242 lines
14 KiB
HTML
242 lines
14 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Real time server statistics" />
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<meta name="abstract" content="This topic provides information about the real time server statistics support for HTTP Server (powered by Apache)." />
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<meta name="description" content="This topic provides information about the real time server statistics support for HTTP Server (powered by Apache)." />
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<meta name="DC.Relation" scheme="URI" content="rzaieconcepts.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2002,2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2002,2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzaieconserverstat" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Real time server statistics</title>
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</head>
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<body id="rzaieconserverstat"><a name="rzaieconserverstat"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Real time server statistics</h1>
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<div><p>This topic provides information about the real time server statistics
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support for HTTP Server (powered by Apache).</p>
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<div class="important"><span class="importanttitle">Important:</span> Information
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for this topic supports the latest PTF levels for HTTP Server for i5/OS .
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It is recommended that you install the latest PTFs to upgrade to the latest
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level of the HTTP Server for i5/OS. Some of the topics documented here are
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not available prior to this update. See <a href="http://www-03.ibm.com/servers/eserver/iseries/software/http/services/service.html" target="_blank">http://www.ibm.com/servers/eserver/iseries/software/http/services/service.htm</a> <img src="www.gif" alt="Link outside Information Center" /> for more information. </div>
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<p>Real time server statistics provide information on HTTP Server (powered
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by Apache) performance. Server statistics can be viewed with the <span class="uicontrol">Real
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Time Server Statistics</span> tool available through the <span>IBM<sup>®</sup> Web Administration for i5/OS™ interface</span>.
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Only statistics for running HTTP Servers (powered by Apache) can be viewed.
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Data is collected from the primary server job only. </p>
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<p>The header information for the active server displays the following: </p>
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<dl><dt class="dlterm">Server name</dt>
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<dd>Displays the name of the active server. The user-defined name was specified
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during the creation of the server.</dd>
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</dl>
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<dl><dt class="dlterm">Job</dt>
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<dd>Displays the job name for the active server.</dd>
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</dl>
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<dl><dt class="dlterm">Server started</dt>
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<dd>Displays the date and time the server was started.</dd>
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</dl>
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<dl><dt class="dlterm">Current time</dt>
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<dd>Displays the date and time of the last manual or automatic refresh of
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the statistical information.</dd>
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</dl>
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<p>Statistical information can be refreshed manually by clicking <span class="uicontrol">Refresh</span> or
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can be automatically refreshed by selecting a refresh rate from the <span class="uicontrol">Refresh
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Interval</span> drop-down menu.</p>
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<div class="note"><span class="notetitle">Note:</span> Statistical information is cumulative. If a value is greater than 2<sup>64</sup>-1
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in any column, the value will reset to 0. All values will reset to 0 if the
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server is stopped and then started. The type of information displayed is
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dependent on the activity of the HTTP Server (powered by Apache) and what
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functions are enabled. Only statistical information for enabled or active
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functions are displayed. Each column heading identifies what enabled function
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or associated server is being surveyed for statistical information.</div>
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<p>Each column heading identifies what enabled function or associated server
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is being surveyed for statistical information. Statistical information is
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obtained for the following functions: </p>
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<dl><dt class="dlterm">Server handled</dt>
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<dd>This column displays the number of completed server transactions by the
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HTTP Server (powered by Apache) since the server was started. For example,
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completed transactions for static HTML pages, HTML pages containing Server
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Side Include (SSI), and images.</dd>
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</dl>
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<dl><dt class="dlterm">Proxy</dt>
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<dd>This column displays the number of completed server transactions that
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used proxy since the server was started. Proxy statistics are only available
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if proxy is enabled. See <a href="rzaieproxytypes.htm">Proxy server types and uses for HTTP Server (powered by Apache)</a> for
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more information.</dd>
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</dl>
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<dl><dt class="dlterm">CGI</dt>
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<dd>This column displays the number of completed server transactions that
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were handled as Common Gateway Interface (CGI) since the server was started.
