forked from docs/doc-exports
Lu, Huayi
e6fa411af0
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: Lu, Huayi <luhuayi@huawei.com> Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
28 lines
4.2 KiB
HTML
28 lines
4.2 KiB
HTML
<a name="EN-US_TOPIC_0000001233883183"></a><a name="EN-US_TOPIC_0000001233883183"></a>
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<h1 class="topictitle1">Alarm Detection</h1>
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<div id="body8662426"><p id="EN-US_TOPIC_0000001233883183__ab396c41c644d465086b7a96d8e4df08b">During cluster running, error scenarios can be detected in a timely manner to inform users as soon as possible.</p>
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<div class="section" id="EN-US_TOPIC_0000001233883183__s64134ad39d1842bda43ac5af8ded7ba0"><h4 class="sectiontitle">enable_alarm</h4><p id="EN-US_TOPIC_0000001233883183__a26179a11e5ff46c7b23f8fa5d6c56af0"><strong id="EN-US_TOPIC_0000001233883183__en-us_topic_0059779120_ab44f2b063aaf4beb8d6f6aea8f04c31b">Parameter description</strong>: Enables the alarm detection thread to detect the fault scenarios that may occur in the database.</p>
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<p id="EN-US_TOPIC_0000001233883183__p440031729"><strong id="EN-US_TOPIC_0000001233883183__b1585617555239">Type</strong>: POSTMASTER</p>
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<p id="EN-US_TOPIC_0000001233883183__abfcc7604674c4475a7b337fbbf49ebc3"><strong id="EN-US_TOPIC_0000001233883183__en-us_topic_0059779120_a93f09655437e4b668a4834d3b819174f">Value range</strong>: Boolean</p>
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<ul id="EN-US_TOPIC_0000001233883183__ubca291f528574f78ae343f6082a35a24"><li id="EN-US_TOPIC_0000001233883183__l98f939d7f427477ba817e0b2ad7c33ab"><strong id="EN-US_TOPIC_0000001233883183__b84235270618710">on</strong> indicates the alarm detection thread can be enabled.</li><li id="EN-US_TOPIC_0000001233883183__l2e51321b7b29425b89ab0214d56cb3dc"><strong id="EN-US_TOPIC_0000001233883183__b84235270618720">off</strong> indicates the alarm detection thread cannot be enabled.</li></ul>
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<p id="EN-US_TOPIC_0000001233883183__a0d466b2c89e94c4cb72f935e478702c0"><strong id="EN-US_TOPIC_0000001233883183__b842352706171026">Default value</strong>: <strong id="EN-US_TOPIC_0000001233883183__b842352706171029">on</strong></p>
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</div>
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<div class="section" id="EN-US_TOPIC_0000001233883183__s799728dade9147399f512b7eeca079e7"><h4 class="sectiontitle">connection_alarm_rate</h4><p id="EN-US_TOPIC_0000001233883183__a816dba984d0d4ff4abfe0b8fdb9b6a9a"><strong id="EN-US_TOPIC_0000001233883183__en-us_topic_0059779120_a7b22cc44e15b4e3b950043ceb60c0212">Parameter description</strong>: Specifies the ratio restriction that the maximum number of allowed parallel connections to the database. The maximum number of concurrent connections to the database is <a href="dws_04_0889.html#EN-US_TOPIC_0000001188482316__s2d671f584b5647a19255e7c6a3d116aa">max_connections</a> x <strong id="EN-US_TOPIC_0000001233883183__en-us_topic_0085032058_b842352706171528">connection_alarm_rate</strong>.</p>
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<p id="EN-US_TOPIC_0000001233883183__p6566171315125"><strong id="EN-US_TOPIC_0000001233883183__b124060577236">Type</strong>: SIGHUP</p>
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<p id="EN-US_TOPIC_0000001233883183__a35261d0a6ea1436aa364bbca3fd14d9c"><strong id="EN-US_TOPIC_0000001233883183__en-us_topic_0059779120_a493f4ca57d2e4bbda6442264338c34d4">Value range</strong>: a floating point number ranging from 0.0 to 1.0</p>
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<p id="EN-US_TOPIC_0000001233883183__ad4f462abda9b4b77bfe466c4ffe3ec28"><strong id="EN-US_TOPIC_0000001233883183__b2079710363717">Default value</strong>: <strong id="EN-US_TOPIC_0000001233883183__b17798936477">0.9</strong></p>
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</div>
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<div class="section" id="EN-US_TOPIC_0000001233883183__s5a358fa1d13d4ddeb44199de1ac695ca"><h4 class="sectiontitle">alarm_report_interval</h4><p id="EN-US_TOPIC_0000001233883183__a86979387c90d4122be7b7ee47bc4fe29"><strong id="EN-US_TOPIC_0000001233883183__en-us_topic_0059779120_a0670d066c73c42d48702957b0456f5e1">Parameter description</strong>: Specifies the interval at which an alarm is reported.</p>
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<p id="EN-US_TOPIC_0000001233883183__p114111148151112"><strong id="EN-US_TOPIC_0000001233883183__b22341859192315">Type</strong>: SIGHUP</p>
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<p id="EN-US_TOPIC_0000001233883183__ae4f3741b108d461a8dcb9c5250644c18"><strong id="EN-US_TOPIC_0000001233883183__b1803126386">Value range</strong>: a non-negative integer. The unit is second.</p>
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<p id="EN-US_TOPIC_0000001233883183__ac944114c9fc64189a904c64a8e831c7b"><strong id="EN-US_TOPIC_0000001233883183__b842352706171359">Default value</strong>: <strong id="EN-US_TOPIC_0000001233883183__b84235270617142">10</strong></p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_04_0883.html">GUC Parameters</a></div>
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</div>
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</div>
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