695 lines
24 KiB
HTML
695 lines
24 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<script src="__javascript__/OOMAnalyser.js" defer="defer"></script>
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<meta charset="UTF-8">
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<title>OOM Analyser</title>
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<style>
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/* Use BEM naming convention */
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.text--append-suffix-kbytes {
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text-align: right;
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}
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.text--append-suffix-kbytes::after {
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content: " kBytes";
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}
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.text--append-suffix-pages {
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text-align: right;
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}
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.text--append-suffix-pages::after {
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content: " pages";
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}
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.text--align-right {
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text-align: right;
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}
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.text__superscript {
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vertical-align: super;
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font-size: 0.83em;
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}
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.text--default-hide {
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/* empty just used to hide elements in the default view */
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}
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.text--default-show {
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/* empty just used to show elements in the default view */
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}
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svg {
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display: block;
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max-height: 200px;
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}
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table {
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border-collapse: collapse;
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padding: 10px;
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table-layout: fixed;
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text-align: left;
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width: 100%;
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}
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th {
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font-weight: bold;
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font-size: large;
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padding: 5px;
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}
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th, td {
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border: 1px solid black;
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word-wrap: break-word;
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}
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.a--small {
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font-size: small;
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font-weight: unset;
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padding: unset;
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}
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.a__footnote {
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vertical-align: super;
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font-size: 0.83em;
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}
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/* Zebra-Layout */
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tr:nth-child(odd) td:nth-child(2), tr:nth-child(odd) td:nth-child(3) {
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background-color: #f2f2f2;
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}
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.js-notify_box__msg--warning {
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color: #9F6000;
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background-color: #FEEFB3;
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}
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.js-notify_box__msg--error {
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color: #D8000C;
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background-color: #FFD2D2;
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}
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.js-text--display-none {
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display: none;
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}
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.license__text {
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font-size: small;
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}
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.notify_box {
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width: 100%;
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}
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.terminal {
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font-family: monospace;
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overflow: auto;
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}
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</style>
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<script>
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function goBack() {
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window.history.back();
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}
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</script>
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</head>
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<body>
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<h1>Analyse and visualise Linux OOM output</h1>
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<p>
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This web page analyses Linux Out Of Memory (OOM) messages and shows these
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information in a human friendly presentation.
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</p>
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<p>
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Your input will be analysed locally - in your browser - by an integrated
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JavaScript script without transferring your data to foreign servers.
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</p>
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<p>
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<div class="terminal notify_box text--default-hide js-text--display-none" id="notify_box"></div>
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<div class="text--default-show" id="input">
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<h2>Step 1 - Enter your OOM message</h2>
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<textarea autocomplete="off" cols="100" id="textarea_oom" onfocusin="OOMAnalyser.OOMDisplayInstance.empty_textarea_oom()" rows="20" title="OOM input field">Add your OOMhere</textarea>
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<br/>
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<button onclick="OOMAnalyser.OOMDisplayInstance.analyse_and_show()" title="Analyse the OOM from the input area and show it">Analyse</button>
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<button onclick="OOMAnalyser.OOMDisplayInstance.reset_form()" title="Clean the input area">Reset</button>
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<button onclick="OOMAnalyser.OOMDisplayInstance.copy_example_to_form()" title="Copy an example OOM into the input area">Insert example</button>
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</div>
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<div class="text--default-hide js-text--display-none" id="analysis">
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<h2>Step 2 - Results</h2>
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<p>
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Go back to
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<a href="javascript:void(0);" onclick="OOMAnalyser.OOMDisplayInstance.reset_form()" title="Run a new analysis">"Step 1 - Enter your OOM message"</a>
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to run a new analysis.
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</p>
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<p>
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The result of the analysis is displayed in three columns. The first column is used to name the property
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including the original OOM identifier in brackets. The extracted information is displayed in the second column.
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The last column contains further details and additional information.
