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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-38015] Confirm transactions don&apos;t hold on to tickets</title>
                <link>https://jira.mongodb.org/browse/SERVER-38015</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently transactions will obtain a writing ticket as part of their GlobalLock acquisition, and hold on to it for the duration of the transaction. However, if the average transaction takes 1 second because of network or application delays, that would mean you cannot do more than 128 transactions per second, even if the system is almost entirely idle.&lt;/p&gt;

&lt;p&gt;A possible solutions could be releasing tickets after the first use.&lt;/p&gt;</description>
                <environment></environment>
        <key id="630415">SERVER-38015</key>
            <summary>Confirm transactions don&apos;t hold on to tickets</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="geert.bosch@mongodb.com">Geert Bosch</assignee>
                                    <reporter username="geert.bosch@mongodb.com">Geert Bosch</reporter>
                        <labels>
                    </labels>
                <created>Wed, 7 Nov 2018 21:56:19 +0000</created>
                <updated>Sun, 29 Oct 2023 22:26:45 +0000</updated>
                            <resolved>Fri, 21 Dec 2018 23:04:54 +0000</resolved>
                                                    <fixVersion>4.1.7</fixVersion>
                                    <component>Concurrency</component>
                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="2407529" author="bruce.lucas@10gen.com" created="Wed, 4 Sep 2019 17:46:35 +0000"  >&lt;blockquote&gt;
&lt;p&gt;This may already work this way,&#160;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=geert.bosch&quot; class=&quot;user-hover&quot; rel=&quot;geert.bosch&quot;&gt;geert.bosch&lt;/a&gt;&#160;is going to double check.&lt;/p&gt;&lt;/blockquote&gt;
&lt;p&gt;It was confirmed that it already worked that way: transactions did not (and do not) hold onto tickets for the duration, and no code changes were implemented for this ticket.&lt;/p&gt;</comment>
                            <comment id="2099067" author="xgen-internal-githook" created="Fri, 21 Dec 2018 23:04:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;GeertBosch&apos;, &apos;email&apos;: &apos;geert@mongodb.com&apos;, &apos;name&apos;: &apos;Geert Bosch&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38015&quot; title=&quot;Confirm transactions don&amp;#39;t hold on to tickets&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38015&quot;&gt;&lt;del&gt;SERVER-38015&lt;/del&gt;&lt;/a&gt; Test many concurrent transactions&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/fc0555b28a9a5fbade9b47ac3b6eed17852be301&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/fc0555b28a9a5fbade9b47ac3b6eed17852be301&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2057143" author="sara.williamson" created="Fri, 9 Nov 2018 15:30:08 +0000"  >&lt;p&gt;This may already work this way, &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=geert.bosch&quot; class=&quot;user-hover&quot; rel=&quot;geert.bosch&quot;&gt;geert.bosch&lt;/a&gt; is going to double check.&lt;/p&gt;</comment>
                            <comment id="2055234" author="judah.schvimer" created="Wed, 7 Nov 2018 23:03:33 +0000"  >&lt;p&gt;Per discussion with &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=geert.bosch&quot; class=&quot;user-hover&quot; rel=&quot;geert.bosch&quot;&gt;geert.bosch&lt;/a&gt;, two other solutions could be:&lt;br/&gt;
1) A separate ticket pool for transactions&lt;br/&gt;
2) Transactions could release their tickets after their first statement and then acquire a &quot;re-acquisition ticket&quot; from another pool on subsequent statements. This shouldn&apos;t lead to deadlocks as long as transactions do not take conflicting locks.&lt;/p&gt;</comment>
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