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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-16868] Significant slowdown in capped collection performance when cap reached</title>
                <link>https://jira.mongodb.org/browse/SERVER-16868</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a smaller cache is used (1GB) and a high insert workload is applied to a capped collection, high insert latencies are seen once the collection reaches the capped value.&lt;/p&gt;</description>
                <environment></environment>
        <key id="178969">SERVER-16868</key>
            <summary>Significant slowdown in capped collection performance when cap reached</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="3">Duplicate</resolution>
                                        <assignee username="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="darren.wood@10gen.com">Darren Wood</reporter>
                        <labels>
                    </labels>
                <created>Thu, 15 Jan 2015 17:09:17 +0000</created>
                <updated>Sat, 24 Jan 2015 17:18:20 +0000</updated>
                            <resolved>Thu, 22 Jan 2015 17:12:24 +0000</resolved>
                                    <version>2.8.0-rc5</version>
                                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>13</watches>
                                                                                                                <comments>
                            <comment id="806886" author="xgen-internal-githook" created="Fri, 16 Jan 2015 21:27:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;michaelcahill&apos;, u&apos;name&apos;: u&apos;Michael Cahill&apos;, u&apos;email&apos;: u&apos;michael.cahill@wiredtiger.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16868&quot; title=&quot;Significant slowdown in capped collection performance when cap reached&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16868&quot;&gt;&lt;del&gt;SERVER-16868&lt;/del&gt;&lt;/a&gt; Limit the truncates done by each thread to manage WT capped collections.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6bab2f390cfbae08bf0801668f54a5fd35db2bfc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6bab2f390cfbae08bf0801668f54a5fd35db2bfc&lt;/a&gt;&lt;/p&gt;</comment>
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                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="176091">SERVER-16667</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="179303">SERVER-16919</issuekey>
        </issuelink>
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                                        <issuelink>
            <issuekey id="179303">SERVER-16919</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                                                <inwardlinks description="is related to">
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            <issuekey id="179306">SERVER-16921</issuekey>
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                            <customfieldvalue>&lt;p&gt;Same workload and setup as &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-16697&quot; title=&quot;MongoDb terminate when WT fault STATUS_STACK_OVERFLOW&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-16697&quot;&gt;&lt;del&gt;SERVER-16697&lt;/del&gt;&lt;/a&gt;. Test runs well and quickly fills collection on a C3-4xl EC2 machine, the number of client threads (100) may need to be reduced on less capable hardware.&lt;/p&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;mongod --storageEngine=wiredTiger --wiredTigerCacheSizeGB 1&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;$ git clone https://github.com/wiredtiger/mongo-tests.git&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;$ cd mongo-tests/SERVER-16697/&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;$ mongo --quiet 16697.js &lt;/span&gt;&lt;/pre&gt;
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