307 lines
6.3 KiB
HTML
307 lines
6.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<!--
|
|
Licensed to the Apache Software Foundation (ASF) under one or more
|
|
contributor license agreements. See the NOTICE file distributed with
|
|
this work for additional information regarding copyright ownership.
|
|
The ASF licenses this file to You under the Apache License, Version 2.0
|
|
(the "License"); you may not use this file except in compliance with
|
|
the License. You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
-->
|
|
|
|
<html>
|
|
<head>
|
|
<link rel="stylesheet" type="text/css" href="../../docs/css/style.css"/>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
|
<title>Apache JMeter - User's Manual: Glossary</title>
|
|
</head>
|
|
<body bgcolor="#ffffff" text="#000000" link="#525D76">
|
|
<table border="0" cellspacing="0">
|
|
<tr>
|
|
<td align="left">
|
|
<a href="http://www.apache.org"><img title="Apache Software Foundation" width="387" height="100" src="../../docs/images/asf-logo.gif" border="0"/></a>
|
|
</td>
|
|
<td align="right">
|
|
<a href="http://jmeter.apache.org/"><img width="221" height="102" src="../../docs/images/logo.jpg" alt="Apache JMeter" title="Apache JMeter" border="0"></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<table border="0" cellspacing="4">
|
|
<tr><td>
|
|
<hr noshade size="1">
|
|
</td></tr>
|
|
<tr>
|
|
<td align="left" valign="top">
|
|
<table>
|
|
<tr>
|
|
<td bgcolor="#525D76">
|
|
<div align="right"><a href="index.html"><font size=-1 color="#ffffff" face="arial,helvetica,sanserif">Index</font></a></div>
|
|
</td>
|
|
<td bgcolor="#525D76">
|
|
<div align="right"><a href="hints_and_tips.html"><font size=-1 color="#ffffff" face="arial,helvetica,sanserif">Prev</font></a></div>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<br>
|
|
<table border="0" cellspacing="0" cellpadding="2" width="100%">
|
|
<tr><td bgcolor="#525D76">
|
|
<font color="#ffffff" face="arial,helvetica,sanserif">
|
|
<a name="glossary"><strong>22. Glossary</strong></a></font>
|
|
</td></tr>
|
|
<tr><td>
|
|
<blockquote>
|
|
<p>
|
|
|
|
|
|
<a name="Elapsed">
|
|
<b>
|
|
Elapsed time
|
|
</b>
|
|
</a>
|
|
. JMeter measures the elapsed time from just before sending the request to
|
|
just after the last response has been received.
|
|
JMeter does not include the time needed to render the response, nor does JMeter process any client code, for example
|
|
Javascript.
|
|
|
|
</p>
|
|
<p>
|
|
|
|
|
|
<a name="Latency">
|
|
<b>
|
|
Latency
|
|
</b>
|
|
</a>
|
|
. JMeter measures the latency from just before sending the request to
|
|
just after the first response has been received. Thus the time
|
|
includes all the processing needed to assemble the request as well as
|
|
assembling the first part of the response, which in general will be longer than one
|
|
byte.
|
|
Protocol analysers (such as Wireshark) measure the time when bytes are actually sent/received over the interface.
|
|
The JMeter time should be closer to that which is experienced by a
|
|
browser or other application client.
|
|
|
|
</p>
|
|
<p>
|
|
|
|
|
|
<a name="Median">
|
|
<b>
|
|
Median
|
|
</b>
|
|
</a>
|
|
is a number which divides the samples into two equal halves.
|
|
Half of the samples are smaller than the median, and half are larger.
|
|
[Some samples may equal the median.]
|
|
This is a standard statistical measure.
|
|
See, for example:
|
|
<a href="http://en.wikipedia.org/wiki/Median">
|
|
Median
|
|
</a>
|
|
entry at Wikipedia.
|
|
The Median is the same as the 50
|
|
<sup>
|
|
th
|
|
</sup>
|
|
Percentile
|
|
|
|
</p>
|
|
<p>
|
|
|
|
|
|
<a name="Percentile">
|
|
<b>
|
|
90% Line (90
|
|
<sup>
|
|
th
|
|
</sup>
|
|
Percentile)
|
|
</b>
|
|
</a>
|
|
is the value below which 90% of the samples fall.
