Linux AB command usage introduction, linuxab command Introduction

Linux AB command usage introduction, linuxab command Introduction

1. Tools for stress testing: AB

2. Performance monitoring tool: nmon

Check the ulimit-n data on the linux host. The number of records that have not been changed is 1024. You 'd better change the value to a larger value. This is the maximum number of threads in linux. If it is too small, a large concurrent test cannot be performed.

The script used for stress testing by AB is as follows:

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

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

Here, parameter n is the number of requests, c is the number of concurrent requests, and-k is keep_alive. Generally, when a link is reset, it is best to include the-k parameter.

There are also many parameters, which can be viewed in AB -- help (this is a super secret ).

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)