Apache 壓力測試

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在 apache 本身的套件中, 有個叫 ab(ApacheBench) 的程式.
ApacheBench 主要是用來測試 apache 執行效率.

ab 參數:
Usage: /usr/sbin/ab [options] [http[s]://]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 containg 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: zop'
                    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
    -s              Use httpS instead of HTTP (SSL)
    -h              Display usage information (this message)

ex: 要執行 1000 次的 connection, 20 次的 concurrent (並行, 同時).

語法: ab -n 1000 -c 20 http://localhost/abc.php

產生出來的結果. 主要要注意的是以下幾個.

Time taken for tests: 總共執行花了多久的時間.(以上 1000 次共多久)

Requests per second: 每秒平均可以處理多少個 connection.