簡述
偶然情況下看到一款性能測試工具webbench，看着挺不錯的記錄一下安裝過程，在以后項目上線過程中可以壓一壓一些頁面的並發情況，對項目性能有個大致的了解。
原理
webbench首先fork出多個子進程，每個子進程都循環做web訪問測試。子進程把訪問的結果通過pipe告訴父進程，父進程做最終的統計結果百科介紹
安裝過程
[root@node1 ~]# yum install -y gcc ctags
[root@node1 ~]# wget http://www.ha97.com/code/webbench-1.5.tar.gz
[root@node1 ~]# tar -xvf webbench-1.5.tar.gz
[root@node1 data]# cd webbench-1.5
[root@node1 webbench-1.5]# make && make install ##這一步可能遇到如下錯誤，手動創建目錄即可
cc -Wall -ggdb -W -O -c -o webbench.o webbench.c
webbench.c: In function 鈥榓larm_handler鈥
webbench.c:77: warning: unused parameter 鈥榮ignal鈥
cc -Wall -ggdb -W -O -o webbench webbench.o
ctags *.c
install -s webbench /usr/local/bin
install -m 644 webbench.1 /usr/local/man/man1
install: cannot create regular file `/usr/local/man/man1': No such file or directory
make: *** [install] Error 1
[root@node1 webbench-1.5]# mkdir /usr/local/man
[root@node1 webbench-1.5]# mkdir /usr/local/man/man1
[root@node1 webbench-1.5]# make &&make install
make: Nothing to be done for `all'.
install -s webbench /usr/local/bin
install -m 644 webbench.1 /usr/local/man/man1
install -d /usr/local/share/doc/webbench
install -m 644 debian/copyright /usr/local/share/doc/webbench
install -m 644 debian/changelog /usr/local/share/doc/webbench
使用說明 通過webbench --help 命令查看
[root@node1 data]# webbench --help
webbench [option]... URL
-f|--force Don't wait for reply from server.
-r|--reload Send reload request - Pragma: no-cache.
-t|--time <sec> Run benchmark for <sec> seconds. Default 30.
-p|--proxy <server:port> Use proxy server for request.
-c|--clients <n> Run <n> HTTP clients at once. Default one.
-9|--http09 Use HTTP/0.9 style requests.
-1|--http10 Use HTTP/1.0 protocol.
-2|--http11 Use HTTP/1.1 protocol.
--get Use GET request method.
--head Use HEAD request method.
--options Use OPTIONS request method.
--trace Use TRACE request method.
-?|-h|--help This information.
-V|--version Display program version.
使用
不是專業測試，再次使用此工具模擬對一個項目進行壓測，使用兩個參數 c 並發客戶端數，t 運行時長，我們來對http://www.baidu.com 做壓測看測試報告內容
執行命令：webbench -c 10 http://www.baidu.com
命令就是用10個客戶端並發百度網站30秒，但是在執行的命令報錯了：Invalid URL syntax - hostname don't ends with '/'。解決辦法就是在url后加個“/”
執行結果反饋內容：
[root@node1 data]# webbench -c 10 -t 30 http://www.baidu.com/
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.
Benchmarking: GET http://www.baidu.com/
10 clients, running 30 sec.
Speed=2254 pages/min, 4188293 bytes/sec.
Requests: 1110 susceed, 17 failed.