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Yang, Tong
3b1f73dece
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com> Co-authored-by: Yang, Tong <yangtong2@huawei.com> Co-committed-by: Yang, Tong <yangtong2@huawei.com>
71 lines
10 KiB
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71 lines
10 KiB
HTML
<a name="alm_43013"></a><a name="alm_43013"></a>
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<h1 class="topictitle1">ALM-43013 JDBCServer GC Time Exceeds the Threshold</h1>
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<div id="body8662426"><div class="section" id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_section43920869"><h4 class="sectiontitle">Description</h4><p id="alm_43013__en-us_topic_0191813943_p14214871111947">The system checks the GC time of the JDBCServer process every 60 seconds. This alarm is generated when the detected GC time exceeds the threshold (12 seconds) for three consecutive times. You can change the threshold by choosing <strong id="alm_43013__b153935605054621">System</strong> > <strong id="alm_43013__b25849892054621">Threshold Configuration</strong> > <strong id="alm_43013__b191971843554621">Service</strong> > <strong id="alm_43013__b182457837554621">Spark</strong> > <strong id="alm_43013__b85476132054621">JDBCServer GC Time</strong> > <strong id="alm_43013__b212008025554621">Total JDBCServer GC Time</strong>. This alarm is cleared when the JDBCServer GC time is shorter than or equal to the threshold.</p>
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</div>
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<div class="section" id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_section59743502"><h4 class="sectiontitle">Attribute</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_table64843092" frame="border" border="1" rules="all"><thead align="left"><tr id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_row10409628"><th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.1"><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p37873528">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_43013__en-us_topic_0191813943_en-us_topic_0087039425_p47856888">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_43013__en-us_topic_0191813943_en-us_topic_0087039425_p51202692">Automatically Cleared</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_row53777413"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.1 "><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p61003235">43013</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_43013__en-us_topic_0191813943_en-us_topic_0087039425_p42315013">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_43013__en-us_topic_0191813943_en-us_topic_0087039425_p4964052">Yes</p>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section" id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_section820607"><h4 class="sectiontitle">Parameters</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_table66543927" frame="border" border="1" rules="all"><thead align="left"><tr id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_row61284534"><th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.1"><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p65100236">Parameter</p>
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</th>
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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_43013__en-us_topic_0191813943_en-us_topic_0087039425_p38627770">Description</p>
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</thead>
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<tbody><tr id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_row41841705"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p33734977">ServiceName</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p48178601">Specifies the service for which the alarm is generated.</p>
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</td>
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<tr id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_row30954226"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p24264406">RoleName</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p19259870">Specifies the role for which the alarm is generated.</p>
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</td>
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</tr>
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<tr id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_row39121107"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p14693133">HostName</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p49293152">Specifies the host for which the alarm is generated.</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section" id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_section7385465"><h4 class="sectiontitle">Impact on the System</h4><p id="alm_43013__en-us_topic_0191813943_p64414474151214">If the GC time exceeds the threshold, JDBCServer may run in low performance.</p>
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</div>
