Pages

搜尋此網誌

2013年12月25日 星期三

ubuntu 中安装 apache ab 進行壓力測試

ubuntu 中安装 apache ab 進行壓力測試

資料來源: ubuntu 中安装 apache ab 來進行簡單的壓力測試

在 ubuntu 底下安裝 apache ab 很簡單:

apt-get install apache2-utils

我們可以透過以下指令來做簡單測試:

ab -n 100 -c 10 http://localhost:8080/

其中關於 ab 其他指令的運用可以參考 man

Usage: ab [options] [http[s]://]hostname[:port]/path Options are:

//總需求數
-n requests Number of requests to perform宅 

//一次同時併發的請求數 總的請求數(n)=次數*一次併發數(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)

實際的運行報告呈現如下:

Server Software: lighttpd/1.4.20
Server Hostname: hikin.iteye.com
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個併發請求看成一個整體 
Time per request: 330.335 [ms] (mean)

//平均每個併發請求處理 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)

以往要用人工來進行測試,使用 apache ab 可以很快速的完成,讓壓力測試不再是個黑盒子,永遠不知道到底系統運行效率如何。

張貼留言