|
|
The remaining samples too at least as long as the value.
|
|
This is a standard statistical measure.
|
|
See, for example:
|
|
<a href="http://en.wikipedia.org/wiki/Percentile">
|
|
Percentile
|
|
</a>
|
|
entry at Wikipedia.
|
|
|
|
</p>
|
|
<p>
|
|
|
|
|
|
<a name="StandardDeviation">
|
|
<b>
|
|
Standard Deviation
|
|
</b>
|
|
</a>
|
|
is a measure of the variability
|
|
of a data set. This is a standard statistical measure.
|
|
See, for example:
|
|
<a href="http://en.wikipedia.org/wiki/Standard_deviation">
|
|
Standard Deviation
|
|
</a>
|
|
entry at Wikipedia.
|
|
JMeter calculates the population standard deviation (e.g. STDEVP function in spreadheets), not the sample standard deviation (e.g. STDEV).
|
|
|
|
</p>
|
|
<p>
|
|
|
|
|
|
<a name="ThreadName">
|
|
The
|
|
<b>
|
|
Thread Name
|
|
</b>
|
|
</a>
|
|
as it appears in Listeners and logfiles
|
|
is derived from the Thread Group name and the thread within the group.
|
|
<br>
|
|
|
|
|
|
The name has the format
|
|
|
|
<code>
|
|
groupName + " " + groupIndex + "-" + threadIndex
|
|
</code>
|
|
|
|
where:
|
|
|
|
<ul>
|
|
|
|
|
|
<li>
|
|
groupName - name of the Thread Group element
|
|
</li>
|
|
|
|
|
|
<li>
|
|
groupIndex - number of the Thread Group in the Test Plan, starting from 1
|
|
</li>
|
|
|
|
|
|
<li>
|
|
threadIndex - number of the thread within the Thread Group, starting from 1
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
A test plan with two Thread Groups each with two threads would use the names:
|
|
|
|
<pre>
|
|
|
|
Thread Group 1-1
|
|
Thread Group 1-2
|
|
Thread Group 2-1
|
|
Thread Group 2-2
|
|
|
|
</pre>
|
|
|
|
|
|
</p>
|
|
<p>
|
|
|
|
|
|
<a name="Throughput">
|
|
<b>
|
|
Throughput
|
|
</b>
|
|
</a>
|
|
is calculated as requests/unit of time.
|
|
The time is calculated from the start of the first sample to the end of the last sample.
|
|
This includes any intervals between samples, as it is supposed to represent the load on the server.
|
|
<br>
|
|
|
|
|
|
The formula is: Throughput = (number of requests) / (total time).
|
|
|
|
</p>
|
|
</blockquote>
|
|
</p>
|
|
</td></tr>
|
|
<tr><td><br></td></tr>
|
|
</table>
|
|
<br>
|
|
<table>
|
|
<tr>
|
|
<td bgcolor="#525D76">
|
|
<div align="right"><a href="index.html"><font size=-1 color="#ffffff" face="arial,helvetica,sanserif">Index</font></a></div>
|
|
</td>
|
|
<td bgcolor="#525D76">
|
|
<div align="right"><a href="hints_and_tips.html"><font size=-1 color="#ffffff" face="arial,helvetica,sanserif">Prev</font></a></div>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
<tr><td>
|
|
<hr noshade size="1">
|
|
</td></tr>
|
|
<tr>
|
|
<td>
|
|
<table width=100%>
|
|
<tr>
|
|
<td>
|
|
<font color="#525D76" size="-1"><em>
|
|
Copyright © 1999-2013, Apache Software Foundation
|
|
</em></font>
|
|
</td>
|
|
<td align="right">
|
|
<font color="#525D76" size="-1"><em>
|
|
$Id: glossary.xml 1175606 2011-09-25 22:28:22Z sebb $
|
|
</em></font>
|
|
</td>
|
|
</tr>
|
|
<tr><td colspan="2">
|
|
<div align="center"><font color="#525D76" size="-1">
|
|
Apache, Apache JMeter, JMeter, the Apache feather, and the Apache JMeter logo are
|
|
trademarks of the Apache Software Foundation.
|
|
</font>
|
|
</div>
|
|
</td></tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</body>
|
|
</html>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|