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<h1 class="topictitle1">Performance system values: Base memory pool minimum size</h1>
<div><p>Specifies the minimum base memory pool. (QBASPOOL)</p>
<p><span class="uicontrol">Base memory pool minimum size</span>, also known as <span class="uicontrol">QBASPOOL</span>,
is a member of the performance category of i5/OS™ system values. You can use this system
value to specify the minimum size for the base memory pool. To learn more,
keep reading.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr><th colspan="2" valign="top" class="firstcol" id="d0e31">Quick reference </th>
</tr>
</thead>
<tbody><tr><th valign="top" class="firstcol" id="d0e35" headers="d0e31 ">Location</th>
<td valign="top" headers="d0e35 d0e31 ">In iSeries™ Navigator,
select your system, <span class="menucascade"><span class="uicontrol"></span> &gt; <span class="uicontrol">Configuration
and Service</span> &gt; <span class="uicontrol">System Values</span> &gt; <span class="uicontrol">Performance</span> &gt; <span class="uicontrol">Memory Pools</span></span></td>
</tr>
<tr><th valign="top" class="firstcol" id="d0e53" headers="d0e31 ">Special authority</th>
<td valign="top" headers="d0e53 d0e31 ">None</td>
</tr>
<tr><th valign="top" class="firstcol" id="d0e58" headers="d0e31 ">Default value</th>
<td valign="top" headers="d0e58 d0e31 ">5% of the main storage with a minimum value of 2000 KB</td>
</tr>
<tr><th valign="top" class="firstcol" id="d0e63" headers="d0e31 ">Changes take effect</th>
<td valign="top" headers="d0e63 d0e31 ">Immediately</td>
</tr>
<tr><th valign="top" class="firstcol" id="d0e68" headers="d0e31 ">Lockable</th>
<td valign="top" headers="d0e68 d0e31 ">No</td>
</tr>
</tbody>
</table>
</div>
<div class="section"><h4 class="sectiontitle">What can I do with this system value?</h4><p>You may specify
the minimum size of the base memory pool in megabytes (MB). A memory pool
is a logical division of memory (storage) that is reserved for processing
a job or group of jobs. The base memory pool contains all memory not allocated
by other pools. This pool is specified in the subsystem description as *BASE.</p>
<p>In
some circumstances, a machine function may be using storage allocated to the
base pool. If this is so, and if the change to the system value would reduce
the allocation to less than 256 KB (kilobytes) plus the amount needed by the
machine, the system value is changed immediately. However, the actual base
pool size will not be reduced below 256 KB plus the amount needed by the machine
until the storage in use is released by the machine.</p>
</div>
<div class="section"><h4 class="sectiontitle">Where can I get more information about this system value?</h4><p>To
learn more, go to the performance system values overview topic. If you are
looking for a specific system value or category of system values, try using
the i5/OS system
value finder.</p>
</div>
</div>
<div><div class="relconcepts"><strong>Related concepts</strong><br />
<div><a href="rzakzperformanceoverview.htm" title="Use i5/OS performance system values to view and change priority, performance adjustments, and processing values for the system.">System values: Performance overview</a></div>
</div>
<div class="relinfo"><strong>Related information</strong><br />
<div><a href="rzakzfinder.htm">System value finder</a></div>
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