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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-33295] Kill long-running snapshot transactions</title>
                <link>https://jira.mongodb.org/browse/SERVER-33295</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;From the design,&lt;/p&gt;

&lt;p&gt;&quot;Motivation: &lt;br/&gt;
The &quot;oldest&quot; open transaction in WiredTiger will pin write history in cache until it finishes.  Here, &quot;oldest&quot; means the read timestamp is the earliest of any open transaction on the system.  Any write history with a timestamp equal to or newer than this read timestamp must stay pinned in cache, in order to serve the open transaction.  We need a way to prevent these transactions from staying open too long, in order to prevent cache pressure from becoming too extreme.&quot;&lt;/p&gt;

&lt;p&gt;Adding a transactionLifetimeLimitSeconds server parameter, which can be set at startup and via setParameter. Transaction will now expire, per the server parameter, and be asynchronously periodically cleaned up.&lt;/p&gt;</description>
                <environment></environment>
        <key id="497300">SERVER-33295</key>
            <summary>Kill long-running snapshot transactions</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="dianna.hohensee@mongodb.com">Dianna Hohensee</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Tue, 13 Feb 2018 17:29:43 +0000</created>
                <updated>Sun, 29 Oct 2023 22:34:46 +0000</updated>
                            <resolved>Fri, 13 Apr 2018 21:33:31 +0000</resolved>
                                                    <fixVersion>3.7.4</fixVersion>
                                    <component>Storage</component>
                                        <votes>1</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="1863676" author="xgen-internal-githook" created="Fri, 13 Apr 2018 15:29:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;dianna.hohensee@10gen.com&apos;, &apos;name&apos;: &apos;Dianna Hohensee&apos;, &apos;username&apos;: &apos;DiannaHohensee&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33295&quot; title=&quot;Kill long-running snapshot transactions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33295&quot;&gt;&lt;del&gt;SERVER-33295&lt;/del&gt;&lt;/a&gt; fixing lint&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e1c1f549af352f9574f0c54cc8e51ced13e17c61&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e1c1f549af352f9574f0c54cc8e51ced13e17c61&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1863616" author="xgen-internal-githook" created="Fri, 13 Apr 2018 15:00:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;dianna.hohensee@10gen.com&apos;, &apos;name&apos;: &apos;Dianna Hohensee&apos;, &apos;username&apos;: &apos;DiannaHohensee&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33295&quot; title=&quot;Kill long-running snapshot transactions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33295&quot;&gt;&lt;del&gt;SERVER-33295&lt;/del&gt;&lt;/a&gt; Periodic task to check for and kill expired transactions.&lt;/p&gt;

&lt;p&gt;(Adding a new int server parameter &apos;transactionLifetimeLimitSeconds&apos;.)&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/4f0c2f4047bdafe7a5d952a9671bf436a763c4d5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/4f0c2f4047bdafe7a5d952a9671bf436a763c4d5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1855811" author="siyuan.zhou@10gen.com" created="Wed, 4 Apr 2018 23:28:12 +0000"  >&lt;p&gt;Removing the dependency of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33432&quot; title=&quot;Implicit transaction abort&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33432&quot;&gt;&lt;del&gt;SERVER-33432&lt;/del&gt;&lt;/a&gt; since &lt;tt&gt;commitTransaction&lt;/tt&gt; on aborted transactions returns NoSuchTransaction which should be sufficient to check aborted transaction.&lt;/p&gt;</comment>
                            <comment id="1847171" author="dianna.hohensee" created="Tue, 27 Mar 2018 21:27:49 +0000"  >&lt;p&gt;Depends on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-33432&quot; title=&quot;Implicit transaction abort&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-33432&quot;&gt;&lt;del&gt;SERVER-33432&lt;/del&gt;&lt;/a&gt; making it an error to reuse old txn ids. Otherwise, I cannot test that a transaction was aborted by the background thread as expected: the insert just succeeds, beginning a new transaction with the same txn id.&lt;/p&gt;</comment>
                    </comments>
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                                        <issuelink>
            <issuekey id="515391">SERVER-34076</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is depended on by">
                                        <issuelink>
            <issuekey id="527198">SERVER-34486</issuekey>
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                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
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            <issuekey id="526627">DOCS-11599</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
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                                        <issuelink>
            <issuekey id="547108">SERVER-35114</issuekey>
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