73 lines
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73 lines
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HTML
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<title>Create a private memory pool</title>
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<body id="rzakscreatemempool"><a name="rzakscreatemempool"><!-- --></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">Create a private memory pool</h1>
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<div><p>Private memory pools (also known as user-defined memory pools)
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can be used by IBM-supplied subsystems or by user-defined subsystems. You
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can define up to a maximum of 10 memory pool definitions for a subsystem.
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You create a private memory pool in the subsystem description.</p>
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<div class="p">To create a private memory pool, use the character-based interface.</div>
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<div class="section"><strong>Command</strong>: Create Subsystem Description (<span class="cmdname">CRTSBSD</span>) <span class="parmname">POOLS</span> parameter.<p><strong>Command</strong>:
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Change Subsystem Description (<span class="cmdname">CHGSBSD</span>) <span class="parmname">POOLS</span> parameter.</p>
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</div>
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<div class="section"><div class="note"><span class="notetitle">Note:</span> Although each subsystem description can have as many as 10
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user-defined memory pools, there is an operation limitation of no more than
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64 memory pools that can be active at any time. (This includes the Base memory
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pool and the Machine memory pool.) If the maximum allocation limit is reached
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before all of the memory pools for a subsystem are allocated, the Base pool
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is used for any routing steps that still require a memory pool.</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="rzaksmanagemp1.htm" title="Making sure that jobs get enough memory to complete efficiently is important. If too much memory is given to subsystem A and not enough to subsystem B, jobs in subsystem B might begin to run poorly. The following information describes the various tasks that are involved in managing memory pools.">Manage memory pools</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzakstypesmempools.htm" title="On the iSeries server, all main storage can be divided into logical allocations called memory pools. All memory pools in a system are either private or shared. There are private memory pools, shared memory pools, and special shared memory pools. As many as 64 memory pools, in any combination of private and shared pools, can be active at the same time.">Types of memory pools</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../rzahx/rzahxmngparent.htm">Manage iSeries performance</a></div>
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<div><a href="../rzahx/rzahxtune.htm">Basic performance tuning</a></div>
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<div><a href="../rzahx/rzahxapsparent.htm">Applications for performance management</a></div>
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<div><a href="../experience/work3abstract.htm">Experience report: The Performance Adjuster</a></div>
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<div><a href="../rzakz/rzakzqmchpool.htm">Performance system values: Machine memory pool size</a></div>
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<div><a href="../rzakz/rzakzqbaspool.htm">Performance system values: Base memory pool minimum size</a></div>
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<div><a href="../rzakz/rzakzqbasactlvl.htm">Performance system values: Base memory pool maximum eligible threads</a></div>
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</div>
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</div>
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