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CGI statistics are only available if CGI is enabled. See <a href="rzaieconfigcgi.htm">Set up CGI programs for HTTP Server (powered by Apache)</a> for more information.</dd>
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</dl>
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<dl><dt class="dlterm">Using SSL</dt>
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<dd>This column displays the number of completed server transactions that
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used Secure Sockets Layer (SSL) since the server was started. SSL statistics
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are only available if SSL is enabled. See <a href="rzaiejklenablessl.htm">JKL Toy company enables Secure Sockets Layer (SSL) protection on HTTP Server (powered by Apache)</a> for more information.</dd>
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</dl>
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<dl><dt class="dlterm">WebSphere<sup>®</sup></dt>
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<dd>This column displays the number of completed server transactions that
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used an associated application server since HTTP Server (powered by Apache)
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was started. If the associated application server is not running, the information
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will still be displayed but will equal '0'. WebSphere statistics are only
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available if a WebSphere Application Server is associated with an HTTP Server
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(powered by Apache). </dd>
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</dl>
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<dl><dt class="dlterm">Tomcat</dt>
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<dd>This column displays the number of completed server transactions that
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used an in-process or out-of-process ASF Tomcat server since HTTP Server (powered
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by Apache) was started. See <a href="rzaietomcat.htm">About Tomcat</a> for
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more information.</dd>
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</dl>
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<dl><dt class="dlterm">Customer module</dt>
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<dd>This column displays the number of completed server transactions that
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used a customer or third-party module. A customer module is a user module
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incorporated as a service program into the HTTP Server (powered by Apache).
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See <a href="rzaiethrdprtymod.htm">Set up third party modules for HTTP Server (powered by Apache)</a> for more information.</dd>
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</dl>
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<dl><dt class="dlterm">FRCA Stats</dt>
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<dd>This column displays the number of completed server transactions that
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used Fast Response Cache Accelerator (FRCA) since the server was started.
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FRCA statistics are only available if FRCA is enabled. See <a href="rzaieconfrca.htm">Fast Response Cache Accelerator (FRCA) for HTTP Server (powered by Apache)</a> for more information.</dd>
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</dl>
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<dl><dt class="dlterm">FRCA Proxy </dt>
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<dd>This column displays the number of completed server transactions that
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used Fast Response Cache Accelerator (FRCA) proxy since the server was started.
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FRCA statistics are only available if FRCA is enabled. See <a href="rzaieconfrca.htm">Fast Response Cache Accelerator (FRCA) for HTTP Server (powered by Apache)</a> for more information.</dd>
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</dl>
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<div class="section"><h4 class="sectiontitle">General</h4><p>The general statistical information displays
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basic information about the active server since the server was started. Statistical
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information displayed includes the following: </p>
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<dl><dt class="dlterm">Active threads </dt>
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<dd>Displays the number of currently active threads on the server. A thread
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is an independent unit of work within a job that uses many of the jobs resources
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to complete work. The difference between jobs and threads is that threads
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run within the job helping it to finish its work. Every active job has at
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least one thread, which is called an <dfn class="term">initial thread</dfn>. The initial
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thread is created as part of starting the job. The use of threads within a
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job allows many things to be done at once. For example, while a job is processing,
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a thread may retrieve and calculate data needed by the job to finish processing.</dd>
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</dl>
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<dl><dt class="dlterm">Idle threads </dt>
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<dd>Displays the number of currently idle threads active on the server. An
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idle thread is a portion of a program that is waiting for either a response
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or a request before it can continue. Idle threads are most often waiting for
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an HTTP request to process. </dd>
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</dl>
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<dl><dt class="dlterm">Normal connections </dt>
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<dd>Displays the number of total normal (non-secure) connections currently
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active. </dd>
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</dl>
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<dl><dt class="dlterm">SSL connections </dt>
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<dd>Displays the number of total SSL (secure) connections currently active. </dd>
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</dl>
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<dl><dt class="dlterm">Requests </dt>
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<dd>Displays the number of total requests to the server since the server was
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started. </dd>
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</dl>
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<dl><dt class="dlterm">Responses </dt>
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<dd>Displays the number of total responses from the server since the server
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was started. </dd>
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</dl>
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<dl><dt class="dlterm">Requests rejected </dt>
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<dd>Displays the number of total rejected requests issued by the server since
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the server was started. </dd>
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</dl>
