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memory (Munin :: localdomain :: localhost.localdomain :: memory)
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memory
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<h2>Problems</h2>
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<li><a href="../../problems.html#critical">Critical</a> (1)</li>
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<h2>Categories</h2>
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<h2>Service graphs</h2>
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<td><a href="../../static/dynazoom.html?cgiurl_graph=/munin-cgi/munin-cgi-graph&plugin_name=localdomain/localhost.localdomain/memory&size_x=800&size_y=400&start_epoch=1762422910&stop_epoch=1762530910">
<img src="../../localdomain/localhost.localdomain/memory-day.png"
alt="daily graph"
class="i"
width="497"
height="431"/>
</a></td>
<td><a href="../../static/dynazoom.html?cgiurl_graph=/munin-cgi/munin-cgi-graph&plugin_name=localdomain/localhost.localdomain/memory&size_x=800&size_y=400&start_epoch=1761839710&stop_epoch=1762530910">
<img src="../../localdomain/localhost.localdomain/memory-week.png"
alt="weekly graph"
class="i"
width="497"
height="431"/>
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</tr>
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<img src="../../localdomain/localhost.localdomain/memory-month.png"
alt="monthly graph"
class="i"
width="497"
height="431"/>
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<td><a href="../../static/dynazoom.html?cgiurl_graph=/munin-cgi/munin-cgi-graph&plugin_name=localdomain/localhost.localdomain/memory&size_x=800&size_y=400&start_epoch=1727970910&stop_epoch=1762530910">
<img src="../../localdomain/localhost.localdomain/memory-year.png"
alt="yearly graph"
class="i"
width="497"
height="431"/>
</a></td>
</tr>
<!-- .sum graphs. One of the least used features of munin? -->
</table>
<h2>Graph Information</h2>
<!-- Do we actually allow mutiple graph_info, or is this just to access the nested data? -->
<p class="graph_info">This graph shows what the machine uses memory for.</p>
<table id="legend">
<tr>
<th class="field">Field</th>
<th class="internal"><span title="For use in munin.conf">Internal name</span></th>
<th class="type"><a href="..%2F../static/definitions.html#data_types">Type</a></th>
<th class="warn">Warn</th>
<th class="crit">Crit</th>
<th class="info">Info</th>
</tr>
<tr class="oddrow">
<td class="field">apps</td>
<td class="internal"><span title="For use in munin.conf">apps</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Memory used by user-space applications.</td>
</tr>
<tr class="evenrow">
<td class="field">page_tables</td>
<td class="internal"><span title="For use in munin.conf">page_tables</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Memory used to map between virtual and physical memory addresses.</td>
</tr>
<tr class="oddrow">
<td class="field">swap_cache</td>
<td class="internal"><span title="For use in munin.conf">swap_cache</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>A piece of memory that keeps track of pages that have been fetched from swap but not yet been modified.</td>
</tr>
<tr class="evenrow">
<td class="field">slab_cache</td>
<td class="internal"><span title="For use in munin.conf">slab</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Memory used by the kernel (major users are caches like inode, dentry, etc).</td>
</tr>
<tr class="oddrow">
<td class="field">shmem</td>
<td class="internal"><span title="For use in munin.conf">shmem</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Shared Memory (SYSV SHM segments, tmpfs).</td>
</tr>
<tr class="evenrow">
<td class="field">cache</td>
<td class="internal"><span title="For use in munin.conf">cached</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Parked file data (file content) cache.</td>
</tr>
<tr class="oddrow">
<td class="field">buffers</td>
<td class="internal"><span title="For use in munin.conf">buffers</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Block device (e.g. harddisk) cache. Also where "dirty" blocks are stored until written.</td>
</tr>
<tr class="evenrow">
<td class="field">unused</td>
<td class="internal"><span title="For use in munin.conf">free</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Wasted memory. Memory that is not used for anything at all.</td>
</tr>
<tr class="oddrow">
<td class="field">swap</td>
<td class="internal"><span title="For use in munin.conf">swap</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Swap space used.</td>
</tr>
<tr class="evenrow">
<td class="field">vmalloc_used</td>
<td class="internal"><span title="For use in munin.conf">vmalloc_used</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>'VMalloc' (kernel) memory used</td>
</tr>
<tr class="oddrow">
<td class="field">committed</td>
<td class="internal"><span title="For use in munin.conf">committed</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>The amount of memory allocated to programs. Overcommitting is normal, but may indicate memory leaks.</td>
</tr>
<tr class="evenrow">
<td class="field">mapped</td>
<td class="internal"><span title="For use in munin.conf">mapped</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>All mmap()ed pages.</td>
</tr>
<tr class="oddrow">
<td class="field">active</td>
<td class="internal"><span title="For use in munin.conf">active</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Memory recently used. Not reclaimed unless absolutely necessary.</td>
</tr>
<tr class="evenrow lastrow">
<td class="field">inactive</td>
<td class="internal"><span title="For use in munin.conf">inactive</span></td>
<td class="type">gauge</td>
<td class="warn"> </td>
<td class="info"> </td>
<td>Memory not currently used.</td>
</tr>
</table>
<!-- services -->
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<p class="tagline">This page was generated by <a href="http://www.munin-monitoring.org/">Munin</a> version 2.0.57 at 2025-11-07 16:55:09+0100 (CET).</p>
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