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    <title>MongoDB Jira</title>
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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-34130] Log oplog truncation operation</title>
                <link>https://jira.mongodb.org/browse/SERVER-34130</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Some users are sensitive to the short stalls that can be caused by oplog truncation, which can be a moderately heavy operation. This can be difficult to diagnose; we could make it easier to diagnose by logging each oplog truncation like we log normal operations. Since oplog truncations are infrequent events this could be logged without regard to the slowms threshold.&lt;/p&gt;</description>
                <environment></environment>
        <key id="516629">SERVER-34130</key>
            <summary>Log oplog truncation operation</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="audrey.fang">Audrey Fang</assignee>
                                    <reporter username="bruce.lucas@mongodb.com">Bruce Lucas</reporter>
                        <labels>
                            <label>neweng</label>
                            <label>nyc</label>
                            <label>supportgrab2018Q2</label>
                    </labels>
                <created>Mon, 26 Mar 2018 14:10:40 +0000</created>
                <updated>Sun, 29 Oct 2023 22:33:21 +0000</updated>
                            <resolved>Wed, 6 Jun 2018 14:51:47 +0000</resolved>
                                                    <fixVersion>4.0.0-rc5</fixVersion>
                    <fixVersion>4.1.1</fixVersion>
                                    <component>Logging</component>
                    <component>Replication</component>
                                        <votes>1</votes>
                                    <watches>14</watches>
                                                                                                                <comments>
                            <comment id="1915166" author="xgen-internal-githook" created="Fri, 8 Jun 2018 14:42:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;audreyfang&apos;, &apos;name&apos;: &apos;Audrey Fang&apos;, &apos;email&apos;: &apos;audrey.fang@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34130&quot; title=&quot;Log oplog truncation operation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34130&quot;&gt;&lt;del&gt;SERVER-34130&lt;/del&gt;&lt;/a&gt; Log oplog truncation operation&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 62378f4e12644c250ccb894cf6b92d27b77b16fd)&lt;br/&gt;
Branch: v4.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9983c17b0da32d0b0918c47e081840d3a9ac3a85&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9983c17b0da32d0b0918c47e081840d3a9ac3a85&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1912405" author="xgen-internal-githook" created="Wed, 6 Jun 2018 14:40:50 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;audreyfang&apos;, &apos;name&apos;: &apos;Audrey Fang&apos;, &apos;email&apos;: &apos;audrey.fang@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-34130&quot; title=&quot;Log oplog truncation operation&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-34130&quot;&gt;&lt;del&gt;SERVER-34130&lt;/del&gt;&lt;/a&gt; Log oplog truncation operation&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/62378f4e12644c250ccb894cf6b92d27b77b16fd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/62378f4e12644c250ccb894cf6b92d27b77b16fd&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1874750" author="bruce.lucas@10gen.com" created="Thu, 26 Apr 2018 11:12:49 +0000"  >&lt;p&gt;I think it would be helpful if it were logged after, and included the time taken. It would be good if it matched slow operation logging to whatever extent is reasonable; in particular, if the line ends with &quot;&amp;lt;number&amp;gt;ms&quot; then tools that look for that pattern will pick it up.&lt;/p&gt;</comment>
                            <comment id="1874600" author="michael.cahill" created="Thu, 26 Apr 2018 01:55:09 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bruce.lucas&quot; class=&quot;user-hover&quot; rel=&quot;bruce.lucas&quot;&gt;bruce.lucas&lt;/a&gt;, for clarity, would you like logging before or after the truncate, or both?&lt;/p&gt;

&lt;p&gt;Is it important that the output match the format of the log line for a slow operation?&lt;/p&gt;</comment>
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