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</p>
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<table>
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<!--
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<thead>
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<tr>
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<th scope="col"></th>
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<th scope="col">Entry</th>
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<th scope="col">Description</th>
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</tr>
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</thead>
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-->
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<tbody>
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<!-- Trigger process -->
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<tr>
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<th scope="row" colspan="3">Tigger Process</th>
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</tr>
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<tr>
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<td></td>
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<td class="text--align-right"><span id="trigger_proc_name"></span> (PID <span id="trigger_proc_pid"></span>)</td>
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<td>This process requests memory and is triggering thereby the OOM situation.</td>
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</tr>
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<tr>
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<td>Memory allocation flags<br>(gfp_mask)</td>
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<td id="trigger_proc_gfp_mask" class="text--align-right"></td>
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<td>These flags are used to control the kernel internal memory allocation<br>
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GFP stands for <code>__get_free_pages()</code>.</td>
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</tr>
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<tr>
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<td>Node mask to show on which CPU Cores this process can run<br>(nodemask)</td>
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<td id="trigger_proc_nodemask" class="text--align-right"></td>
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<td>Bit mask indicating the cores on which the process can run.</td>
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</tr>
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<tr>
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<td>Requested memory<br>(order)</td>
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<td class="text--align-right">
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<span id="trigger_proc_requested_memory"></span> (2<span id="trigger_proc_order" class="text__superscript"></span>) pages /
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<span class="text--append-suffix-kbytes" id="trigger_proc_requested_memory_kbytes"></span>
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</td>
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<td>The kernel specifies the requested number of pages as exponent of power of two.
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</tr>
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<tr>
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<td>Adjust oom-killer score<br>(oom_score_adj)</td>
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<td id="trigger_proc_oomscore" class="text--align-right"></td>
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<td>
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This value is added to the badness score before it's used to determine the process to be killed.
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</td>
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</tr>
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<!-- Killed Process -->
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<tr>
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<th scope="row" colspan="3">Killed Process</th>
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</tr>
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<tr>
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<td></td>
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<td class="text--align-right"><span id="killed_proc_name"></span> (PID <span id="killed_proc_pid"></span>)</td>
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<td>Process killed by Linux kernel to satisfy the memory request.</td>
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</tr>
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<tr>
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<td>OOM Score<br>(score)</td>
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<td id="killed_proc_score" class="text--align-right"></td>
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<td>Programs with the highest OOM score are terminated first.</td>
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</tr>
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<tr>
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<td>Virtual Memory <br> (total-vm) </td>
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<td id="killed_proc_vm_kb" class="text--append-suffix-kbytes"></td>
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<td>Virtual memory used by this process.</td>
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</tr>
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<tr>
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<td>Resident anonymous memory <br> (anon-rss) </td>
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<td id="killed_proc_anon_rss_kb" class="text--append-suffix-kbytes"></td>
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<td>Part of the virtual process memory mapped into RAM.</td>
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</tr>
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<tr>
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<td>Resident file mapping memory <br> (file-rss) </td>
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<td id="killed_proc_file_rss_kb" class="text--append-suffix-kbytes"></td>
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<td>Files which have been mapped into RAM (with
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<a href="http://man7.org/linux/man-pages/man2/mmap.2.html">mmap(2).</a>)
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</td>
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</tr>
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<tr>
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<td>Resident shared memory <br> (shmem-rss) </td>
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<td id="killed_proc_shmem_rss_kb" class="text--append-suffix-kbytes"></td>
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<td>This may include System V shared memory and shared anonymous memory.</td>
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</tr>
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<!-- Memory Usage Graphs -->
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<tr>
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<th scope="row" colspan="3">Memory Usage Graphs</th>
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</tr>
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<tr>
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<td style="font-weight: bold">RAM Summary</td>
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<td colspan="2"><div id="svg_ram"></div></td>
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</tr>
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<tr>
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<td style="font-weight: bold">Swap Summary</td>
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<td colspan="2"><div id="svg_swap"></div></td>
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</tr>
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<!-- Page Usage -->
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<tr>
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<td style="font-weight: bold">Memory Pages</td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td>RAM pages</td>
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<td id="ram_pages" class="text--append-suffix-pages"></td>
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<td>Total number of RAM pages
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</td>
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</tr>
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<tr>
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<td>HighMem/MovableOnly</td>
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<td id="highmem_pages" class="text--append-suffix-pages"></td>
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<td>Number of pages in the High Memory Area or marked movable for Contiguous Memory Allocator (CMA).
