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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-11247] Docs for SERVER-28923: Add diagnosability and supportability features for retryable writes</title>
                <link>https://jira.mongodb.org/browse/DOCS-11247</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;h1&gt;&lt;a name=&quot;DocumentationRequestSummary%3A&quot;&gt;&lt;/a&gt;Documentation Request Summary: &lt;/h1&gt;

&lt;p&gt;This ticket added a new section to the serverStatus response called &quot;transactions&quot; that contains 3 new fields:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;&quot;retriedCommandsCount&quot;
	&lt;ul&gt;
		&lt;li&gt;The total number of received write commands with statements that have already been executed, across all sessions&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;&quot;retriedStatementsCount&quot;
	&lt;ul&gt;
		&lt;li&gt;The total number of received statements that have already been executed, across all sessions&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;&quot;transactionsCollectionWriteCount&quot;
	&lt;ul&gt;
		&lt;li&gt;The total number of writes to the config.transactions collection, triggered when a new retryable write statement is committed. For updates and deletes there is one write per statement, but there is only one per batch of documents inserted, except when there is a failure that leads to each document being inserted separately.&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;&quot;retriedCommandsCount&quot; and &quot;retriedStatementsCount&quot; both ignore any retryable writes that may happen internally as part of a chunk migration, but &quot;transactionsCollectionWriteCount&quot; does include writes to a server&apos;s config.transactions collection that occur as part of a migration.&lt;/p&gt;

&lt;p&gt;All three are NumberLongs.&lt;/p&gt;


&lt;h2&gt;&lt;a name=&quot;Scopeofchanges%3A&quot;&gt;&lt;/a&gt;Scope of changes: &lt;/h2&gt;

&lt;ul&gt;
	&lt;li&gt;serverStatus (backport to 3.6)&lt;/li&gt;
	&lt;li&gt;retryable writes (backport to 3.6)&lt;/li&gt;
&lt;/ul&gt;



&lt;h2&gt;&lt;a name=&quot;Impacttootherdocsoutsideofthisproduct%3A&quot;&gt;&lt;/a&gt;Impact to other docs outside of this product: &lt;/h2&gt;

&lt;p&gt;none&lt;/p&gt;

&lt;h2&gt;&lt;a name=&quot;MVP%3A&quot;&gt;&lt;/a&gt;MVP: &lt;/h2&gt;

&lt;h2&gt;&lt;a name=&quot;Resources%3A&quot;&gt;&lt;/a&gt;Resources: &lt;/h2&gt;

&lt;h3&gt;&lt;a name=&quot;EngineeringTicketDescription%3A&quot;&gt;&lt;/a&gt;Engineering Ticket Description:&lt;/h3&gt;

&lt;p&gt;This ticket is a placeholder to figure out between ourselves and with TSE what supportability and diagnosability enhancements we might need to include for retryable writes.&lt;/p&gt;

&lt;p&gt;Things that come to mind include:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;FTDC metrics for number of active sessions&lt;/li&gt;
	&lt;li&gt;Metrics for the CPU (and if possible I/O) overhead of maintaining the retryability metadata&lt;/li&gt;
	&lt;li&gt;Metrics for number of writes which have been retried&lt;/li&gt;
	&lt;li&gt;If we end up with a cache, metrics for hit-rate&lt;/li&gt;
&lt;/ul&gt;

</description>
                <environment>&lt;a href=&quot;https://docs.mongodb.com/manual/reference/command/serverStatus/&quot;&gt;https://docs.mongodb.com/manual/reference/command/serverStatus/&lt;/a&gt;</environment>
        <key id="486648">DOCS-11247</key>
            <summary>Docs for SERVER-28923: Add diagnosability and supportability features for retryable writes</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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="kay.kim@mongodb.com">Kay Kim</reporter>
                        <labels>
                            <label>PM-257</label>
                            <label>serverstatus</label>
                            <label>transactions</label>
                    </labels>
                <created>Wed, 24 Jan 2018 07:19:55 +0000</created>
                <updated>Sun, 29 Oct 2023 13:58:28 +0000</updated>
                            <resolved>Tue, 12 Jun 2018 14:45:04 +0000</resolved>
                                                    <fixVersion>3.7.2</fixVersion>
                    <fixVersion>3.6.3</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1918352" author="xgen-internal-githook" created="Tue, 12 Jun 2018 14:44:58 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;kay-kim&apos;, &apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11247&quot; title=&quot;Docs for SERVER-28923: Add diagnosability and supportability features for retryable writes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11247&quot;&gt;&lt;del&gt;DOCS-11247&lt;/del&gt;&lt;/a&gt;: serverStatus.transactions&lt;br/&gt;
Branch: v3.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d2d08060966af312b9d527a66621f8cf1c6e68b2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d2d08060966af312b9d527a66621f8cf1c6e68b2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1918351" author="xgen-internal-githook" created="Tue, 12 Jun 2018 14:44:44 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;kay-kim&apos;, &apos;name&apos;: &apos;kay&apos;, &apos;email&apos;: &apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-11247&quot; title=&quot;Docs for SERVER-28923: Add diagnosability and supportability features for retryable writes&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-11247&quot;&gt;&lt;del&gt;DOCS-11247&lt;/del&gt;&lt;/a&gt;: serverStatus.transactions&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/7a113949b74aec592b6aab057d20667c29f4d451&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/7a113949b74aec592b6aab057d20667c29f4d451&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="376388">SERVER-28923</issuekey>
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