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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DOCS-13436] Investigate changes in SERVER-44710: Add metrics.repl.network.getmores.numEmptyBatches</title>
                <link>https://jira.mongodb.org/browse/DOCS-13436</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;Description&quot;&gt;&lt;/a&gt;Description&lt;/h2&gt;

    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;div class=&quot;panelContent&quot; style=&quot;background-color: #c2d2c2;&quot;&gt;
&lt;p&gt;    numEmptyBatches is a new field under metrics.repl.network.getmores. This number reports the number of empty oplog batches a secondary node receives from its sync source. A secondary will get an empty oplog batch only when it is fully synced (i.e. the oplog getmore operation does not initial return data) and if:&lt;br/&gt;
1. The getmore operation also times out waiting for more data (oplog entries).&lt;br/&gt;
OR&lt;br/&gt;
2. The sync source&apos;s majority commit point has advanced since the last batch sent to the secondary node.&lt;/p&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;ul&gt;
	&lt;li&gt;Add metrics.repl.network.getmores.numEmptyBatches&#160;on syncing nodes to report the number of empty batches to help diagnosing tailable awaitData logic.&lt;/li&gt;
&lt;/ul&gt;



&lt;h2&gt;&lt;a name=&quot;Scopeofchanges&quot;&gt;&lt;/a&gt;Scope of changes&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;ImpacttoOtherDocs&quot;&gt;&lt;/a&gt;Impact to Other Docs&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%28WorkandDate%29&quot;&gt;&lt;/a&gt;MVP (Work and Date)&lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%28ScopeorDesignDocs%2CInvision%2Cetc.%29&quot;&gt;&lt;/a&gt;Resources (Scope or Design Docs, Invision, etc.)&lt;/h2&gt;
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                <environment></environment>
        <key id="1165987">DOCS-13436</key>
            <summary>Investigate changes in SERVER-44710: Add metrics.repl.network.getmores.numEmptyBatches</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                            <label>docs-administration</label>
                    </labels>
                <created>Thu, 20 Feb 2020 16:12:56 +0000</created>
                <updated>Mon, 13 Nov 2023 18:09:46 +0000</updated>
                            <resolved>Mon, 27 Apr 2020 20:45:37 +0000</resolved>
                                                    <fixVersion>4.3.4</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                        <due>Fri, 1 May 2020 00:00:00 +0000</due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3057497" author="xgen-internal-githook" created="Mon, 27 Apr 2020 20:45:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Kay Kim&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;, &apos;username&apos;: &apos;kay-kim&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-13436&quot; title=&quot;Investigate changes in SERVER-44710: Add metrics.repl.network.getmores.numEmptyBatches&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-13436&quot;&gt;&lt;del&gt;DOCS-13436&lt;/del&gt;&lt;/a&gt;: serverstatus emptybatches metrics&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/bc2cf269e23ddbd784c6af68426809b28b9cdd4c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/bc2cf269e23ddbd784c6af68426809b28b9cdd4c&lt;/a&gt;&lt;/p&gt;</comment>
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