ab

ab是apache自帶的一款功能強大的測試工具

安裝了apache一般就自帶了，

用法可以查看它的說明

$ ./ab

./ab: wrong number of arguments

Usage: ./ab [options] [http://]hostname[:port]/path

Options are:

-n requests Number of requests to perform

-c concurrency Number of multiple requests to make

-t timelimit Seconds to max. wait for responses

-p postfile File containing data to POST

-T content-type Content-type header for POSTing

-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

-h Display usage information (this message)

參數眾多，一般我們用到的是-n 和-c

例如：

./ab -c 1000 -n 100 url

這個表示同時處理1000個請求並運行100次index.php文件.