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    <title>MongoDB Jira</title>
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    <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-19664] Reduce disk writes in drop_database.js FSM workload</title>
                <link>https://jira.mongodb.org/browse/SERVER-19664</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This bug is similar to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19653&quot; title=&quot;Reduce disk writes in rename_collection_dbname_chain.js FSM workload&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19653&quot;&gt;&lt;del&gt;SERVER-19653&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;In the concurrency suite, the drop_database.js FSM workload repeatedly creates and drops collections. With mmapv1, these sequences lead to the writing of ~12GB worth of cumulative data during the workload&apos;s lifetime, when run against a replica set.&lt;/p&gt;

&lt;p&gt;We should reduce the amount of data written to disk to speed up the workload and to prevent failures on Evergreen hosts.&lt;/p&gt;</description>
                <environment></environment>
        <key id="223420">SERVER-19664</key>
            <summary>Reduce disk writes in drop_database.js FSM workload</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="9">Done</resolution>
                                        <assignee username="kamran.khan">Kamran K.</assignee>
                                    <reporter username="kamran.khan">Kamran K.</reporter>
                        <labels>
                    </labels>
                <created>Thu, 30 Jul 2015 16:14:24 +0000</created>
                <updated>Sat, 19 Sep 2015 00:08:17 +0000</updated>
                            <resolved>Fri, 31 Jul 2015 16:44:08 +0000</resolved>
                                    <version>3.1.6</version>
                                    <fixVersion>3.1.7</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="994006" author="xgen-internal-githook" created="Fri, 31 Jul 2015 16:42:19 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kkmongo&apos;, u&apos;name&apos;: u&apos;Kamran Khan&apos;, u&apos;email&apos;: u&apos;kamran.khan@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19664&quot; title=&quot;Reduce disk writes in drop_database.js FSM workload&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19664&quot;&gt;&lt;del&gt;SERVER-19664&lt;/del&gt;&lt;/a&gt; Reduce test iterations in drop_database.js FSM workload&lt;/p&gt;

&lt;p&gt;The workload writes a lot of data to disk with mmapv1 because of 16MB&lt;br/&gt;
.ns and .0 files. This can cause fsm_all_replication.js to time out&lt;br/&gt;
on slow test hosts because the disk allocations do not complete within&lt;br/&gt;
five minutes.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/906c38b606f83034e0c063edbc20581077a9109a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/906c38b606f83034e0c063edbc20581077a9109a&lt;/a&gt;&lt;/p&gt;</comment>
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