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<br>
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HighMem pages are also counted in the total page number.
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</td>
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</tr>
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<tr>
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<td>Reserved pages</td>
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<td id="reserved_pages" class="text--append-suffix-pages"></td>
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<td>Number of reserved pages
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</td>
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</tr>
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<tr>
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<td>CMA reserved pages</td>
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<td id="cma_pages" class="text--append-suffix-pages">0</td>
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<td>Pages reserved for Contiguous Memory Allocator (CMA)
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</td>
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</tr>
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<tr>
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<td>Pagetable Cache</td>
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<td id="pagetablecache_pages" class="text--append-suffix-pages">0</td>
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<td>Number of pages in pagetable cache
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</td>
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</tr>
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<tr>
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<td>Number of pages with hardware errors</td>
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<td id="hwpoisoned_pages" class="text--append-suffix-pages">0</td>
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<td>Pages with uncorrectable memory errors
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</td>
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</tr>
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<!-- Memory Usage Details -->
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<tr>
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<td style="font-weight: bold">Memory Usage Details</td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td>Active anonymous memory <br> (active_anon) </td>
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<td id="active_anon_pages" class="text--append-suffix-pages"></td>
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<td>Recently used anonymous memory.<br>
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These memory pages will usually not swapped out.
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</td>
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</tr>
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<tr>
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<td>Inactive anonymous memory <br> (inactive_anon)</td>
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<td id="inactive_anon_pages" class="text--append-suffix-pages"></td>
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<td>Least recently used anonymous memory.<br>
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These memory pages can be swapped out.
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</td>
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</tr>
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<tr>
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<td>Isolated anonymous memory <br> (isolated_anon)</td>
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<td id="isolated_anon_pages" class="text--append-suffix-pages"></td>
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<td>Memory isolation is used to separate memory between different virtual machines.</td>
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</tr>
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<tr>
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<td>Active Pagecache <br> (active_file)</td>
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<td id="active_file_pages" class="text--append-suffix-pages"></td>
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<td>Pagecache that has been used more recently and usually not reclaimed unless absolutely necessary.</td>
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</tr>
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<tr>
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<td>Inactive Pagecache <br> (inactive_file)</td>
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<td id="inactive_file_pages" class="text--append-suffix-pages"></td>
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<td>Pagecache which has been less recently used. It can be reclaimed without huge performance impact.</td>
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</tr>
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<tr>
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<td>Isolated Pagecache <br> (isolated_file)</td>
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<td id="isolated_file_pages" class="text--append-suffix-pages"></td>
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<td>Memory isolation is used to separate memory between different virtual machines.</td>
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</tr>
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<tr>
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<td>Unevictable Pages <br> (unevictable)</td>
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<td id="unevictable_pages" class="text--append-suffix-pages"></td>
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<td>Unevictable memory. It can't be swapped out because the pages are owned by ramfs or protected by
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<a href="http://man7.org/linux/man-pages/man3/mlock.5.html" target="_blank">mlock(3)</a> /
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<a href="http://man7.org/linux/man-pages/man2/shmctl.2.html" target="_blank">shmctl(SHM_LOCK)</a>.
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Unevictable pages are managed by kernels LRU framework.
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</td>
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</tr>
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<tr>
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<td>Dirty Pages <br> (dirty)</td>
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<td id="dirty_pages" class="text--append-suffix-pages"></td>
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<td>Memory which is waiting to get written back to the disk.
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>Writeback <br> (writeback)</td>
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<td id="writeback_pages" class="text--append-suffix-pages"></td>
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<td>
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Memory which is actively being written back to the disk.