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<div class="section" id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_section66469189"><h4 class="sectiontitle">Possible Causes</h4><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p14756206">The heap memory of the JDBCServer process is overused or inappropriately allocated, causing frequent GC.</p>
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</div>
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<div class="section" id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_section61351797"><h4 class="sectiontitle">Procedure</h4><ol id="alm_43013__en-us_topic_0191813943_ol20218781175629"><li id="alm_43013__en-us_topic_0191813943_li47751305175629"><span>Check the GC time.</span><p><ol type="a" id="alm_43013__en-us_topic_0191813943_ol17980506181612"><li id="alm_43013__en-us_topic_0191813943_li1487713813414">Go to the cluster details page and choose <strong id="alm_43013__b173144116854621">Alarms</strong>.</li><li id="alm_43013__en-us_topic_0191813943_li58727490181612">Select the alarm whose <strong id="alm_43013__b93614707654621">Alarm ID</strong> is <strong id="alm_43013__b118872779854621">43013</strong> and view the IP address and role name of the instance in <strong id="alm_43013__b146861277654621">Location</strong>.</li><li id="alm_43013__en-us_topic_0191813943_li37461388181615">Choose <strong id="alm_43013__b38914756054621">Components</strong> > <strong id="alm_43013__b163035446554621">Spark</strong> > <strong id="alm_43013__b3711484354621">Instance</strong> > <strong id="alm_43013__b22268393554621">JDBCServer</strong> (IP address of the instance for which the alarm is generated) > <strong id="alm_43013__b36393106054621">Customize</strong> > <strong id="alm_43013__b50264859954621">GC Time of the JDBCServer Process</strong>. Click <strong id="alm_43013__b172042149154621">OK</strong> to view the GC time.</li><li id="alm_43013__en-us_topic_0191813943_li5803814181617">Check whether the GC time of the JDBCServer process is longer than 12 seconds. <ul id="alm_43013__en-us_topic_0191813943_ul2889331181625"><li id="alm_43013__en-us_topic_0191813943_li5345176181624">If yes, go to <a href="#alm_43013__en-us_topic_0191813943_li1011493181634">1.e</a>.</li><li id="alm_43013__en-us_topic_0191813943_li14368473181624">If no, go to <a href="#alm_43013__en-us_topic_0191813943_li572522141314">2</a>.</li></ul>
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</li><li id="alm_43013__en-us_topic_0191813943_li1011493181634"><a name="alm_43013__en-us_topic_0191813943_li1011493181634"></a><a name="en-us_topic_0191813943_li1011493181634"></a>Choose <strong id="alm_43013__b68321943354621">Components</strong> > <strong id="alm_43013__b170966553654621">Spark</strong> > <strong id="alm_43013__b24029150554621">Service Configuration</strong>. Set <strong id="alm_43013__b196515395754621">Type</strong> to <strong id="alm_43013__b36437804154621">All</strong> and choose <strong id="alm_43013__b127336637054621">JDBCServer</strong> > <strong id="alm_43013__b137331908154621">Tuning</strong>. Increase the value of the <strong id="alm_43013__b207072967654621">SPARK_DRIVER_MEMORY</strong> parameter as required.</li><li id="alm_43013__en-us_topic_0191813943_li11969688181637">Check whether the alarm is cleared.<ul id="alm_43013__en-us_topic_0191813943_ul51315766181641"><li id="alm_43013__en-us_topic_0191813943_li54070239181641">If yes, no further action is required.</li><li id="alm_43013__en-us_topic_0191813943_li17383192181641">If no, go to <a href="#alm_43013__en-us_topic_0191813943_li572522141314">2</a>.</li></ul>
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</li></ol>
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</p></li><li id="alm_43013__en-us_topic_0191813943_li572522141314"><a name="alm_43013__en-us_topic_0191813943_li572522141314"></a><a name="en-us_topic_0191813943_li572522141314"></a><span>Collect fault information.</span><p><ol type="a" id="alm_43013__en-us_topic_0191813943_en-us_topic_0191813935_ol6089206913036"><li id="alm_43013__en-us_topic_0191813943_en-us_topic_0191813935_li4478836213036">On MRS Manager, choose <span class="menucascade" id="alm_43013__menucascade19363595854621"><b><span class="uicontrol" id="alm_43013__uicontrol64326067354621">System</span></b> > <b><span class="uicontrol" id="alm_43013__uicontrol3324297654621">Export Log</span></b></span>.</li><li id="alm_43013__li18574327401">Contact technical support engineers for help. For details, see <a href="https://docs.otc.t-systems.com/en-us/public/learnmore.html" target="_blank" rel="noopener noreferrer">technical support</a>.</li></ol>
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</p></li></ol>
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</div>
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<div class="section" id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_section15295265"><h4 class="sectiontitle">Reference</h4><p id="alm_43013__en-us_topic_0191813943_en-us_topic_0087039425_p7510612">None</p>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="mrs_01_0241.html">Alarm Reference (Applicable to Versions Earlier Than MRS 3.x)</a></div>
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