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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-26778] Improve the speed of incremental chunk metadata refresh</title>
                <link>https://jira.mongodb.org/browse/SERVER-26778</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Initial chunk load, which requires a table scan, is 1.1 seconds:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2016-10-24T16:18:01.297+0000 I SHARDING [Balancer] ChunkManager: time to load chunks for buildlogs.logs: 1133ms sequenceNumber: 2 version: 157970|1||576339e709168e06c8eb8097 base&lt;/span&gt;&lt;/pre&gt;
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&lt;p&gt;Subsequent refreshes, which require a very fast query (0 ms) still take over 250ms:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;2016-10-24T16:33:41.683+0000 I SHARDING [Balancer] ChunkManager: time to load chunks for buildlogs.logs: 264ms sequenceNumber: 3 version: 157970|4||576339e709168e06c8eb8097 based&lt;/span&gt;&lt;/pre&gt;
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&lt;p&gt;This issue is to investigate the issue.&lt;/p&gt;</description>
                <environment></environment>
        <key id="326835">SERVER-26778</key>
            <summary>Improve the speed of incremental chunk metadata refresh</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="3">Duplicate</resolution>
                                        <assignee username="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="dan@mongodb.com">Daniel Pasette</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 Oct 2016 23:14:41 +0000</created>
                <updated>Thu, 8 Feb 2018 20:19:15 +0000</updated>
                            <resolved>Thu, 8 Feb 2018 20:19:04 +0000</resolved>
                                    <version>3.2.10</version>
                    <version>3.4.0-rc1</version>
                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>8</watches>
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            <issuekey id="309529">SERVER-25652</issuekey>
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