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>Unstable <br> (unstable)</td>
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<td id="unstable_pages" class="text--append-suffix-pages"></td>
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<td>Not yet committed to stable storage.</td>
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</tr>
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<tr>
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<td>Slab Reclaimable <br> (slab_reclaimable)</td>
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<td id="slab_reclaimable_pages" class="text--append-suffix-pages"></td>
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<td>
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Slab is a in-kernel data structures cache. Part of Slab, that might be reclaimed, such as caches.
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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<br>
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Additional details are listed in
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<a href="http://man7.org/linux/man-pages/man5/slabinfo.5.html" target="_blank">slabinfo(5)</a> also.
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</td>
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</tr>
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<tr>
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<td>Slab Unreclaimable <br> (slab_unreclaimable)</td>
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<td id="slab_unreclaimable_pages" class="text--append-suffix-pages"></td>
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<td>
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Part of Slab, that cannot be reclaimed on memory pressure.
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>Mapped <br> (mapped)</td>
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<td id="mapped_pages" class="text--append-suffix-pages"></td>
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<td>
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Files which have been mapped into memory (with
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<a href="http://man7.org/linux/man-pages/man2/mmap.2.html">mmap(2)</a>), such as libraries.
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>Shared Memory <br> (shmem)</td>
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<td id="shmem_pages" class="text--append-suffix-pages"></td>
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<td>
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Amount of memory consumed in
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<a href="http://man7.org/linux/man-pages/man5/tmpfs.5.html">tmpfs(5)</a>
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filesystems.
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>Pagetables <br> (pagetables)</td>
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<td id="pagetables_pages" class="text--append-suffix-pages"></td>
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<td>
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Amount of memory dedicated to the lowest level of pagetables.
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>Bounce <br> (bounce)</td>
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<td id="bounce_pages" class="text--append-suffix-pages"></td>
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<td>
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Memory used for block device "bounce buffers".
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>free <br> (free)</td>
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<td id="free_pages" class="text--append-suffix-pages"></td>
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<td></td>
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</tr>
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<tr>
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<td>free_pcp <br> (free_pcp)</td>
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<td id="free_pcp_pages" class="text--append-suffix-pages"></td>
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<td></td>
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</tr>
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<tr>
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<td>free_cma <br> (free_cma)</td>
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<td id="free_cma_pages" class="text--append-suffix-pages"></td>
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<td></td>
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</tr>
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<tr>
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<td>Total Pagecache</td>
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<td id="pagecache_total_pages" class="text--append-suffix-pages"></td>
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<td></td>
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</tr>
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<!-- Swap Usage -->
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<tr>
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<td style="font-weight: bold">Swap Usage</td>
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<td></td>
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<td></td>
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</tr>
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<tr>
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<td>Swap Total</td>
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<td id="swap_total_kb" class="text--append-suffix-kbytes"></td>
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<td>Total amount of swap space available.
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>Swap Free</td>
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<td id="swap_free_kb" class="text--append-suffix-kbytes"></td>
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<td>Amount of swap space that is currently unused.
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>Swap Cached</td>
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<td id="swap_cache_kb" class="text--append-suffix-kbytes"></td>
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<td>Memory that once was swapped out, is swapped back in
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but still also is in the swap file. (If memory pres‐
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sure is high, these pages don't need to be swapped out
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again because they are already in the swap file. This
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saves I/O).
