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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <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>[DOCS-867] improve concurrency faq</title>
                <link>https://jira.mongodb.org/browse/DOCS-867</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;First question complicates the answer by mixing locking behavior and granularity of locks. This should be split out, and lock def. should link to wikipedia page with better description in wiki docs.&lt;/p&gt;

&lt;p&gt;Yielding happens for more than disk access (which was added in 2.0 and expanded in 2.2). Multiple document writes yield as well as readers, periodically. This can allow reads during long (multi-doc) write operations.&lt;/p&gt;

&lt;p&gt;And there are more issues here... so it is best if this put back on the list for more review.&lt;/p&gt;</description>
                <environment>&lt;br/&gt;
&lt;br/&gt;
*Location*: &lt;a href=&quot;http://docs.mongodb.org/manual/faq/concurrency/&quot;&gt;http://docs.mongodb.org/manual/faq/concurrency/&lt;/a&gt;&lt;br/&gt;
*User-Agent*: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.91 Safari/537.11&lt;br/&gt;
*Referrer*: &lt;a href=&quot;http://www.mongodb.org/display/DOCS/How+does+concurrency+work&quot;&gt;http://www.mongodb.org/display/DOCS/How+does+concurrency+work&lt;/a&gt;&lt;br/&gt;
*Screen Resolution*: 1920 x 1200&lt;br/&gt;
</environment>
        <key id="58798">DOCS-867</key>
            <summary>improve concurrency faq</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="1" iconUrl="https://jira.mongodb.org/images/icons/priorities/blocker.svg">Blocker - P1</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="sam.kleinman">Sam Kleinman</assignee>
                                    <reporter username="scotthernandez">Scott Hernandez</reporter>
                        <labels>
                            <label>collector-298ba4e7</label>
                    </labels>
                <created>Mon, 10 Dec 2012 04:22:31 +0000</created>
                <updated>Mon, 10 Dec 2012 17:35:36 +0000</updated>
                            <resolved>Mon, 10 Dec 2012 17:35:36 +0000</resolved>
                                                                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="211204" author="auto" created="Mon, 10 Dec 2012 17:27:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-12-10T17:27:16Z&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-867&quot; title=&quot;improve concurrency faq&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-867&quot;&gt;&lt;del&gt;DOCS-867&lt;/del&gt;&lt;/a&gt;: factcheck correction on multi-reader concurrency&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/6d083ff829a25b2972f06b6625cd6310294ef6c8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/6d083ff829a25b2972f06b6625cd6310294ef6c8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="211175" author="auto" created="Mon, 10 Dec 2012 16:47:15 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-12-10T16:45:33Z&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-867&quot; title=&quot;improve concurrency faq&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-867&quot;&gt;&lt;del&gt;DOCS-867&lt;/del&gt;&lt;/a&gt; more information on yielding&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/523343e3d11a0a85e87355e067f8d7e4da12e183&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/523343e3d11a0a85e87355e067f8d7e4da12e183&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="211120" author="auto" created="Mon, 10 Dec 2012 16:01:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-12-10T16:00:17Z&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-867&quot; title=&quot;improve concurrency faq&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-867&quot;&gt;&lt;del&gt;DOCS-867&lt;/del&gt;&lt;/a&gt;: updates to the concurrency page&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/6728dc836f92fdae631d55ce9c04cdf084f44d52&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/6728dc836f92fdae631d55ce9c04cdf084f44d52&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="211100" author="samk" created="Mon, 10 Dec 2012 15:36:08 +0000"  >&lt;p&gt;Scott, thanks for the catch, &lt;/p&gt;

&lt;p&gt;I&apos;ll get a rev out this morning and we can mop up the remainder of the unspecified issues.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://www.mongodb.org/pages/viewpage.action?pageId=54624264&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.mongodb.org/pages/viewpage.action?pageId=54624264&lt;/a&gt;&lt;/p&gt;</comment>
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