117 lines
6.1 KiB
HTML
117 lines
6.1 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 name="security" content="public" />
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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="Manage Simple Mail Transfer Protocol server performance" />
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<meta name="abstract" content="These are tips for managing a busy Simple Mail Transfer Protocol (SMTP) server that uses multiprocessing." />
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<meta name="description" content="These are tips for managing a busy Simple Mail Transfer Protocol (SMTP) server that uses multiprocessing." />
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<meta name="DC.Relation" scheme="URI" content="rzairadmnmail.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzairchangevalues.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzairchangeclient.htm" />
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<meta name="DC.Relation" scheme="URI" content="selectnewsubsystem.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzairpsrt" />
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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>Manage Simple Mail Transfer Protocol server performance</title>
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</head>
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<body id="rzairpsrt"><a name="rzairpsrt"><!-- --></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">Manage Simple Mail Transfer Protocol server performance</h1>
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<div><p>These are tips for managing a busy Simple Mail Transfer Protocol
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(SMTP) server that uses multiprocessing.</p>
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<p>Your SMTP server might be busy because it uses all its
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capacity for adding and ending prestart jobs for each e-mail request.</p>
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<p>If you find that the number of prestart jobs is affecting iSeries™ performance,
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you can set the threshold lower. If you want more jobs, you can set the number
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of prestart jobs higher.</p>
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<p>With prestart jobs, every e-mail request runs as its own job. This method
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allows each job to focus solely on its client or server program's needs and
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requests. Each job can make longer time-out calls to enable the posting of
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host names for the purpose of not receiving unsolicited bulk e-mail.</p>
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<p>To manage a busy SMTP server, you can change the following values:</p>
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<ul><li>The number of jobs to start on initialization</li>
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<li>A threshold number for jobs</li>
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<li>The number of jobs to add when the server reaches the threshold</li>
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<li>A maximum for the number of running jobs to allow</li>
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<li>Selecting a subsystem for jobs</li>
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</ul>
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<p>To manage a busy server, you need to change values on the SMTP server and
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the SMTP client.</p>
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<p>The SMTP server works with the daemon and prestart jobs: QTSMTPSRVD and
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QTMSMTPSRVP. The SMTP client works with the daemon and prestart jobs: QTSMTPCLTD
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and QTSMTPCLTP.</p>
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<p>To change the values on the SMTP server, follow these steps:</p>
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<ol><li>In the iSeries character-based
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interface, type <kbd class="userinput">CHGPJE </kbd>(the Change Job Entries command).
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The Change Job Entries display appears.</li>
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<li>Enter the following values at the prompt and press Enter:</li>
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</ol>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr valign="bottom"><th valign="bottom" id="d0e60">Prompt</th>
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<th valign="bottom" id="d0e62">Value</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e60 ">Subsystem</td>
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<td valign="top" headers="d0e62 ">QSYSWRK</td>
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</tr>
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<tr><td valign="top" headers="d0e60 ">Library</td>
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<td valign="top" headers="d0e62 ">QSYS</td>
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</tr>
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<tr><td valign="top" headers="d0e60 ">Program</td>
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<td valign="top" headers="d0e62 ">QTMSSRCP</td>
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</tr>
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<tr><td valign="top" headers="d0e60 ">Library</td>
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<td valign="top" headers="d0e62 ">QTCP</td>
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</tr>
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<tr><td valign="top" headers="d0e60 ">Start jobs</td>
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<td valign="top" headers="d0e62 ">*SAME</td>
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</tr>
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<tr><td valign="top" headers="d0e60 ">Initial number of jobs</td>
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<td valign="top" headers="d0e62 ">4</td>
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</tr>
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<tr><td valign="top" headers="d0e60 ">Threshold</td>
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<td valign="top" headers="d0e62 ">2</td>
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</tr>
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<tr><td valign="top" headers="d0e60 ">Additional number of jobs</td>
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<td valign="top" headers="d0e62 ">2</td>
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</tr>
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<tr><td valign="top" headers="d0e60 ">Maximum number of jobs</td>
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<td valign="top" headers="d0e62 ">20</td>
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</tr>
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</tbody>
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</table>
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</div>
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<p>These values guarantee that the server will start four prestart jobs, start
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two additional jobs when the available jobs fall below two, and allow a maximum
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of twenty prestart jobs.</p>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzairchangevalues.htm">Change values for the Simple Mail Transfer Protocol server</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="rzairchangeclient.htm">Change values for the Simple Mail Transfer Protocol client</a></strong><br />
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</li>
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<li class="ulchildlink"><strong><a href="selectnewsubsystem.htm">Select new subsystem for Simple Mail Transfer Protocol server jobs</a></strong><br />
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</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzairadmnmail.htm" title="As an experienced user or administrator, you can manage e-mail servers, users, and messages to ensure distribution of e-mail in your network.">Manage e-mail</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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