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Yang, Tong
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Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Reviewed-by: Rechenburg, Matthias <matthias.rechenburg@t-systems.com> Co-authored-by: Yang, Tong <yangtong2@huawei.com> Co-committed-by: Yang, Tong <yangtong2@huawei.com>
86 lines
12 KiB
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86 lines
12 KiB
HTML
<a name="ALM-23005"></a><a name="ALM-23005"></a>
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<h1 class="topictitle1">ALM-23005 Loader Non-Heap Memory Usage Exceeds the Threshold</h1>
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<div id="body37808747"><div class="section" id="ALM-23005__sf968e29f7325446db302b189f6e62e07"><h4 class="sectiontitle">Description</h4><p id="ALM-23005__en-us_topic_0070543529_p62498284">The system checks the non-heap memory usage of the Loader service every 30 seconds. The alarm is generated when the non-heap memory usage of a Loader instance exceeds the threshold (80% of the maximum memory) for 5 consecutive times. The alarm is cleared when the non-heap memory usage is less than the threshold.</p>
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<div class="section" id="ALM-23005__sae0c2d617b81455abd35fecc54f3ff01"><h4 class="sectiontitle">Attribute</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="ALM-23005__en-us_topic_0070543529_table29196278" frame="border" border="1" rules="all"><thead align="left"><tr id="ALM-23005__en-us_topic_0070543529_row60498887"><th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.1"><p id="ALM-23005__en-us_topic_0070543529_p1462819">Alarm ID</p>
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<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.2"><p id="ALM-23005__en-us_topic_0070543529_p51379511">Alarm Severity</p>
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<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.3"><p id="ALM-23005__en-us_topic_0070543529_p990892">Automatically Cleared</p>
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<tbody><tr id="ALM-23005__en-us_topic_0070543529_row13153450"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.1 "><p id="ALM-23005__en-us_topic_0070543529_p58796504">23005</p>
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.2 "><p id="ALM-23005__en-us_topic_0070543529_p64896350">Major</p>
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.3 "><p id="ALM-23005__en-us_topic_0070543529_p22112997">Yes</p>
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<div class="section" id="ALM-23005__s0a07a5d0e09341f5a517cdf9c71f2ba8"><h4 class="sectiontitle">Parameters</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="ALM-23005__en-us_topic_0070543529_table46322324" frame="border" border="1" rules="all"><thead align="left"><tr id="ALM-23005__en-us_topic_0070543529_row63878134"><th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.1"><p id="ALM-23005__en-us_topic_0070543529_p6746326">Name</p>
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<th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.2"><p id="ALM-23005__en-us_topic_0070543529_p9581506">Meaning</p>
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<tbody><tr id="ALM-23005__row1625417371998"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-23005__p192431315431">Source</p>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-23005__p692551319435">Specifies the cluster for which the alarm is generated.</p>
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<tr id="ALM-23005__en-us_topic_0070543529_row37904547"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-23005__en-us_topic_0070543529_p50369505">ServiceName</p>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-23005__en-us_topic_0070543529_p53398115">Specifies the service for which the alarm is generated.</p>
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<tr id="ALM-23005__en-us_topic_0070543529_row10820994"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-23005__en-us_topic_0070543529_p4085285">RoleName</p>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-23005__en-us_topic_0070543529_p62472706">Specifies the role for which the alarm is generated.</p>
