JMeter如何收集獲得伺服器cpu，記憶體，磁碟，網路等相關資源使用率的資訊

1. JMeter 自帶的Monitor Results 監控

The monitor was designed to work with the status servlet in Tomcat 5. In theory, any servlet container that supports JMX (Java Management Extension) can port the status servlet to provide the same information.

這個是原文， 我也沒搞太懂，大概就是需要tomcat 或者 支援JMX 的servlet 都可以提供監控服務，詳細的我也沒有測試，應為我沒有這個東西，對tomcat也不熟，所以。。。。

我大概說一下我的的理解：

1. 開啟伺服器自帶的顯示效能的頁面 （官網的例子是 ：/manager/status 頁面）

2. 在Jmeter 裡面新增訪問這個頁面

3. 新增Monitor Result 監視器，就可以讀取出相關資訊了

2. 第三方的外掛形式監控伺服器效能資料

這個外掛非常之利害，使用也是非常之方便，功能也是非常多，這裡講的這個監控伺服器效能資料的叫 PerfMon Metrics Collector， 還有其他功能：

    PerfMon Metrics Collector
    Active Threads Over Time
    Response Codes per Second
    Response Times Over Time
    Response Latencies Over Time
    Transactions per Second
    Server Hits per Seconds
    Bytes Throughput Over Time
    Extracted Data Over Time
    Composite Timeline Graph

這個是外掛的官方地址 ：  http://code.google.com/p/jmeter-plugins/，  現在已經V0.5.5了

我講下PerfMon Metrics Collector的使用。

PerffMon 的結構圖：

下面是操作過程：

1. 下載外掛

2. 解壓外掛檔案， 裡面有個JMeterPlugins.jar 把這個檔案放到 lib/ext 資料夾下面

3. 開啟bin/Jmeter.properties

修改 

<span class="pln">jmeter</span><span class="pun">.</span><span class="pln">save</span><span class="pun">.</span><span class="pln">saveservice</span><span class="pun">.</span><span class="pln">thread_counts</span><span class="pun">=</span><span class="kwd">true</span>

外掛相關的設定可以新增到 bin/user.properties

<span class="com">#---------------------------------------------------------------------------</span><span class="pln">
</span><span class="com"># JMeter Plugins config (http://code.google.com/p/jmeter-plugins)</span><span class="pln">
</span><span class="com">#---------------------------------------------------------------------------</span><span class="pln">

</span><span class="com"># Enable or disable the gradient paint for graphs. Value is true or false, default is true.</span><span class="pln">
jmeterPlugin</span><span class="pun">.</span><span class="pln">drawGradient</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
</span><span class="com"># Globaly disable final zeroing lines in all graphs. Value is true or false, default is false.</span><span class="pln">
jmeterPlugin</span><span class="pun">.</span><span class="pln">neverDrawFinalZeroingLines</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
</span><span class="com"># Globaly disable current X lines drawing in all concerned graphs. Value is true or false,  default is false.</span><span class="pln">
jmeterPlugin</span><span class="pun">.</span><span class="pln">neverDrawCurrentX</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
</span><span class="com"># Enable or disable graphs Y Axis scaling for better readability. Value is true or false, default is true.</span><span class="pln">
jmeterPlugin</span><span class="pun">.</span><span class="pln">optimizeYAxis</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
</span><span class="com"># Use relative time in time based graphs. Value is true or false, default is true.</span><span class="pln">
jmeterPlugin</span><span class="pun">.</span><span class="pln">useRelativeTime</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
</span><span class="com"># Force csv separator character. Default is ',' if decimal separator is '.', ';' otherwise</span><span class="pln">
</span><span class="com">#jmeterPlugin.csvSeparator=;</span><span class="pln">
</span><span class="com"># Force csv time format (see http://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html)</span><span class="pln">
</span><span class="com">#jmeterPlugin.csvTimeFormat=HH:mm:ss</span><span class="pln">
</span><span class="com"># Prefix or not plugin items in JMeter menus. Value is true or false, default is true.</span><span class="pln">
jmeterPlugin</span><span class="pun">.</span><span class="pln">prefixPlugins</span><span class="pun">=</span><span class="kwd">true</span><span class="pln">
</span><span class="com"># Force line width for all line graphs. Default is '1.0'.</span><span class="pln">
jmeterPlugin</span><span class="pun">.</span><span class="pln">graphLineWidth</span><span class="pun">=</span><span class="lit">3</span><span class="pln">
</span><span class="com"># Draw markers in relevent line graphs. Default is true.</span><span class="pln">
meterPlugin</span><span class="pun">.</span><span class="pln">drawLineMarker</span><span class="pun">=</span><span class="kwd">false</span>

4. 開啟JMeter 看到多了好多以[email protected]- 開頭的控制元件，包括controller， thread 等， 這裡要講的 PerfMon Metrics Collector 就在listener 下面[email protected]-PerfMon Metrics Collector

5. 在你需要的地方新增 [email protected]-PerfMon Metrics Collector， 點configur， 選擇"Save Active Thread Counts" 。

6.上面這些做完，還有一個非常重要的東西需要做， 那就是在你的伺服器端執行一個外掛的伺服器，這樣JMeter 就可以獲得相關資料了， 這個伺服器就在下載的安裝包裡面 有個 serverAgent 的資料夾，把它複製到伺服器，執行裡面的serverAgent.bat

7. 接下來你就可以在你新增的[email protected]-PerfMon Metrics Collector 裡面新增你要監控的伺服器了，包括伺服器地址，埠預設為4444， 和你要監控的選項了，比如，cpu, 記憶體，網路吞吐，磁碟吞吐等