.安裝ab命令
sudo apt-get install apache2-utils
2.ab命令參數說明
Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:
//總的請求數
-n requests Number of requests to perform宅
//一次同時並發的請求數 總的請求數(n)=次數*一次並發數(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.運行 ab -n 100 -c 10 http://www.meetu.hk/ 對 http://www.meetu.hk/ 進行100次請求，10個並發請求壓力測試結果。
Server Software: lighttpd/1.4.20
Server Hostname: www.meetu.hk
Server Port: 80
Document Path: /
Document Length: 2095 bytes
Concurrency Level: 10
//整個測試持續的時間
Time taken for tests: 3.303 seconds
//完成的請求數量
Complete requests: 100
Failed requests: 0
Write errors: 0
Total transferred: 235200 bytes
HTML transferred: 209500 bytes
//平均每秒處理30個請求
Requests per second: 30.27 [#/sec] (mean)
//平均每個請求處理時間為330毫秒 注:這裡將一次10個並發請求看成一個整體
Time per request: 330.335 [ms] (mean)
//平均每個並發請求處理 時間 為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)
//在這100個請求中有50%在299毫秒內完成
50% 299
//在這100個請求中有66%在312毫秒內完成
66% 312
75% 383
80% 412
90% 431
95% 432
98% 436
99% 437
100% 437 (longest request)
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