141 lines
9.2 KiB
HTML
141 lines
9.2 KiB
HTML
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<meta name="DC.Title" content="Dynamically move memory" />
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<meta name="abstract" content="Memory in each logical partition operates within its assigned minimum and maximum values." />
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<meta name="description" content="Memory in each logical partition operates within its assigned minimum and maximum values." />
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<meta name="DC.Relation" scheme="URI" content="rzaitmemorymove.htm" />
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<title>Dynamically move memory</title>
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</head>
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<body id="rzaitmovememory"><a name="rzaitmovememory"><!-- --></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">Dynamically move memory</h1>
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<div><p>Memory in each logical partition operates within its assigned minimum
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and maximum values.</p>
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<div class="section"><p>You can dynamically move memory between logical partitions without
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needing to restart the affected partitions as long as your request for memory
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movement is within the range of the minimum and maximum values specified during
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partition creation.</p>
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<p>When you request to dynamically move memory between
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partitions, you should note that this memory is removed and added to the base
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memory pool of each of the partitions (*BASE pool). Private memory pools or
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shared memory pools are not affected. If the move request exceeds the amount
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of memory available in the base pool, the system will only free up excess
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memory pages after keeping the minimum amount of memory required in the base
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pool. This value is determined by the base storage minimum size (QBASPOOL)
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system value. To prevent any data loss during memory movement, the system
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first writes any data from memory pages to the disks before making the memory
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pages available to another partition. Depending on the amount of memory you
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have requested to move, this may take some time.</p>
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<p>Each partition will
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report its runtime minimum memory size. This value is an estimate of how much
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memory in the partition is locked into that partition and cannot be moved
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dynamically. Reducing the number of processes or threads within a partition
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or changing the *BASE pool will affect the runtime minimum.</p>
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<p>The full
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amount of memory that you assign to a logical partition may not be available
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for the partition's use. Static memory overhead required to support the assigned
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maximum memory will affect the reserved or hidden memory amount. This static
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memory overhead will also influence the minimum memory size of a partition.</p>
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<p>The
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minimum memory size assigned to a partition can be changed with only a restart
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of the partition. However, changes to the maximum memory size require a restart
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of the entire system and may require a larger minimum memory value.</p>
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<p>To
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move memory from one logical partition to another using My Connections, follow
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these steps:</p>
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</div>
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<ol><li><span>In iSeries™ Navigator,
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expand <span class="uicontrol">My Connections</span> or your active environment.</span></li>
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<li><span>Select the primary partition of the system.</span></li>
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<li><span>Expand <span class="uicontrol">Configuration and Service</span> and select <span class="uicontrol">Logical
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Partitions</span>.</span></li>
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<li><span>Right-click the <span class="uicontrol">Logical Partition</span> and select <span class="uicontrol">Configure
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Partitions</span>. You are now working in the Configure Logical Partitions
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window.</span></li>
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<li><span>Select the partition from which you would like to move memory.</span></li>
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<li><span>Right-click <span class="uicontrol">Memory</span> and select <span class="uicontrol">Move</span>.</span></li>
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<li><span>Specify the amount of memory to move in <span class="uicontrol">Memory to move</span>.
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This value must be less than the current amount of memory available to the
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logical partition. The <span class="uicontrol">Memory after Move</span> values for
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both the source and receiving partitions must fall within the minimum/maximum
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ranges specified for memory.</span></li>
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<li><span>Select the partition to receive the memory in <span class="uicontrol">To logical
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partition</span>.</span></li>
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<li><span>Click <span class="uicontrol">OK</span> to move the memory you specified.</span></li>
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</ol>
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<div class="section"><p>To move memory from one logical partition to another using the
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service tools window, follow these steps:</p>
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<ol><li>In iSeries Navigator,
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select <span class="uicontrol">My Connections</span> or your active environment.</li>
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<li>Select <span class="uicontrol">Open iSeries Navigator service tools window</span> in
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the Taskpad window. If the Taskpad window is not displayed, select <span class="uicontrol">View</span> and
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select <span class="uicontrol">Taskpad</span>.</li>
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<li>Enter the <span class="uicontrol">IP address</span> of the service tool network
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interface to which you want to connect. Click <span class="uicontrol">OK</span>.</li>
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<li>You will be prompted for your <span class="uicontrol">Service Tools User ID and password</span>.</li>
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<li>Expand the system name select <span class="uicontrol">Logical Partitions</span>.</li>
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<li>Right-click the logical partition and select <span class="uicontrol">Configure Partitions</span>.
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You are now working in the Configure Logical Partitions window.</li>
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<li>Select the partition from which you would like to move memory.</li>
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<li>Right-click <span class="uicontrol">Memory</span> and select <span class="uicontrol">Move</span>.</li>
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<li>Specify the amount of memory to move in <span class="uicontrol">Memory to move</span>.
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This value must be less than the current amount of memory available to the
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logical partition. The <span class="uicontrol">Memory after Move</span> values for
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both the source and receiving partitions must fall within the minimum/maximum
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ranges specified for memory.</li>
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<li>Select the partition to receive the memory in <span class="uicontrol">To logical partition</span>.</li>
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<li>Click <span class="uicontrol">OK</span> to move the memory you specified.</li>
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</ol>
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<p>To move memory from one logical partition to another using Management
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Central, follow these steps:</p>
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<ol><li>In iSeries Navigator,
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expand <span class="uicontrol">Management Central</span>.</li>
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<li>Expand <span class="uicontrol">Systems with Partitions</span>.</li>
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<li>Select the physical system that has the logical partition with which you
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want to work.</li>
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<li>Right-click the logical partition and select <span class="uicontrol">Configure Partitions</span>.
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You are now working in the Configure Logical Partitions window.</li>
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<li>Select the partition from which you would like to move memory.</li>
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<li>Right-click <span class="uicontrol">Memory</span> and select <span class="uicontrol">Move</span>.</li>
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<li>Specify the amount of memory to move in <span class="uicontrol">Memory to move</span>.
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This value must be less than the current amount of memory available to the
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logical partition. The <span class="uicontrol">Memory after Move</span> values for
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both the source and receiving partitions must fall within the minimum/maximum
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ranges specified for memory.</li>
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<li>Select the partition to receive the memory in <span class="uicontrol">To logical partition</span>.</li>
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<li>Click <span class="uicontrol">OK</span> to move the memory you specified.</li>
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</ol>
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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="rzaitdynamicmoves.htm" title="Understand how to move processors, I/O processors, memory, and interactive performance between partitions without requiring a partition or system restart.">Dynamically move logical partition resources</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="rzaitmemorymove.htm" title="Primary partitions need a minimum of 256 MB of memory.">Determine the amount of memory to move</a></div>
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<div><a href="rzaitwronofflpar.htm" title="Understand how to safely restart and power down a system with logical partitions.">Restart and power down a system with logical partitions</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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