linux ab命令使用介紹，linuxab命令介紹

linux ab命令使用介紹，linuxab命令介紹

1、做壓力測試的工具：ab

2、效能的監控工具：nmon

查看下linux主機上的ulimit -n 的資料，沒有改動過的是1024，最好要改的大一點。這個是linux下最大線程數，如果過小的話無法進行大並量的測試。

ab經行壓力測試時的指令碼我用的形式為：

1.（get方式）./ab -n 1000 -c 1000 -k https://localhost/hello.php

2.（post方式./ab -n 2500 -c 2500 -k -p postfile https://localhost/hello.php

其中參數n為請求的次數，c為一次請求的並發次數，-k為keep_alive,一般出現連結被重設的錯誤時最好帶上-k的參數。

還有好多參數，可以在ab--help中看下(這個是超級秘籍)。

Usage: ab [options] [http[s]://]hostname[:port]/pathOptions are:    -n requests     Number of requests to perform    -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)