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<meta name="DC.Title" content="Control levels of system activity" />
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<meta name="abstract" content="You can control how much activity is on the system by controlling how many jobs can be active at the same time in a subsystem or by controlling the use of the processing unit by jobs that have already been started." />
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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">Control levels of system activity</h1>
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<div><p>You can control how much activity is on the system by controlling
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how many jobs can be active at the same time in a subsystem or by controlling
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the use of the processing unit by jobs that have already been started.</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption>Table 1. Ways to control system activity levels</caption><thead align="left"><tr valign="bottom"><th valign="bottom" width="10.483870967741936%" id="d0e22">What can I control?</th>
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<th valign="bottom" width="15.053763440860216%" id="d0e24">What can I use to control?</th>
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<th valign="bottom" width="35.215053763440864%" id="d0e26">Character-based interface method</th>
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<th valign="bottom" width="39.247311827956985%" id="d0e28">iSeries™ Navigator interface method</th>
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</tr>
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</thead>
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<tbody><tr><td rowspan="6" valign="top" width="10.483870967741936%" headers="d0e22 ">Number of active jobs</td>
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<td valign="top" width="15.053763440860216%" headers="d0e24 ">Subsystem Description</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">Command: <span class="cmdname">CHGSBSD </span><span class="parmname">MAXJOBS</span><p>Use
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this parameter to specify how many jobs can be active at the same time in
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a subsystem.</p>
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<p>For an active subsystem, the sum of all of the jobs that
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are active at the same time that are started through work entries in the subsystem
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cannot exceed the MAXJOBS parameter value. </p>
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<p>This excludes autostart
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jobs, which might temporarily cause the limit to be exceeded when the subsystem
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is started.</p>
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</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 ">Use the Run Command window.<p><span class="menucascade"><span class="uicontrol">Right-click
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the endpoint system</span> > <span class="uicontrol">Run Command</span></span></p>
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<p>Type
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the command <span class="cmdname">CHGSBSD</span> and then click <span class="uicontrol">Prompt.</span></p>
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</td>
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</tr>
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<tr><td valign="top" width="15.053763440860216%" headers="d0e24 ">Job Queue Entry</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">Command: <span class="cmdname">CHGJOBQE </span><span class="parmname">MAXACT</span><p>Use
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this parameter to specify how many batch jobs from a job queue can be active
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at the same time in the subsystem.</p>
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<p>A MAXACT of 1 for a job queue forces
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jobs to be selected serially by job priority from a job queue.</p>
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The MAXPTYn
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parameter is used to specify how many jobs can be active for a specified job
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priority.</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 ">Use the Run Command window.<p><span class="menucascade"><span class="uicontrol">Right-click
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the endpoint system</span> > <span class="uicontrol">Run Command</span></span></p>
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<p>Type
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the command <span class="cmdname">CHGJOBQE</span> and then click <span class="uicontrol">Prompt.</span></p>
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</td>
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</tr>
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<tr><td valign="top" width="15.053763440860216%" headers="d0e24 ">Workstation Entry</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">Command: <span class="cmdname">CHGWSE </span><span class="parmname">MAXACT</span><p>Use
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this parameter if the WRKSTNTYPE parameter is specified. This parameter specifies
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how many interactive jobs can be active at the same time in the subsystem
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for that entry.</p>
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</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 ">Use the Run Command window.<p><span class="menucascade"><span class="uicontrol">Right-click
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the endpoint system</span> > <span class="uicontrol">Run Command</span></span></p>
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<p>Type
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the command <span class="cmdname">CHGWSE</span> and then click <span class="uicontrol">Prompt.</span></p>
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</td>
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</tr>
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<tr><td valign="top" width="15.053763440860216%" headers="d0e24 ">Communications Entry</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">Command: <span class="cmdname">CHGCMNE </span><span class="parmname">MAXACT</span><p>Use
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this parameter to specify how many communications batch jobs can be active
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at the same time for that entry.</p>
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</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 ">Use the Run Command window.<p><span class="menucascade"><span class="uicontrol">Right-click
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the endpoint system</span> > <span class="uicontrol">Run Command</span></span></p>
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<p>Type
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the command <span class="cmdname">CHGCMNE</span> and then click <span class="uicontrol">Prompt.</span></p>
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</td>
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</tr>
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<tr><td valign="top" width="15.053763440860216%" headers="d0e24 ">Routing Entry</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">Command: <span class="cmdname">CHGRTGE </span><span class="parmname">MAXACT</span><p>Use
