Apache JMeter 壓力測試 Mobile API

Hello 大家好!!!

記得上一節是介紹如何用 WAPT 做壓測 Mobile API。這一節我們就來介紹一下如何用 Apache JMeter 做 Mobile API 的壓力測試。

在開始實做之前，我們先來介紹一下 Apache JMeter：

1. 100%由 Java 開發的測是工具。
2. 開放原碼軟體 (Open Source)。
3. 支援效能測試、功能測試和負載測試。
4. 原先設計做 Web 測試，現在已延伸可以做其它功能測試。
5. 對附載及效能測，支援多項服務和協定：HTTP, HTTPS, SOAP, REST, FTP, JDBC, LDAP, JMS, SMTP, POP3, IMAP, NoSQL, Commands, Shell Scripts and TCP...
6. GUI介面方便建立測試計畫和除錯。
7. 高擴充性核心等等...

缺點：

1. JMeter 並不像瀏覽器可以執行 CSS 或 JavaScript 等等瀏覽器語言。
2. 因受 thread 的限制，所以無法長時間執行測試。
3. Debug 較不易。
4. 測試報告不夠完整性。
5. 需要安裝 JRE 6 以上版本才能執行。 

現在就來開始我們這一節的實作說明：

Step 1: Download JRE from the official website.
https://www.java.com/en/download/ie_manual.jsp?locale=en

Step 2: Install JRE from download folder then double click the installation file "JavaSetup8u45.exe"

Step 3: Click "Yes" for continuous.

Step 4: Click "Install" for the installation.

Step 5: Un-tick the check box then click "Next"

Step 6: Click "Close" for finished the JRE installation.

Step 7: Download from the link as below or the official website.

apache-jmeter-2.13.zip

http://jmeter.apache.org/download_jmeter.cgi

Step 8: Unzip file "apache-jmeter-2.13.zip"

Step 9: Double click the file "jmeter.bat" for start JMetrer.
C:\"Download Folder" \apache-jmeter-2.13\bin

Step 10: Show the JMeter main GUI as below.

Step 11: Create the first test plan.
Test Plan | Add | Threads(Users) | Thread Group

Step 12: Set every 5 seconds(blue), ramp-up 5 VUs(yellow) and loop 100 times(red) then total 500 VUs.

Step 13: If want to repeat the VUs for this test plan set in red. For our case just set loop 1 time means doesn't want any VUs to do repeat test.
Thread Group | Add | Logic Controller | Loop Controller

Step 14: If need to test more APIs for HTTP Request, we can set the defaults for the HTTP Request then separate the APIs HTTP Request. For our case just create a "HTTP Request Defaults" don't do any setup with this.
Loop Controller | Add | Config Element | HTTP Request Defaults

Step 15: Create the API "HTTP Request"
Loop Controller | Add | Sampler | HTTP Request

Step 16: Set IP for HTTP server in red, Path in green and API parameters in blue. Click "Add" in yellow to add the parameters.

Step 17: Create the graph results.
Loop Controller | Add | Listener | Graph Results

Step 18: Create the results tree for recording the results bit by bit.
Loop Controller | Add | Listener | View Results Tree

Step 19: Click the icon   on navigation bar to save this test plan.

Step 20: Click the icon  to start the test plan.

Step 21: Click the icon  to clear all results.

Step 22: Graph Results of "No of Samples" means total requests, "Average" means average of response time, "Deviation" means deviation of response time if the number near 0 will be the best. "Throughput /minute" means per minute of response requests if the number much higher will be the better of the performance.

Step 23: List of Results Tree.

Step 24: Check the back-end of management GUI page to verify the requests.

介紹到這裡相信各位對於 JMeter 這套壓測工具，應該有了初步的認識和基本的使用方式。

這套壓測工具就如同上圖所見，並沒有很清楚或漂亮的圖形表現，這也是 Freeware 的測試工具普遍存在的問題，但是就單純的以一個實用性的壓力測試工具來說，JMeter 的測試表現算是一個蠻專業的測試工具，唯一的缺點就是在製作測試報告時，需要花較多的時間在圖表和測試報告的說明上面。

這一節 JMeter 的說明我們就先介紹到這裡，以後如果還有需要，我們再來做更深入的說明。那我們就下次見~ 掰掰!!!

~ See you ~

參考出處：
https://www.java.com/
http://jmeter.apache.org/