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<tr id="ALM-23005__en-us_topic_0070543529_row25383445"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-23005__en-us_topic_0070543529_p42793145">HostName</p>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-23005__en-us_topic_0070543529_p43692714">Specifies the host for which the alarm is generated.</p>
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<tr id="ALM-23005__en-us_topic_0070543529_row57690106"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-23005__en-us_topic_0070543529_p42387016">Trigger Condition</p>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-23005__en-us_topic_0070543529_p10796311">Specifies the threshold triggering the alarm. If the current indicator value exceeds this threshold, the alarm is generated.</p>
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<div class="section" id="ALM-23005__sf61adb4696ca42a1a297938877f6c4c5"><h4 class="sectiontitle">Impact on the System</h4><p id="ALM-23005__en-us_topic_0070543529_p2086031">The non-heap memory overflow may cause a service breakdown.</p>
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<div class="section" id="ALM-23005__sa8e1bd8ee28b49d18d83e7b97c2d6b7e"><h4 class="sectiontitle">Possible Causes</h4><p id="ALM-23005__en-us_topic_0070543529_p34750807">The non-heap memory of the Loader instance is overused or the non-heap memory is inappropriately allocated.</p>
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<div class="section" id="ALM-23005__sdc7a0e5ece6449ed8474154ee7da7ed9"><h4 class="sectiontitle">Procedure</h4><p id="ALM-23005__en-us_topic_0070543529_p63351959"><strong id="ALM-23005__b4335170584344">Check non-heap memory usage.</strong></p>
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<ol id="ALM-23005__en-us_topic_0070543529_ol33296724"><li id="ALM-23005__en-us_topic_0070543529_li31235064"><span>On the <span id="ALM-23005__text34789336432">MRS</span> Manager portal, choose <strong id="ALM-23005__b0220040173412">O&M </strong>><strong id="ALM-23005__b5320184373410"> Alarm </strong>><strong id="ALM-23005__b163212435341"> Alarms</strong> > <strong id="ALM-23005__en-us_topic_0070543529_b47012257">Loader Non-Heap Memory Usage Exceeds the Threshold</strong> > <strong id="ALM-23005__en-us_topic_0070543529_b20457137">Location.</strong> Check the host name of the instance involved in this alarm.</span></li><li id="ALM-23005__en-us_topic_0070543529_li49896507"><span>On the <span id="ALM-23005__text5386154141115">MRS</span> Manager portal, choose<strong id="ALM-23005__b161244914158"> Cluster</strong> ><em id="ALM-23005__i146755821120"> Name of the desired cluster</em> > <strong id="ALM-23005__b4692965417821">Services</strong> > <strong id="ALM-23005__b1885262711285">Loader</strong> > <strong id="ALM-23005__b4320561417821">Instance</strong>. Click the instance for which the alarm is generated to go to the page for the instance. Click the drop-down menu in the chart area and choose <strong id="ALM-23005__b6942205911303">Customize</strong> > <strong id="ALM-23005__b1668141513312">Memory</strong> > <strong id="ALM-23005__en-us_topic_0070543677_b3530205">Loader Non Heap Memory Resource Percentage</strong>. Click <strong id="ALM-23005__b14975384229">OK</strong>.</span></li><li id="ALM-23005__en-us_topic_0070543529_li35587488"><span>Check whether the used non-heap memory of Loader reaches the threshold (the default value is 80% of the maximum non-heap memory) specified for Loader.</span><p><ul id="ALM-23005__en-us_topic_0070543529_ul51851944"><li id="ALM-23005__en-us_topic_0070543529_li64014316">If yes, go to <a href="#ALM-23005__l9abf73fe3f00454bb3c00cace4971b5d">4</a>.</li><li id="ALM-23005__en-us_topic_0070543529_li17777075">If no, go to <a href="#ALM-23005__en-us_topic_0070543529_d0e42144">6</a>.</li></ul>