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<a class="a__footnote" href="#footnote-proc5">[1]</a>
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</td>
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</tr>
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<tr>
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<td>Swap Used</td>
|
||
<td id="swap_used_kb" class="text--append-suffix-kbytes"></td>
|
||
<td>Amount of used swap space w/o cached swap <br>
|
||
(<code>SwapUsed = SwapTotal - SwapFree -SwapCache</code>)
|
||
</td>
|
||
</tr>
|
||
|
||
<!-- Operating System -->
|
||
|
||
<tr>
|
||
<th scope="row" colspan="3">Operating System</th>
|
||
</tr>
|
||
<tr>
|
||
<td>Kernel</td>
|
||
<td id="kernel_version" class="text--align-right"></td>
|
||
<td></td>
|
||
</tr>
|
||
<tr>
|
||
<td>Distribution</td>
|
||
<td id="dist" class="text--align-right"></td>
|
||
<td>Guessed from the kernel version</td>
|
||
</tr>
|
||
<tr>
|
||
<td>Platform</td>
|
||
<td id="platform" class="text--align-right"></td>
|
||
<td>Guessed from the kernel version</td>
|
||
</tr>
|
||
<tr>
|
||
<td>Page size</td>
|
||
<td id="page_size" class="text--append-suffix-kbytes"></td>
|
||
<td>Guessed</td>
|
||
</tr>
|
||
|
||
|
||
<!-- Memory Chunks -->
|
||
|
||
<tr>
|
||
<th scope="row" colspan="3">Memory Chunks</th>
|
||
</tr>
|
||
<tr>
|
||
<td></td>
|
||
<td colspan="2" class="terminal">
|
||
<pre id="mem_node_info"></pre>
|
||
</td>
|
||
</tr>
|
||
|
||
<tr>
|
||
<th scope="row" colspan="3">Process Table</th>
|
||
</tr>
|
||
<tr>
|
||
<td></td>
|
||
<td colspan="2" class="terminal">
|
||
<pre id="process_table"></pre>
|
||
</td>
|
||
</tr>
|
||
|
||
<!-- Hardware Details -->
|
||
|
||
<tr>
|
||
<th scope="row" colspan="3">Hardware Details</th>
|
||
</tr>
|
||
<tr>
|
||
<td></td>
|
||
<td colspan="2" class="terminal">
|
||
<pre id="hardware_info"></pre>
|
||
</td>
|
||
</tr>
|
||
|
||
<!-- Kernel Call Tree -->
|
||
|
||
<tr>
|
||
<th scope="row" colspan="3">Kernel Call Trace</th>
|
||
</tr>
|
||
<tr>
|
||
<td></td>
|
||
<td colspan="2" class="terminal">
|
||
<pre id="call_trace"></pre>
|
||
</td>
|
||
</tr>
|
||
|
||
<!-- Initial OOM -->
|
||
|
||
<tr>
|
||
<th scope="row" colspan="3">Entire OOM Message
|
||
<a class="a--small" href="javascript:void(0);" id="oom_toogle_msg" onclick="OOMAnalyser.OOMDisplayInstance.toggle_oom()" title="Click to show/hide full OOM message">(click to hide)</a>
|
||
</th>
|
||
</tr>
|
||
<tr>
|
||
<td></td>
|
||
<td colspan="2" class="terminal">
|
||
<pre id="oom"></pre>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
|
||
<p>
|
||
Go back to
|
||
<a href="javascript:void(0);" onclick="OOMAnalyser.OOMDisplayInstance.reset_form()" title="Run a new analysis">"Step 1 - Enter your OOM message"</a>
|
||
to run a new analysis.
