http压测工具

# 安装
git clone https://github.com/wg/wrk && cd wrk && make && cp wrk /usr/local/bin/

使用方法: wrk <选项> <被测HTTP服务的URL>                            
  Options:                                            
    -c, --connections <N>  跟服务器建立并保持的TCP连接数量  
    -d, --duration    <T>  压测时间           
    -t, --threads     <N>  使用多少个线程进行压测   
                                                      
    -s, --script      <S>  指定Lua脚本路径       
    -H, --header      <H>  为每一个HTTP请求添加HTTP头      
        --latency          在压测结束后，打印延迟统计信息   
        --timeout     <T>  超时时间     
    -v, --version          打印正在使用的wrk的详细版本信息
                                                      
  <N>代表数字参数，支持国际单位 (1k, 1M, 1G)
  <T>代表时间参数，支持时间单位 (2s, 2m, 2h)

# wrk -t8 -c200 -d30s --latency  "http://www.bing.com"

Running 30s test @ http://www.bing.com
  8 threads and 200 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     2.94ms    5.71ms 414.75ms   99.80%
    Req/Sec     9.02k   414.37     9.78k    79.31%
  Latency Distribution
     50%    2.79ms
     75%    3.03ms
     90%    3.30ms
     99%    4.39ms
  2155050 requests in 30.10s, 646.91MB read
Requests/sec:  71597.89 （平均每秒处理完成71597.89个请求）
Transfer/sec:     21.49MB

# 安装
yum install -y httpd-tools
参数n为请求的次数，c为一次请求的并发次数 t为请求时间

# ab -h
Usage: ab [options] [http[s]://]hostname[:port]/path
Options are:
    -n requests     Number of requests to perform
    -c concurrency  Number of multiple requests to make at a time
    -t timelimit    Seconds to max. to spend on benchmarking
                    This implies -n 50000
    -s timeout      Seconds to max. wait for each response
                    Default is 30 seconds
    -b windowsize   Size of TCP send/receive buffer, in bytes
    -B address      Address to bind to when making outgoing connections
    -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 to use for POST/PUT data, 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.
    -q              Do not show progress when doing more than 150 requests
    -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
                    (SSL3, TLS1, TLS1.1, TLS1.2 or ALL)

# ab -n 1000 -c 100 http://localhost/index.html
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking localhost (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        nginx/1.10.1
Server Hostname:        localhost
Server Port:            80

Document Path:          /index.html
Document Length:        12 bytes

Concurrency Level:      100     ###并发数
Time taken for tests:   0.301 seconds   ###共使用了多少时间
Complete requests:      1000   ###请求数
Failed requests:        0   ###失败数
Write errors:           0
Total transferred:      263538 bytes
HTML transferred:       13068 bytes
Requests per second:    3324.49 [#/sec] (mean)    ###每秒多少请求，这个是非常重要的参数数值，服务器的吞吐量
Time per request:       30.080 [ms] (mean)  ##用户平均请求等待时间
Time per request:       0.301 [ms] (mean, across all concurrent requests)   ##服务器平均处理时间，也就是服务器吞吐量的倒数
Transfer rate:          855.60 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        9   13   2.2     13      18
Processing:     9   14   2.5     15      27
Waiting:        0    7   3.1      7      16
Total:         22   28   2.6     27      41

Percentage of the requests served within a certain time (ms)
  50%     27   50%的请求在27ms内返回 
  66%     29   60%的请求在29ms内返回
  75%     29
  80%     30
  90%     31
  95%     31
  98%     32
  99%     41
 100%     41 (longest request)

Usage: hey [options...] <url>

Options:
  -n  Number of requests to run. Default is 200.
  -c  Number of requests to run concurrently. Total number of requests cannot
      be smaller than the concurrency level. Default is 50.
  -q  Rate limit, in queries per second (QPS). Default is no rate limit.
  -z  Duration of application to send requests. When duration is reached,
      application stops and exits. If duration is specified, n is ignored.
      Examples: -z 10s -z 3m.
  -o  Output type. If none provided, a summary is printed.
      "csv" is the only supported alternative. Dumps the response
      metrics in comma-separated values format.

  -m  HTTP method, one of GET, POST, PUT, DELETE, HEAD, OPTIONS.
  -H  Custom HTTP header. You can specify as many as needed by repeating the flag.
      For example, -H "Accept: text/html" -H "Content-Type: application/xml" .
  -t  Timeout for each request in seconds. Default is 20, use 0 for infinite.
  -A  HTTP Accept header.
  -d  HTTP request body.
  -D  HTTP request body from file. For example, /home/user/file.txt or ./file.txt.
  -T  Content-type, defaults to "text/html".
  -a  Basic authentication, username:password.
  -x  HTTP Proxy address as host:port.
  -h2 Enable HTTP/2.

  -host	HTTP Host header.

  -disable-compression  Disable compression.
  -disable-keepalive    Disable keep-alive, prevents re-use of TCP
                        connections between different HTTP requests.
  -disable-redirects    Disable following of HTTP redirects
  -cpus                 Number of used cpu cores.
                        (default for current machine is 8 cores)

# hey -n 1000 -c 200 http://www.weibo.com

Summary:
  Total:	1.5331 secs
  Slowest:	1.0570 secs
  Fastest:	0.0535 secs
  Average:	0.1049 secs
  Requests/sec:	652.2805


Response time histogram:
  0.053 [1]	|
  0.154 [797]	|■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■
  0.254 [62]	|■■■
  0.355 [139]	|■■■■■■■
  0.455 [0]	|
  0.555 [0]	|
  0.656 [0]	|
  0.756 [0]	|
  0.856 [0]	|
  0.957 [0]	|
  1.057 [1]	|


Latency distribution:
  10% in 0.0587 secs
  25% in 0.0608 secs
  50% in 0.0642 secs
  75% in 0.0729 secs
  90% in 0.2701 secs
  95% in 0.2787 secs
  99% in 0.2905 secs

Details (average, fastest, slowest):
  DNS+dialup:	0.0203 secs, 0.0535 secs, 1.0570 secs
  DNS-lookup:	0.0037 secs, 0.0000 secs, 0.0400 secs
  req write:	0.0002 secs, 0.0000 secs, 0.0125 secs
  resp wait:	0.0487 secs, 0.0413 secs, 0.0755 secs
  resp read:	0.0002 secs, 0.0001 secs, 0.0036 secs

Status code distribution:
  [200]	1000 responses