linux下 使用apache2 ab 测试进行压力测试

apt-get install apache2-utils

Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:

//总的请求数
-n requests Number of requests to perform宅

//一次同时并发的请求数 总的请求数(n)=次数*一次并发数(c)
-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)

ab -c10 -n1000 http://localhost/index.php[/code] 
4、结果和分析

Document Path:          /index.php
Document Length:        10 bytes

Concurrency Level:      10
Time taken for tests:   0.088 seconds
Complete requests:      1000
Failed requests:        0
Total transferred:      198000 bytes
HTML transferred:       10000 bytes
Requests per second:    11365.83 [#/sec] (mean)
Time per request:       0.880 [ms] (mean)
Time per request:       0.088 [ms] (mean, across all concurrent requests)
Transfer rate:          2197.69 [Kbytes/sec] received

Connection Times (ms)
min  mean[+/-sd] median   max
Connect:        0    0   0.1      0       1
Processing:     0    1   0.3      1       4
Waiting:        0    1   0.3      0       4
Total:          1    1   0.3      1       4
ERROR: The median and mean for the waiting time are more than twice the standard
deviation apart. These results are NOT reliable.

Percentage of the requests served within a certain time (ms)
50%      1
66%      1
75%      1
80%      1
90%      1
95%      1
98%      2
99%      2
100%      4 (longest request)


5、测试结论中常用的一个指标就是qps，也就是每秒钟响应了好多个请求

Requests per second:    11365.83 [#/sec] (mean)