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</p></li><li id="ALM-23005__l9abf73fe3f00454bb3c00cace4971b5d"><a name="ALM-23005__l9abf73fe3f00454bb3c00cace4971b5d"></a><a name="l9abf73fe3f00454bb3c00cace4971b5d"></a><span>On the <span id="ALM-23005__text6763174220115">MRS</span> Manager portal, choose <strong id="ALM-23005__b426813395357">Cluster </strong>><em id="ALM-23005__i32984219151"> Name of the desired cluster</em> ><strong id="ALM-23005__b429513212151"> Services</strong> > <strong id="ALM-23005__en-us_topic_0070543529_b188376">Loader</strong> > <strong id="ALM-23005__en-us_topic_0070543529_b1695389">Configurations</strong>. Click <strong id="ALM-23005__en-us_topic_0070543529_b3108787">All</strong> <strong id="ALM-23005__b13880001364">Configurations</strong> Search <strong id="ALM-23005__en-us_topic_0070543529_b27979087">LOADER_GC_OPTS</strong> in the search box. If the <strong id="ALM-23005__b2659113010413">-XX: MaxPermSize</strong> parameter is not configured, set the initial value to <strong id="ALM-23005__b116592300417">-XX: MaxPermSize=256M</strong> for the first time. (If the alarm persists after the first adjustment, perform the second adjustment by referring to the following note.) And click <strong id="ALM-23005__b9659330945">Save</strong>. Click <strong id="ALM-23005__b3659630141">OK</strong>.</span><p><div class="note" id="ALM-23005__note1045516603618"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="ALM-23005__p1014910509513">If this alarm is generated, the non-heap memory configured for the current Loader instance is insufficient for the service scenario. You are advised to open the instance monitoring page, open the Loader non-heap memory resource status monitoring chart, and observe the change trend of the non-heap memory used by Loader in the monitoring chart. Then change the value of <strong id="ALM-23005__b1410624913418">-XX:MaxPermSize</strong> to twice the current non-heap memory usage or to another value to meet site requirements.</p>
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</p></li><li id="ALM-23005__en-us_topic_0070543529_li51116569"><span>Restart the affected services or instances and check whether the alarm is cleared.</span><p><ul id="ALM-23005__en-us_topic_0070543529_ul57395943"><li id="ALM-23005__en-us_topic_0070543529_li46801442">If yes, no further action is required.</li><li id="ALM-23005__en-us_topic_0070543529_li18559795">If no, go to <a href="#ALM-23005__en-us_topic_0070543529_d0e42144">6</a>.</li></ul>
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</p></li></ol>
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<p id="ALM-23005__en-us_topic_0070543529_p26948387"><strong id="ALM-23005__b5385111384353">Collect fault information.</strong></p>
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<ol start="6" id="ALM-23005__ol893467884356"><li id="ALM-23005__en-us_topic_0070543529_d0e42144"><a name="ALM-23005__en-us_topic_0070543529_d0e42144"></a><a name="en-us_topic_0070543529_d0e42144"></a><span>On the <span id="ALM-23005__text1030204421110">MRS</span> Manager portal, choose <strong id="ALM-23005__b5496113117366">O&M</strong> > <strong id="ALM-23005__b4696143513612">Log </strong>><strong id="ALM-23005__b369723515369"> Download</strong>.</span></li><li id="ALM-23005__en-us_topic_0070543529_li57039000"><span>Select <strong id="ALM-23005__en-us_topic_0070543529_b43588958">Loader</strong> in the required cluster from the <strong id="ALM-23005__en-us_topic_0070543529_b56756307">Service</strong> drop-down list.</span></li><li id="ALM-23005__li1145664103113"><span>Click <span><img id="ALM-23005__image1945644173117" src="en-us_image_0000001532767722.png"></span> in the upper right corner, and set <strong id="ALM-23005__b6456941173117">Start Date</strong> and <strong id="ALM-23005__b11456154113318">End Date</strong> for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click <strong id="ALM-23005__b13456164113319">Download</strong>.</span></li><li id="ALM-23005__en-us_topic_0070543529_li13094167"><span>Contact the <span id="ALM-23005__text4614151421417">O&M personnel</span> and send the collected fault logs.</span></li></ol>
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<div class="section" id="ALM-23005__section1529716184534"><h4 class="sectiontitle">Alarm Clearing</h4><p id="ALM-23005__p4677152685316">After the fault is rectified, the system automatically clears this alarm.</p>
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<div class="section" id="ALM-23005__section12776143713493"><h4 class="sectiontitle">Related Information</h4><p id="ALM-23005__p1495823754913">None</p>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="mrs_01_1298.html">Alarm Reference (Applicable to MRS 3.x)</a></div>
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