ab的用法

E:\Test tool\ab>ab
ab: wrong number of arguments
Usage: ab [options] [http://]hostname[:port]/path
Options are:

//请求数
    -n requests     Number of requests to perform

//并发请求数
    -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 als
    -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-Enc
                    Inserted after all normal header lines. (r
    -A attribute    Add Basic WWW Authentication, the attribut
                    are a colon separated username and passwor
    -P attribute    Add Basic Proxy Authentication, the attrib
                    are a colon separated username and passwor
    -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 warn
    -g filename     Output collected data to gnuplot format fi
    -e filename     Output CSV file with percentages served
    -r              Don't exit on socket receive errors.
    -h              Display usage information (this message)