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this command to specify how many jobs can be active at the same time using
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a given routing entry.</p>
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</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 ">Use the Run Command window.<p><span class="menucascade"><span class="uicontrol">Right-click
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the endpoint system</span> > <span class="uicontrol">Run Command</span></span></p>
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<p>Type
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the command <span class="cmdname">CHGRTGE</span> and then click <span class="uicontrol">Prompt.</span></p>
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</td>
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</tr>
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<tr><td valign="top" width="15.053763440860216%" headers="d0e24 ">Prestart job entry</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">Command: <span class="cmdname">CHGPJE </span><span class="parmname">MAXJOBS</span><p>Use
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this command to specify how many prestart jobs can be active at the same time
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for that entry.</p>
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</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 ">Use the Run Command window.<p><span class="menucascade"><span class="uicontrol">Right-click
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the endpoint system</span> > <span class="uicontrol">Run Command</span></span></p>
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<p>Type
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the command <span class="cmdname">CHGPJE</span> and then click <span class="uicontrol">Prompt.</span></p>
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</td>
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</tr>
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<tr><td valign="top" width="10.483870967741936%" headers="d0e22 ">Number of active jobs (continued)</td>
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<td valign="top" width="15.053763440860216%" headers="d0e24 ">System</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">The Maximum eligible threads (QMAXACTLVL) system value
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is used to specify how many threads can share main storage and processor resources
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at the same time. All active jobs (including system jobs) in all storage pools
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are controlled by QMAXACTLVL.</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 "><p><span class="menucascade"><span class="uicontrol">My Connections</span> > <span class="uicontrol">server</span> > <span class="uicontrol">Configuration and Service</span> > <span class="uicontrol">System Values</span> > <span class="uicontrol">Performance category</span> > <span class="uicontrol">Memory Pools tab</span> > <span class="uicontrol">Maximum eligible threads</span></span></p>
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</td>
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</tr>
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<tr><td rowspan="3" valign="top" width="10.483870967741936%" headers="d0e22 ">Use of processing unit and main storage</td>
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<td valign="top" width="15.053763440860216%" headers="d0e24 ">Base storage pools</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">The Base memory pool maximum eligible threads (QBASACTLVL)
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system value is used to specify how many threads can share the Base storage
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pool at the same time and to limit main storage contention.</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 "><p><span class="menucascade"><span class="uicontrol">My Connections</span> > <span class="uicontrol">server</span> > <span class="uicontrol">Configuration and Service</span> > <span class="uicontrol">System Values</span> > <span class="uicontrol">Performance category</span> > <span class="uicontrol">Memory Pools tab</span> > <span class="uicontrol">Base Memory pool: Maximum
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eligible threads</span></span></p>
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</td>
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</tr>
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<tr><td valign="top" width="15.053763440860216%" headers="d0e24 ">Shared pools</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">Command: <span class="cmdname">WRKSHRPOOL</span><p>Use this command
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to specify the activity level for shared pools</p>
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</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 "><p><span class="menucascade"><span class="uicontrol">My Connections</span> > <span class="uicontrol">server</span> > <span class="uicontrol">Work Management</span> > <span class="uicontrol">Memory
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Pools</span> > <span class="uicontrol">Shared Pools</span> > <span class="uicontrol">right-click
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a shared pool</span> > <span class="uicontrol">Properties</span> > <span class="uicontrol">Configuration
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tab</span></span> and change the <span class="uicontrol">Maximum eligible threads</span> field</p>
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</td>
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</tr>
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<tr><td valign="top" width="15.053763440860216%" headers="d0e24 ">Private storage pools</td>
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<td valign="top" width="35.215053763440864%" headers="d0e26 ">Command: <span class="cmdname">CHGSBSD </span><span class="parmname">POOLS</span><p>Use
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this command to specify the activity level for user-defined main storage pools.</p>
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</td>
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<td valign="top" width="39.247311827956985%" headers="d0e28 ">Use the Run Command window.<p><span class="menucascade"><span class="uicontrol">Right-click
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the endpoint system</span> > <span class="uicontrol">Run Command</span></span></p>
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<p>Type
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the command <span class="cmdname">CHGSBSD</span> and then click <span class="uicontrol">Prompt.</span></p>
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</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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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rzaksactvitiyctrlexmpl.htm">Examples: activity control</a></strong><br />
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These examples show the relationship of some of the activity controls. Assume the system activity level is 100 and the jobs are single-threaded.</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="rzakssystemstatus.htm" title="Monitoring system activity is one of the many important tasks in the day of an administrator. Monitoring the flow of work through the system is only a piece of the information that should be monitored on a daily basis. You can accomplish this in a variety of ways, such as using iSeries Navigator and iSeries Navigator Management Central.">Monitor system activity</a></div>
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