最後更新: 2019-06-12

介紹

 

ab - Apache HTTP server Benchmarking tool (ApacheBench)

目錄

• 安裝
• System Settings (nofile)
• Usage
• Useful options
• POST & PUT
• Example

 

---

安裝

 

# U12

apt-get install apache2-utils

獲得: /usr/bin/ab

# Rocky 8

dnf install httpd-tools    # 會自動安了 apr, apr-util ...

 

---

System Settings (nofile)

 

在 benchmark 時見到

socket: Too many open files (24)

解決

[一次性]

ulimit -n 20000

[永久]

echo -ne "
* soft nofile 65536
* hard nofile 65536
" >> /etc/security/limits.conf

 

---

Usage

 

ab [options] [http[s]://]hostname[:port]/path

Example

# -n requests        # Number of requests to perform

# -c concurrency   # Number of multiple requests to make

ab -n 1000 -c 10 http://server/

 

---

Useful options

 

# Maximum number of seconds to wait before the socket timeout. Default is 30 seconds.

-s timeout

# Maximum number of seconds to spend for benchmarking. (This implies a -n 50000 internally)

-t timelimit   

# Supply BASIC Authentication credentials to the server.

-A auth-username:password

# Add a Cookie: line to the request.

-C cookie-name=value

 

---

POST & PUT

   

-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'
 

---

Example

 

# 保持 100 條連線, 直到完成 4000 個連線

ab -n 10000 -c 100 https://datahunter.org/

Benchmarking datahunter.org (be patient)
Completed 400 requests      # 每 n/c report 1 次
Completed 800 requests
...

測試完成後

Concurrency Level:      100
Time taken for tests:   21.662 seconds
Complete requests:      10000
Failed requests:        0
Non-2xx responses:      10000
Total transferred:      3980000 bytes
HTML transferred:       0 bytes
Requests per second:    461.65 [#/sec] (mean)
Time per request:       216.616 [ms] (mean)
Time per request:       2.166 [ms] (mean, across all concurrent requests)
Transfer rate:          179.43 [Kbytes/sec] received

說明: Time per request

(mean)

# average amount of time it took for a 'concurrent group' of requests to process

Time taken for tests / (Complete requests /Concurrency Level)  = 21662 / (10000/100) = 2.166 [ms]

 (mean, across all concurrent requests)

average amount of time it took for a 'single' request

"Time taken for tests" / "Complete requests"  = 21.662 / 10000 = 2.166 [ms]

/server-status

...
2.57 requests/sec - 275.3 MB/second - 107.1 MB/request - 27724.2 ms/request
102 requests currently being processed, 148 idle workers

"requests/sec" 與 "requests currently" 係有分別的

requests/sec

This is the average number of requests that the server is processing per second.
It is calculated over the lifetime of the server.

requests currently

This includes requests that are actively being processed
 as well as requests that are in the server's queue waiting to be processed.

詳見: mod_status