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</div>
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<div class="section"><h4 class="sectiontitle">Absolute and Delta</h4><p>The absolute and delta information
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displays statistical information about currently enabled functions or associated
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servers. The <dfn class="term">absolute value</dfn> is a measurement of the total transactions
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since the server was started. The <dfn class="term">delta value</dfn> is a measurement
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of the total transactions since the server statistics were refreshed. The
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absolute and delta statistical information may be displayed separately or
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side by side for comparison. Connections are not the same thing as a request
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or response transaction. Connection are only recorded for new inbound connections
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to the server. Each column heading identifies what enabled function or associated
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server is being surveyed for statistical information. Each row identifies
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what statistical information is being retrieved. Statistical information displayed
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for each column includes:</p>
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<dl><dt class="dlterm">Requests</dt>
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<dd>Displays the number of requests to the enabled function or associated
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server identified at the top of the column. </dd>
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</dl>
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<dl><dt class="dlterm">Responses </dt>
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<dd>Displays the number of responses sent by the enabled function or associated
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server identified at the top of the column. </dd>
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</dl>
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<dl><dt class="dlterm">Error responses </dt>
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<dd>Displays the number of error responses sent by the enabled function or
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associated server identified at the top of the column. An error response example
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is the 404 "Page Not Found" response. </dd>
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</dl>
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<dl><dt class="dlterm">Non-cache responses </dt>
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<dd>Displays the number of non-cached responses sent by the enabled function
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or associated server identified at the top of the column. </dd>
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</dl>
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<dl><dt class="dlterm">Cache responses </dt>
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<dd>Displays the number of local memory cached responses sent by the enabled
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function or associated server identified at the top of the column. </dd>
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</dl>
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<dl><dt class="dlterm">Bytes received </dt>
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<dd>Displays the number of bytes received by the enabled function or associated
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server identified at the top of the column. </dd>
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</dl>
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<dl><dt class="dlterm">Bytes sent </dt>
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<dd>Displays the number of bytes sent by the enabled function or associated
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server identified at the top of the column. </dd>
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</dl>
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<dl><dt class="dlterm">Non-cache Processing (seconds) </dt>
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<dd>Displays the number of seconds of non-cached processing activity completed
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by the enabled function or associated server identified at the top of the
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column.</dd>
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</dl>
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<dl><dt class="dlterm">Cache Processing (seconds) </dt>
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<dd>Displays the number of seconds of cached processing activity completed
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by the enabled function or associated server identified at the top of the
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column.</dd>
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</dl>
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</div>
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<div class="section"><h4 class="sectiontitle">Averages</h4><p>The server averages information displays
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the average length of activity, in seconds, completed by the enabled function
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or associated server identified at the top of the column. Each column heading
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identifies what enabled function or associated server is being surveyed for
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statistical information. Each row identifies what statistical information
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is being retrieved. Averages are not affected by end user response times.
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Factors such as internet and intranet traffic, firewalls, and connection speeds
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are not determined. Statistical information displayed for each column includes: </p>
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<dl><dt class="dlterm">Total (seconds) </dt>
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<dd>Displays the total time of activity completed by the enabled function
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or associated server identified at the top of the column. </dd>
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</dl>
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<dl><dt class="dlterm">Non-cached (seconds) </dt>
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<dd>Displays the average length of time of non-cached activity completed by
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the enabled function or associated server identified at the top of the column. </dd>
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</dl>
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<dl><dt class="dlterm">Cached (seconds) </dt>
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<dd>Displays the average length of time of cached activity completed by the
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enabled function or associated server identified at the top of the column. </dd>
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</dl>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaieconcepts.htm" title="This topic provides concepts of functions on HTTP Server and IBM Web Administration for i5/OS interface.">Concepts of functions of HTTP Server</a></div>
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</div>
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</div>
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</body>
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</html>
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