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    <title>MongoDB Jira</title>
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    <description>This file is an XML representation of an issue</description>
    <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-517] yield on long running query</title>
                <link>https://jira.mongodb.org/browse/SERVER-517</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This will REALLY happen in 1.5.4&lt;br/&gt;
Will do it first so it can&apos;t slip&lt;/p&gt;</description>
                <environment></environment>
        <key id="11070">SERVER-517</key>
            <summary>yield on long running query</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="9">Done</resolution>
                                        <assignee username="eliot">Eliot Horowitz</assignee>
                                    <reporter username="eliot">Eliot Horowitz</reporter>
                        <labels>
                    </labels>
                <created>Sat, 2 Jan 2010 20:57:26 +0000</created>
                <updated>Tue, 12 Jul 2016 00:30:03 +0000</updated>
                            <resolved>Tue, 22 Jun 2010 06:43:08 +0000</resolved>
                                                    <fixVersion>1.5.4</fixVersion>
                                    <component>Concurrency</component>
                                        <votes>23</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="14937" author="auto" created="Tue, 22 Jun 2010 06:39:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;login&apos;: &apos;erh&apos;, &apos;name&apos;: &apos;Eliot Horowitz&apos;, &apos;email&apos;: &apos;eliot@10gen.com&apos;}
&lt;p&gt;Message: yield based off of scanned and time&lt;br/&gt;
ElapsedTracker class for managing (horrible name)&lt;br/&gt;
finish &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-517&quot; title=&quot;yield on long running query&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-517&quot;&gt;&lt;del&gt;SERVER-517&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://github.com/mongodb/mongo/commit/14344eeea3858c07f627a29ee7a6ad2e06b05d35&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/mongodb/mongo/commit/14344eeea3858c07f627a29ee7a6ad2e06b05d35&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="14936" author="auto" created="Tue, 22 Jun 2010 05:29:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;login&apos;: &apos;erh&apos;, &apos;name&apos;: &apos;Eliot Horowitz&apos;, &apos;email&apos;: &apos;eliot@10gen.com&apos;}
&lt;p&gt;Message: don&apos;t yield if you&apos;re a reader and only other readers are active &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-517&quot; title=&quot;yield on long running query&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-517&quot;&gt;&lt;del&gt;SERVER-517&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://github.com/mongodb/mongo/commit/fd3b8fa7adf62c7833b12a87c8e4693c7e2fec9a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/mongodb/mongo/commit/fd3b8fa7adf62c7833b12a87c8e4693c7e2fec9a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="14935" author="auto" created="Tue, 22 Jun 2010 05:29:12 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;login&apos;: &apos;erh&apos;, &apos;name&apos;: &apos;Eliot Horowitz&apos;, &apos;email&apos;: &apos;eliot@10gen.com&apos;}
&lt;p&gt;Message: yield on long running queries basics &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-517&quot; title=&quot;yield on long running query&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-517&quot;&gt;&lt;del&gt;SERVER-517&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://github.com/mongodb/mongo/commit/2b251ff7f626d67b3fc9e6e9de76092985981c20&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/mongodb/mongo/commit/2b251ff7f626d67b3fc9e6e9de76092985981c20&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="12669" author="dwight_10gen" created="Tue, 2 Mar 2010 12:10:34 +0000"  >&lt;p&gt;MongoDB queries allow substantial interleaving of other operations when the query returns a lot of data.  However when scanning and not returning data, the read lock is held.  This could be periodically released (yield) to allow more interleaving of operations.&lt;/p&gt;</comment>
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