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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>[SERVER-38259] Don&apos;t copy the tree on changes if all cursors are positioned behind it in BiggieSE</title>
                <link>https://jira.mongodb.org/browse/SERVER-38259</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently the biggie storage engine makes a copy on write of the head tree to any pending modifications even if all the cursors are behind the master copy.&lt;br/&gt;
We should avoid doing this so that we don&apos;t have to keep track of a potentially large trail of history (space and time consuming) that will be unused by the cursors when they catch up to the head again.&lt;/p&gt;</description>
                <environment></environment>
        <key id="638597">SERVER-38259</key>
            <summary>Don&apos;t copy the tree on changes if all cursors are positioned behind it in BiggieSE</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="13201">Fixed</resolution>
                                        <assignee username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</assignee>
                                    <reporter username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</reporter>
                        <labels>
                    </labels>
                <created>Tue, 27 Nov 2018 01:04:35 +0000</created>
                <updated>Sun, 29 Oct 2023 22:26:21 +0000</updated>
                            <resolved>Sun, 2 Dec 2018 22:59:09 +0000</resolved>
                                                    <fixVersion>4.1.6</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2077878" author="xgen-internal-githook" created="Sun, 2 Dec 2018 22:58:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38259&quot; title=&quot;Don&amp;#39;t copy the tree on changes if all cursors are positioned behind it in BiggieSE&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38259&quot;&gt;&lt;del&gt;SERVER-38259&lt;/del&gt;&lt;/a&gt; Don&apos;t copy the tree on changes if all cursors are positioned behind it in BiggieSE&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/88bcf424bc9830454847f015757ad710ee30827d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/88bcf424bc9830454847f015757ad710ee30827d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2077805" author="xgen-internal-githook" created="Sun, 2 Dec 2018 16:09:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38259&quot; title=&quot;Don&amp;#39;t copy the tree on changes if all cursors are positioned behind it in BiggieSE&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38259&quot;&gt;&lt;del&gt;SERVER-38259&lt;/del&gt;&lt;/a&gt; Don&apos;t copy the tree on changes if all cursors are positioned behind it in BiggieSE&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit cc503cd8acf294c09de3986acf35af7bce796a3a.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6aee0c4dc67fc4adaa3af60948349de2512d8bc8&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6aee0c4dc67fc4adaa3af60948349de2512d8bc8&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2077732" author="xgen-internal-githook" created="Sun, 2 Dec 2018 05:32:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38259&quot; title=&quot;Don&amp;#39;t copy the tree on changes if all cursors are positioned behind it in BiggieSE&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38259&quot;&gt;&lt;del&gt;SERVER-38259&lt;/del&gt;&lt;/a&gt; Don&apos;t copy the tree on changes if all cursors are positioned behind it in BiggieSE&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cc503cd8acf294c09de3986acf35af7bce796a3a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cc503cd8acf294c09de3986acf35af7bce796a3a&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="641189">SERVER-38340</issuekey>
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