|
||
</p>
|
||
|
||
<h2>Footnotes</h2>
|
||
<ol>
|
||
<li id="footnote-proc5"><cite><a href="http://man7.org/linux/man-pages/man5/proc.5.html" target="_blank">
|
||
proc(5) - process information pseudo-filesystem</a></cite> (<a href="#" onclick="goBack()">Go Back</a>)
|
||
</li>
|
||
</ol>
|
||
</div>
|
||
|
||
<h2>Further Information</h2>
|
||
<ol>
|
||
<li>
|
||
<a href="https://man7.org/">Linux man pages online</a>
|
||
</li>
|
||
<li>
|
||
<a href="https://utcc.utoronto.ca/~cks/space/blog/linux/DecodingPageAllocFailures">
|
||
Decoding the Linux kernel's page allocation failure messages
|
||
</a>
|
||
</li>
|
||
<li>
|
||
<a href="http://elearningmedium.com/linux-kernel-oom-log-analysis/">Linux Kernel OOM Log Analysis</a>
|
||
</li>
|
||
</ol>
|
||
|
||
<h2>
|
||
Changelog
|
||
<a class="a--small" href="javascript:void(0);" onclick="OOMAnalyser.toggle('changelog')"
|
||
title="Show / hide news">(click to show / hide)</a>
|
||
</h2>
|
||
|
||
<div class="text--default-hide js-text--display-none" id="changelog">
|
||
<h3>Version 0.3.0 - 2019-XX-XX:</h3>
|
||
|
||
<h4>General</h4>
|
||
<ol>
|
||
<li>Separate analysis and visualisation code</li>
|
||
<li>Use CSS classes to control the visibility</li>
|
||
<li>Strip columns left to the message automatically</li>
|
||
<li>Lot if internal improvements and restructuring</li>
|
||
</ol>
|
||
|
||
<h4>Known issues</h4>
|
||
<ol>
|
||
<li>none</li>
|
||
</ol>
|
||
|
||
<h4>Note</h4>
|
||
<ol>
|
||
<li>
|
||
See the
|
||
<a href="https://github.com/CarstenGrohmann/OOMAnalyser/commits" title="commit history">commit history</a>
|
||
of the repository for a full list of changes.
|
||
</li>
|
||
</ol>
|
||
</div>
|
||
|
||
<h2>
|
||
Local Installation
|
||
<a class="a--small" href="javascript:void(0);" onclick="OOMAnalyser.toggle('installation')"
|
||
title="Show / hide installation guide">(click to show / hide)</a>
|
||
</h2>
|
||
|
||
<div class="text--default-hide js-text--display-none" id="installation">
|
||
Installing OOMAnalyser is quite easy since OOMAnalyser consists only of two files, a
|
||
HTML file and a JavaScript file. Both can be stored locally to use OOMAnalyser
|
||
without an Internet connection.
|
||
|
||
<h3>Installation steps</h3>
|
||
<ol>
|
||
<li>Create an own directory and add a <code>__javascript__</code> subdirectory</li>
|
||
<li>Download the <a download="OOMAnalyser.html" href="OOMAnalyser.html">HTML file</a> to the main directory and
|
||
the <a download="OOMAnalyser.js" href="__javascript__/OOMAnalyser.js">JavaScript file</a> to the
|
||
<code>__javascript__</code> subdirectory
|
||
</li>
|
||
<li>Open the file <code>OOMAnalyser.html</code> in your favourite browser.</li>
|
||
</ol>
|
||
</div>
|
||
|
||
<hr/>
|
||
|
||
<div class="footer">
|
||
OOMAnalyser <span id="version"></span> |
|
||
Copyright (C) 2017-2019 Carsten Grohmann |
|
||
<a href="javascript:void(0);" onclick="OOMAnalyser.toggle('license')" title="Show / hide license text">License: MIT</a> |
|
||
<a href="https://github.com/CarstenGrohmann/OOMAnalyser" title="Source code on GitHub">Source Code on GitHub</a>
|
||
</div>
|
||
|
||
<div class="license__text js-text--display-none" id="license">
|
||
<p>
|
||
Copyright (c) 2017-2019 Carsten Grohmann mail <add at here> carsten-grohmann.de
|
||
</p>
|
||
<p>
|
||
Permission is hereby granted, free of charge, to any person obtaining a copy of
|
||
this software and associated documentation files (the "Software"), to deal in
|
||
the Software without restriction, including without limitation the rights to
|
||
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
|
||
of the Software, and to permit persons to whom the Software is furnished to do
|
||
so, subject to the following conditions:
|
||
</p>
|
||
<p>
|
||
The above copyright notice and this permission notice shall be included in all
|
||
copies or substantial portions of the Software.
|
||
</p>
|
||
<p>
|
||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||
SOFTWARE.
|
||
</p>
|
||
</div>
|
||
|
||
</body>
|
||
</html>
|